bio

package
v0.0.0-...-85e8820 Latest Latest
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 Go to latest Published: Apr 2, 2024 License: MIT Imports: 13 Imported by: 1

Documentation

Overview

Package bio provides utilities for reading and writing sequence data.

There are many different biological file formats for different applications. The poly bio package provides a consistent way to work with each of these file formats. The underlying data returned by each parser is as raw as we can return while still being easy to use for downstream applications, and should be immediately recognizable as the original format.

Example (NewParserGz) 
package main

import (
	"bytes"
	"compress/gzip"
	"fmt"

	"github.com/koeng101/dnadesign/lib/bio"
)

func main() {
	// First, lets make a file that is gzip'd, represented by this
	// buffer.
	var file bytes.Buffer
	zipWriter := gzip.NewWriter(&file)
	_, _ = zipWriter.Write([]byte(`>gi|5524211|gb|AAD44166.1| cytochrome b [Elephas maximus maximus]
LCLYTHIGRNIYYGSYLYSETWNTGIMLLLITMATAFMGYVLPWGQMSFWGATVITNLFSAIPYIGTNLV
EWIWGGFSVDKATLNRFFAFHFILPFTMVALAGVHLTFLHETGSNNPLGLTSDSDKIPFHPYYTIKDFLG
LLILILLLLLLALLSPDMLGDPDNHMPADPLNTPLHIKPEWYFLFAYAILRSVPNKLGGVLALFLSIVIL
GLMPFLHTSKHRSMMLRPLSQALFWTLTMDLLTLTWIGSQPVEYPYTIIGQMASILYFSIILAFLPIAGX
IENY

>MCHU - Calmodulin - Human, rabbit, bovine, rat, and chicken
ADQLTEEQIAEFKEAFSLFDKDGDGTITTKELGTVMRSLGQNPTEAELQDMINEVDADGNGTID
FPEFLTMMARKMKDTDSEEEIREAFRVFDKDGNGYISAAELRHVMTNLGEKLTDEEVDEMIREA
DIDGDGQVNYEEFVQMMTAK*`))
	zipWriter.Close()

	fileDecompressed, _ := gzip.NewReader(&file) // Decompress the file
	parser := bio.NewFastaParser(fileDecompressed)
	records, _ := parser.Parse() // Parse all data records from file

	fmt.Println(records[1].Sequence)
}

Output:

ADQLTEEQIAEFKEAFSLFDKDGDGTITTKELGTVMRSLGQNPTEAELQDMINEVDADGNGTIDFPEFLTMMARKMKDTDSEEEIREAFRVFDKDGNGYISAAELRHVMTNLGEKLTDEEVDEMIREADIDGDGQVNYEEFVQMMTAK*
Example (Read)

Example_read shows an example of reading a file from disk. 

package main

import (
	"fmt"
	"os"

	"github.com/koeng101/dnadesign/lib/bio"
)

func main() {
	// Read lets you read files from disk into a parser.
	file, _ := os.Open("fasta/data/base.fasta")
	parser := bio.NewFastaParser(file)

	records, _ := parser.Parse()

	fmt.Println(records[1].Sequence)
}

Output:

ADQLTEEQIAEFKEAFSLFDKDGDGTITTKELGTVMRSLGQNPTEAELQDMINEVDADGNGTIDFPEFLTMMARKMKDTDSEEEIREAFRVFDKDGNGYISAAELRHVMTNLGEKLTDEEVDEMIREADIDGDGQVNYEEFVQMMTAK*
Example (ReadGz)

Example_readGz shows an example of reading and parsing a gzipped file. 

package main

import (
	"compress/gzip"
	"fmt"
	"os"

	"github.com/koeng101/dnadesign/lib/bio"
)

func main() {
	fileGz, _ := os.Open("fasta/data/base.fasta.gz")
	file, _ := gzip.NewReader(fileGz)
	parser := bio.NewFastaParser(file)
	records, _ := parser.Parse()

	fmt.Println(records[1].Sequence)
}

Output:

ADQLTEEQIAEFKEAFSLFDKDGDGTITTKELGTVMRSLGQNPTEAELQDMINEVDADGNGTIDFPEFLTMMARKMKDTDSEEEIREAFRVFDKDGNGYISAAELRHVMTNLGEKLTDEEVDEMIREADIDGDGQVNYEEFVQMMTAK*
Example (RunWorkflow) 
package main

import (
	"context"
	"fmt"
	"strings"

	"github.com/koeng101/dnadesign/lib/bio"
	"github.com/koeng101/dnadesign/lib/bio/fastq"
	"golang.org/x/sync/errgroup"
)

func main() {
	// Workflows are a way of running bioinformatics programs replacing stdin/stdout
	// with go channels. This allows for concurrent processing of data.
	//
	// Currently, we just use standard errorGroup handling for workflows, but
	// aim to support multiple workers for maximizing throughput.

	// First, setup parser
	file := strings.NewReader(`@289a197e-4c05-4143-80e6-488e23044378 runid=bb4427242f6da39e67293199a11c6c4b6ab2b141 read=34575 ch=111 start_time=2023-12-29T16:06:13.719061-08:00 flow_cell_id=AQY258 protocol_group_id=nseq28 sample_id=build3-build3gg-u11 barcode=barcode06 barcode_alias=barcode06 parent_read_id=289a197e-4c05-4143-80e6-488e23044378 basecall_model_version_id=dna_r10.4.1_e8.2_400bps_sup@v4.2.0
TTTTGTCTACTTCGTTCCGTTGCGTATTGCTAAGGTTAAGACTACTTTCTGCCTTTGCGAGACGGCGCCTCCGTGCGACGAGATTTCAAGGGTCTCTGTGCTATATTGCCGCTAGTTCCGCTCTAGCTGCTCCAGTTAATACTACTACTGAAGATGAATTGGAGGGTGACTTCGATGTTGCTGTTCTGCCTTTTTCCGCTTCTGAGACCCAGATCGACTTTTAGATTCCTCAGGTGCTGTTCTCGCAAAGGCAGAAAGTAGTCTTAACCTTAGCAATACGTGG
+
$%%&%%$$%&'+)**,-+)))+866788711112=>A?@@@BDB@>?746@?>A@D2@970,-+..*++++;662/.-.+,++,//+167>A@A@@B=<887-,'&&%%&''((5555644578::<==B?ABCIJA>>>>@DCAA99::<BAA@-----DECJEDDEGEFHE;;;:;;:88754998989998887,-<<;<>>=<<<=67777+***)//+,,+)&&&+--.02:>442000/1225:=D?=<<=7;866/..../AAA226545+&%%$$
@af86ed57-1cfe-486f-8205-b2c8d1186454 runid=bb4427242f6da39e67293199a11c6c4b6ab2b141 read=2233 ch=123 start_time=2023-12-29T10:04:32.719061-08:00 flow_cell_id=AQY258 protocol_group_id=nseq28 sample_id=build3-build3gg-u11 barcode=barcode07 barcode_alias=barcode07 parent_read_id=af86ed57-1cfe-486f-8205-b2c8d1186454 basecall_model_version_id=dna_r10.4.1_e8.2_400bps_sup@v4.2.0
TGTCCTTTACTTCGTTCAGTTACGTATTGCTAAGGTTAAGACTACTTTCTGCCTTTGCGAGAACAGCACCTCTGCTAGGGGCTACTTATCGGGTCTCTAGTTCCGCTCTAGCTGCTCCAGTTAATACTACTACTGAAGATGAATTGGAGGGTGACTTCGATGTTGCTGTTCTGCCTTTTTCCGCTTCTATCTGAGACCGAAGTGGTTTGCCTAAACGCAGGTGCTGTTGGCAAAGGCAGAAAGTAGTCTTAACCTTGACAATGAGTGGTA
+
$%&$$$$$#')+)+,<>@B?>==<>>;;<<<B??>?@DA@?=>==>??<>??7;<706=>=>CBCCB????@CCBDAGFFFGJ<<<<<=54455>@?>:::9..++?@BDCCDCGECFHD@>=<<==>@@B@?@@>>>==>>===>>>A?@ADFGDCA@?????CCCEFDDDDDGJODAA@A;;ABBD<=<:92222223:>>@?@@B?@=<62212=<<<=>AAB=<'&&&'-,-.,**)'&'(,,,-.114888&&&&&'+++++,,*`)
	parser := bio.NewFastqParser(file)

	// We setup the error group here. It's context is used if we need to cancel
	// code that is running.
	ctx := context.Background()
	errorGroup, ctx := errgroup.WithContext(ctx)

	// Now we set up a workflow. We need two things: channels for the internal
	// workflow steps to pass between, and the workflow steps themselves. We
	// Set them up here.
	fastqReads := make(chan fastq.Read)
	fastqBarcoded := make(chan fastq.Read)

	// Read fastqs into channel
	errorGroup.Go(func() error {
		return parser.ParseToChannel(ctx, fastqReads, false)
	})

	// Filter the right barcode fastqs from channel
	barcode := "barcode07"
	errorGroup.Go(func() error {
		// We're going to start multiple workers within this errorGroup. This
		// helps when doing computationally intensive operations on channels.
		return bio.RunWorkers(ctx, 2, fastqBarcoded, func(ctx context.Context) error {
			return bio.FilterData(ctx, fastqReads, fastqBarcoded, func(data fastq.Read) bool { return data.Optionals["barcode"] == barcode })
		})
	})

	// Now, check the outputs. We should have sorted only for barcode07
	var reads []fastq.Read
	for read := range fastqBarcoded {
		reads = append(reads, read)
	}

	fmt.Println(reads[0].Identifier)
}

Output:

af86ed57-1cfe-486f-8205-b2c8d1186454
Example (WriteAll) 
package main

import (
	"bytes"
	"fmt"
	"strings"

	"github.com/koeng101/dnadesign/lib/bio"
)

func main() {
	// The following can be replaced with a any io.Reader. For example,
	// `file, err := os.Open(path)` for file would also work.
	file := strings.NewReader(`#slow5_version	0.2.0
#num_read_groups	1
@asic_id	4175987214
#char*	uint32_t	double	double	double	double	uint64_t	int16_t*	uint64_t	int32_t	uint8_t	double	enum{unknown,partial,mux_change,unblock_mux_change,data_service_unblock_mux_change,signal_positive,signal_negative}	char*
#read_id	read_group	digitisation	offset	range	sampling_rate	len_raw_signal	raw_signal	start_time	read_number	start_mux	median_before	end_reason	channel_number
0026631e-33a3-49ab-aa22-3ab157d71f8b	0	8192	16	1489.52832	4000	5347	430,472,463	8318394	5383	1	219.133423	5	10
`)
	parser, _ := bio.NewSlow5Parser(file)
	reads, header, _ := parser.ParseWithHeader() // Parse all data records from file

	// Write the files to an io.Writer.
	// All headers and all records implement io.WriterTo interfaces.
	var buffer bytes.Buffer
	_, _ = header.WriteTo(&buffer)
	for _, read := range reads {
		_, _ = read.WriteTo(&buffer)
	}

	fmt.Println(buffer.String())
}

Output:

#slow5_version	0.2.0
#num_read_groups	1
@asic_id	4175987214
#char*	uint32_t	double	double	double	double	uint64_t	int16_t*	uint64_t	int32_t	uint8_t	double	enum{unknown,partial,mux_change,unblock_mux_change,data_service_unblock_mux_change,signal_positive,signal_negative}	char*
#read_id	read_group	digitisation	offset	range	sampling_rate	len_raw_signal	raw_signal	start_time	read_number	start_mux	median_before	end_reason	channel_number
0026631e-33a3-49ab-aa22-3ab157d71f8b	0	8192	16	1489.52832	4000	5347	430,472,463	8318394	5383	1	219.133423	5	10

Index

Examples

Constants

This section is empty.

Variables

View Source 
var DefaultMaxLengths = map[Format]int{
	Fasta:   defaultMaxLineLength,
	Fastq:   8 * 1024 * 1024,
	Genbank: defaultMaxLineLength,
	Slow5:   128 * 1024 * 1024,
	Sam:     defaultMaxLineLength,
	Pileup:  defaultMaxLineLength,
}

Functions

func FilterData 

func FilterData[Data DataTypes](ctx context.Context, input <-chan Data, output chan<- Data, filter func(a Data) bool) error

FilterData is a generic function that implements a channel filter. Users give an input and output channel, with a filtering function, and FilterData filters data from the input into the output.

Example 
package main

import (
	"context"
	"fmt"

	"github.com/koeng101/dnadesign/lib/bio"
	"github.com/koeng101/dnadesign/lib/bio/sam"
	"golang.org/x/sync/errgroup"
)

func main() {
	// Create channels for input and output
	inputChan := make(chan sam.Alignment, 2) // Buffered channel to prevent blocking
	outputChan := make(chan sam.Alignment)

	var results []sam.Alignment
	ctx := context.Background()
	errorGroup, ctx := errgroup.WithContext(ctx)
	errorGroup.Go(func() error {
		return bio.RunWorkers(ctx, 1, outputChan, func(ctx context.Context) error {
			return bio.FilterData(ctx, inputChan, outputChan, func(data sam.Alignment) bool { return (data.FLAG & 0x900) == 0 })
		})
	})

	// Send some example Alignments to the input channel
	inputChan <- sam.Alignment{FLAG: 0x900}              // Not primary, should not be outputted
	inputChan <- sam.Alignment{SEQ: "FAKE", FLAG: 0x000} // Primary, should be outputted
	close(inputChan)                                     // Close the input channel to signal no more data

	// Collect results from the output channel
	for alignment := range outputChan {
		results = append(results, alignment)
	}

	fmt.Println(results)
}

Output:

[{ 0  0 0   0 0 FAKE  []}]

func ManyToChannel 

func ManyToChannel[Data DataTypes, Header HeaderTypes](ctx context.Context, channel chan<- Data, parsers ...*Parser[Data, Header]) error

ManyToChannel is a generic function that implements the ManyXXXToChannel functions. It properly does concurrent parsing of many parsers to a single channel, then closes that channel. If any of the files fail to parse, the entire pipeline exits and returns.

Example 
package main

import (
	"context"
	"fmt"
	"strings"

	"github.com/koeng101/dnadesign/lib/bio"
	"github.com/koeng101/dnadesign/lib/bio/fasta"
)

func main() {
	file1 := strings.NewReader(`>gi|5524211|gb|AAD44166.1| cytochrome b [Elephas maximus maximus]
LCLYTHIGRNIYYGSYLYSETWNTGIMLLLITMATAFMGYVLPWGQMSFWGATVITNLFSAIPYIGTNLV
EWIWGGFSVDKATLNRFFAFHFILPFTMVALAGVHLTFLHETGSNNPLGLTSDSDKIPFHPYYTIKDFLG
LLILILLLLLLALLSPDMLGDPDNHMPADPLNTPLHIKPEWYFLFAYAILRSVPNKLGGVLALFLSIVIL
GLMPFLHTSKHRSMMLRPLSQALFWTLTMDLLTLTWIGSQPVEYPYTIIGQMASILYFSIILAFLPIAGX
IENY
`)
	file2 := strings.NewReader(`>MCHU - Calmodulin - Human, rabbit, bovine, rat, and chicken
ADQLTEEQIAEFKEAFSLFDKDGDGTITTKELGTVMRSLGQNPTEAELQDMINEVDADGNGTID
FPEFLTMMARKMKDTDSEEEIREAFRVFDKDGNGYISAAELRHVMTNLGEKLTDEEVDEMIREA
DIDGDGQVNYEEFVQMMTAK*`)
	parser1 := bio.NewFastaParser(file1)
	parser2 := bio.NewFastaParser(file2)

	channel := make(chan fasta.Record)
	ctx := context.Background()
	go func() { _ = bio.ManyToChannel(ctx, channel, parser1, parser2) }()

	var records []fasta.Record
	for record := range channel {
		records = append(records, record)
	}

	fmt.Println(len(records)) // Records come out in a stochastic order, so we just make sure there are 2
}

Output:

2

func RunWorkers 

func RunWorkers[Data DataTypes](ctx context.Context, numWorkers int, output chan<- Data, work WorkerFunc) error

RunWorkers starts a specified number of workers, each executing the provided WorkerFunc. It uses an errgroup.Group to manage the workers and handle errors.

Types

type DataTypes 

type DataTypes interface {
	genbank.Genbank | fasta.Record | fastq.Read | slow5.Read | sam.Alignment | pileup.Line | uniprot.Entry
}

DataTypes defines the possible data types returned by every parser.

type Format 

type Format int

Format is a enum of different parser formats. 

const (
	Fasta Format = iota
	Fastq
	Genbank
	Slow5
	Sam
	Pileup
)

type HeaderTypes 

type HeaderTypes interface {
	genbank.Header | fasta.Header | fastq.Header | slow5.Header | sam.Header | pileup.Header | uniprot.Header
}

HeaderTypes defines the possible header types returned by every parser.

type Parser 

type Parser[Data DataTypes, Header HeaderTypes] struct {
	ParserInterface ParserInterface[Data, Header]
}

Parser is generic bioinformatics file parser. It contains a LowerLevelParser and implements useful functions on top of it: such as Parse(), ParseToChannel(), and ParseWithHeader().

func NewFastaParser 

func NewFastaParser(r io.Reader) *Parser[fasta.Record, fasta.Header]

NewFastaParser initiates a new FASTA parser from an io.Reader.

Example 
package main

import (
	"fmt"
	"strings"

	"github.com/koeng101/dnadesign/lib/bio"
)

func main() {
	// The following can be replaced with a any io.Reader. For example,
	// `file, err := os.Open(path)` for file would also work.
	file := strings.NewReader(`>gi|5524211|gb|AAD44166.1| cytochrome b [Elephas maximus maximus]
LCLYTHIGRNIYYGSYLYSETWNTGIMLLLITMATAFMGYVLPWGQMSFWGATVITNLFSAIPYIGTNLV
EWIWGGFSVDKATLNRFFAFHFILPFTMVALAGVHLTFLHETGSNNPLGLTSDSDKIPFHPYYTIKDFLG
LLILILLLLLLALLSPDMLGDPDNHMPADPLNTPLHIKPEWYFLFAYAILRSVPNKLGGVLALFLSIVIL
GLMPFLHTSKHRSMMLRPLSQALFWTLTMDLLTLTWIGSQPVEYPYTIIGQMASILYFSIILAFLPIAGX
IENY

>MCHU - Calmodulin - Human, rabbit, bovine, rat, and chicken
ADQLTEEQIAEFKEAFSLFDKDGDGTITTKELGTVMRSLGQNPTEAELQDMINEVDADGNGTID
FPEFLTMMARKMKDTDSEEEIREAFRVFDKDGNGYISAAELRHVMTNLGEKLTDEEVDEMIREA
DIDGDGQVNYEEFVQMMTAK*`)
	parser := bio.NewFastaParser(file)
	records, _ := parser.Parse() // Parse all data records from file

	fmt.Println(records[1].Sequence)
}

Output:

ADQLTEEQIAEFKEAFSLFDKDGDGTITTKELGTVMRSLGQNPTEAELQDMINEVDADGNGTIDFPEFLTMMARKMKDTDSEEEIREAFRVFDKDGNGYISAAELRHVMTNLGEKLTDEEVDEMIREADIDGDGQVNYEEFVQMMTAK*

func NewFastaParserWithMaxLineLength 

func NewFastaParserWithMaxLineLength(r io.Reader, maxLineLength int) *Parser[fasta.Record, fasta.Header]

NewFastaParserWithMaxLineLength initiates a new FASTA parser from an io.Reader and a user-given maxLineLength.

func NewFastqParser 

func NewFastqParser(r io.Reader) *Parser[fastq.Read, fastq.Header]

NewFastqParser initiates a new FASTQ parser from an io.Reader.

Example 
package main

import (
	"fmt"
	"strings"

	"github.com/koeng101/dnadesign/lib/bio"
)

func main() {
	// The following can be replaced with a any io.Reader. For example,
	// `file, err := os.Open(path)` for file would also work.
	file := strings.NewReader(`@e3cc70d5-90ef-49b6-bbe1-cfef99537d73 runid=99790f25859e24307203c25273f3a8be8283e7eb read=13956 ch=53 start_time=2020-11-11T01:49:01Z flow_cell_id=AEI083 protocol_group_id=NanoSav2 sample_id=nanosavseq2
GATGTGCGCCGTTCCAGTTGCGACGTACTATAATCCCCGGCAACACGGTGCTGATTCTCTTCCTGTTCCAGAAAGCATAAACAGATGCAAGTCTGGTGTGATTAACTTCACCAAAGGGCTGGTTGTAATATTAGGAAATCTAACAATAGATTCTGTTGGTTGGACTCTAAAATTAGAAATTTGATAGATTCCTTTTCCCAAATGAAAGTTTAACGTACACTTTGTTTCTAAAGGAAGGTCAAATTACAGTCTACAGCATCGTAATGGTTCATTTTCATTTATATTTTAATACTAGAAAAGTCCTAGGTTGAAGATAACCACATAATAAGCTGCAACTTCAGCTGTCCCAACCTGAAGAAGAATCGCAGGAGTCGAAATAACTTCTGTAAAGCAAGTAGTTTGAACCTATTGATGTTTCAACATGAGCAATACGTAACT
+
$$&%&%#$)*59;/767C378411,***,('11<;:,0039/0&()&'2(/*((4.1.09751).601+'#&&&,-**/0-+3558,/)+&)'&&%&$$'%'%'&*/5978<9;**'3*'&&A?99:;:97:278?=9B?CLJHGG=9<@AC@@=>?=>D>=3<>=>3362$%/((+/%&+//.-,%-4:+..000,&$#%$$%+*)&*0%.//*?<<;>DE>.8942&&//074&$033)*&&&%**)%)962133-%'&*99><<=1144??6.027639.011/-)($#$(/422*4;:=122>?@6964:.5'8:52)*675=:4@;323&&##'.-57*4597)+0&:7<7-550REGB21/0+*79/&/6538())+)+23665+(''$$$'-2(&&*-.-#$&%%$$,-)&$$#$'&,);;<C<@454)#'`) // This is a real sequencing output, btw
	parser := bio.NewFastqParser(file)
	records, _ := parser.Parse() // Parse all data records from file

	fmt.Println(records[0].Sequence)
}

Output:

GATGTGCGCCGTTCCAGTTGCGACGTACTATAATCCCCGGCAACACGGTGCTGATTCTCTTCCTGTTCCAGAAAGCATAAACAGATGCAAGTCTGGTGTGATTAACTTCACCAAAGGGCTGGTTGTAATATTAGGAAATCTAACAATAGATTCTGTTGGTTGGACTCTAAAATTAGAAATTTGATAGATTCCTTTTCCCAAATGAAAGTTTAACGTACACTTTGTTTCTAAAGGAAGGTCAAATTACAGTCTACAGCATCGTAATGGTTCATTTTCATTTATATTTTAATACTAGAAAAGTCCTAGGTTGAAGATAACCACATAATAAGCTGCAACTTCAGCTGTCCCAACCTGAAGAAGAATCGCAGGAGTCGAAATAACTTCTGTAAAGCAAGTAGTTTGAACCTATTGATGTTTCAACATGAGCAATACGTAACT

func NewFastqParserWithMaxLineLength 

func NewFastqParserWithMaxLineLength(r io.Reader, maxLineLength int) *Parser[fastq.Read, fastq.Header]

NewFastqParserWithMaxLineLength initiates a new FASTQ parser from an io.Reader and a user-given maxLineLength.

func NewGenbankParser 

func NewGenbankParser(r io.Reader) *Parser[genbank.Genbank, genbank.Header]

NewGenbankParser initiates a new Genbank parser form an io.Reader.

Example 
package main

import (
	"fmt"
	"strings"

	"github.com/koeng101/dnadesign/lib/bio"
)

func main() {
	// The following can be replaced with a any io.Reader. For example,
	// `file, err := os.Open(path)` for file would also work.
	file := strings.NewReader(`LOCUS       pUC19_lacZ         336 bp DNA     linear   UNA 12-SEP-2023
DEFINITION  natural linear DNA
ACCESSION   .
VERSION     .
KEYWORDS    .
SOURCE      natural DNA sequence
  ORGANISM  unspecified
REFERENCE   1  (bases 1 to 336)
  AUTHORS   Keoni Gandall
  TITLE     Direct Submission
  JOURNAL   Exported Sep 12, 2023 from SnapGene 6.2.2
            https://www.snapgene.com
FEATURES             Location/Qualifiers
     source          1..336
                     /mol_type="genomic DNA"
                     /organism="unspecified"
     primer_bind     1..17
                     /label=M13 rev
                     /note="common sequencing primer, one of multiple similar
                     variants"
     CDS             13..336
                     /codon_start=1
                     /gene="lacZ"
                     /product="LacZ-alpha fragment of beta-galactosidase"
                     /label=lacZ-alpha
                     /translation="MTMITPSLHACRSTLEDPRVPSSNSLAVVLQRRDWENPGVTQLNR
                     LAAHPPFASWRNSEEARTDRPSQQLRSLNGEWRLMRYFLLTHLCGISHRIWCTLSTICS
                     DAA"
     misc_feature    30..86
                     /label=MCS
                     /note="pUC19 multiple cloning site"
     primer_bind     complement(87..103)
                     /label=M13 fwd
                     /note="common sequencing primer, one of multiple similar
                     variants"
ORIGIN
        1 caggaaacag ctatgaccat gattacgcca agcttgcatg cctgcaggtc gactctagag
       61 gatccccggg taccgagctc gaattcactg gccgtcgttt tacaacgtcg tgactgggaa
      121 aaccctggcg ttacccaact taatcgcctt gcagcacatc cccctttcgc cagctggcgt
      181 aatagcgaag aggcccgcac cgatcgccct tcccaacagt tgcgcagcct gaatggcgaa
      241 tggcgcctga tgcggtattt tctccttacg catctgtgcg gtatttcaca ccgcatatgg
      301 tgcactctca gtacaatctg ctctgatgcc gcatag
//
`)
	parser := bio.NewGenbankParser(file)
	records, _ := parser.Parse()

	fmt.Println(records[0].Features[2].Attributes["translation"])
}

Output:

[MTMITPSLHACRSTLEDPRVPSSNSLAVVLQRRDWENPGVTQLNRLAAHPPFASWRNSEEARTDRPSQQLRSLNGEWRLMRYFLLTHLCGISHRIWCTLSTICSDAA]

func NewGenbankParserWithMaxLineLength 

func NewGenbankParserWithMaxLineLength(r io.Reader, maxLineLength int) *Parser[genbank.Genbank, genbank.Header]

NewGenbankParserWithMaxLineLength initiates a new Genbank parser from an io.Reader and a user-given maxLineLength.

func NewPileupParser 

func NewPileupParser(r io.Reader) *Parser[pileup.Line, pileup.Header]

NewPileupParser initiates a new Pileup parser from an io.Reader.

Example 
package main

import (
	"fmt"
	"strings"

	"github.com/koeng101/dnadesign/lib/bio"
)

func main() {
	file := strings.NewReader(`seq1 	272 	T 	24 	,.$.....,,.,.,...,,,.,..^+. 	<<<+;<<<<<<<<<<<=<;<;7<&
seq1 	273 	T 	23 	,.....,,.,.,...,,,.,..A 	<<<;<<<<<<<<<3<=<<<;<<+
seq1 	274 	T 	23 	,.$....,,.,.,...,,,.,... 	7<7;<;<<<<<<<<<=<;<;<<6
seq1 	275 	A 	23 	,$....,,.,.,...,,,.,...^l. 	<+;9*<<<<<<<<<=<<:;<<<<
seq1 	276 	G 	22 	...T,,.,.,...,,,.,.... 	33;+<<7=7<<7<&<<1;<<6<
seq1 	277 	T 	22 	....,,.,.,.C.,,,.,..G. 	+7<;<<<<<<<&<=<<:;<<&<
seq1 	278 	G 	23 	....,,.,.,...,,,.,....^k. 	%38*<<;<7<<7<=<<<;<<<<<
seq1 	279 	C 	23 	A..T,,.,.,...,,,.,..... 	75&<<<<<<<<<=<<<9<<:<<<`)
	parser := bio.NewPileupParser(file)
	lines, _ := parser.Parse() // Parse all lines from file

	fmt.Println(lines[1].Quality)
}

Output:

<<<;<<<<<<<<<3<=<<<;<<+

func NewPileupParserWithMaxLineLength 

func NewPileupParserWithMaxLineLength(r io.Reader, maxLineLength int) *Parser[pileup.Line, pileup.Header]

NewPileupParserWithMaxLineLength initiates a new Pileup parser from an io.Reader and a user-given maxLineLength.

func NewSamParser 

func NewSamParser(r io.Reader) (*Parser[sam.Alignment, sam.Header], error)

NewSamParser initiates a new SAM parser from an io.Reader.

Example 
package main

import (
	"fmt"
	"strings"

	"github.com/koeng101/dnadesign/lib/bio"
)

func main() {
	// The following can be replaced with a any io.Reader. For example,
	// `file, err := os.Open(path)` for file would also work.
	file := strings.NewReader(`@HD	VN:1.6	SO:unsorted	GO:query
@SQ	SN:pOpen_V3_amplified	LN:2482
@PG	ID:minimap2	PN:minimap2	VN:2.24-r1155-dirty	CL:minimap2 -acLx map-ont - APX814_pass_barcode17_e229f2c8_109f9b91_0.fastq.gz
ae9a66f5-bf71-4572-8106-f6f8dbd3b799	16	pOpen_V3_amplified	1	60	8S54M1D3M1D108M1D1M1D62M226S	*	0	0	AGCATGCCGCTTTTCTGTGACTGGTGAGTACTCAACCAAGTCATTCTGAGAATAGTGTATGCGTGCTGAGTTGCTCTTGCCCGGCGTCAATACGGGATAATACCGCGCCACATAGCAGAACTTTAAAAGTGCTCATCATTGGAAAACGTTCTTCGGGGCGAAAACTCTCGACGTTTACCGCTGTTGAGATCCAGTTCGATGTAACCCACTCGTGCACCCAACTGATCTTCAGCATCAGGGCCGAGCGCAGAAGTGGTCCTGCAACTTTATCCGCCTCCATCCAGTCTATTAATTGTTGCCGGAAGCTAGAGTAAGTAGTTCGCCAGTTAATAGTTTGCGCAACGTTGTTGCCATTGCTACAGGCATCGTGGTTACTGTTGATGTTCATGTAGGTGCTGATCAGAGGTACTTTCCTGGAGGGTTTAACCTTAGCAATACGTAACGGAACGAAGTACAGGGCAT	%,<??@@{O{HS{{MOG{EHD@@=)))'&%%%%'(((6::::=?=;:7)'''/33387-)(*025557CBBDDFDECD;1+'(&&')(,-('))35@>AFDCBD{LNKKGIL{{JLKI{{IFG>==86668789=<><;056<;>=87:840/++1,++)-,-0{{&&%%&&),-13;<{HGVKCGFI{J{L{G{INJHEA@C540/3568;>EOI{{{I0000HHRJ{{{{{{{RH{N@@?AKLQEEC?==<433345588==FTA??A@G?@@@EC?==;10//2333?AB?<<<--(++*''&&-(((+@DBJQHJHGGPJH{.---@B?<''-++'--&%%&,,,FC:999IEGJ{HJHIGIFEGIFMDEF;8878{KJGFIJHIHDCAA=<<<<;DDB>:::EK{{@{E<==HM{{{KF{{{MDEQM{ECA?=>9--,.3))'')*++.-,**()%%	NM:i:8	ms:i:408	AS:i:408	nn:i:0	tp:A:P	cm:i:29	s1:i:195	s2:i:0	de:f:0.0345	SA:Z:pOpen_V3_amplified,2348,-,236S134M1D92S,60,1;	rl:i:0`)
	parser, _ := bio.NewSamParser(file)
	records, _ := parser.Parse() // Parse all data records from file

	fmt.Println(records[0].CIGAR)
}

Output:

8S54M1D3M1D108M1D1M1D62M226S

func NewSamParserWithMaxLineLength 

func NewSamParserWithMaxLineLength(r io.Reader, maxLineLength int) (*Parser[sam.Alignment, sam.Header], error)

NewSamParserWithMaxLineLength initiates a new SAM parser from an io.Reader and a user-given maxLineLength.

func NewSlow5Parser 

func NewSlow5Parser(r io.Reader) (*Parser[slow5.Read, slow5.Header], error)

NewSlow5Parser initiates a new SLOW5 parser from an io.Reader.

Example 
package main

import (
	"fmt"
	"strings"

	"github.com/koeng101/dnadesign/lib/bio"
)

func main() {
	// The following can be replaced with a any io.Reader. For example,
	// `file, err := os.Open(path)` for file would also work.
	file := strings.NewReader(`#slow5_version	0.2.0
#num_read_groups	1
@asic_id	4175987214
#char*	uint32_t	double	double	double	double	uint64_t	int16_t*	uint64_t	int32_t	uint8_t	double	enum{unknown,partial,mux_change,unblock_mux_change,data_service_unblock_mux_change,signal_positive,signal_negative}	char*
#read_id	read_group	digitisation	offset	range	sampling_rate	len_raw_signal	raw_signal	start_time	read_number	start_mux	median_before	end_reason	channel_number
0026631e-33a3-49ab-aa22-3ab157d71f8b	0	8192	16	1489.52832	4000	5347	430,472,463	8318394	5383	1	219.133423	5	10
`)
	parser, _ := bio.NewSlow5Parser(file)
	reads, _ := parser.Parse() // Parse all data records from file

	fmt.Println(reads[0].RawSignal)
}

Output:

[430 472 463]

func NewSlow5ParserWithMaxLineLength 

func NewSlow5ParserWithMaxLineLength(r io.Reader, maxLineLength int) (*Parser[slow5.Read, slow5.Header], error)

NewSlow5ParserWithMaxLineLength initiates a new SLOW5 parser from an io.Reader and a user-given maxLineLength.

func NewUniprotParser 

func NewUniprotParser(r io.Reader) *Parser[uniprot.Entry, uniprot.Header]

NewUniprotParser initiates a new Uniprot parser from an io.Reader. No maxLineLength is necessary.

Example 
package main

import (
	"fmt"
	"strings"

	"github.com/koeng101/dnadesign/lib/bio"
)

func main() {
	// The following is a real entry in Swiss-Prot. We're going to gzip it and
	// put the gzipped text as an io.Reader to mock a file. You can edit the
	// text here to see how the parser works.
	uniprotEntryText := strings.NewReader(`<entry dataset="Swiss-Prot" created="2009-05-05" modified="2020-08-12" version="9" xmlns="http://uniprot.org/uniprot">
  <accession>P0C9F0</accession>
  <name>1001R_ASFK5</name>
  <protein>
    <recommendedName>
      <fullName>Protein MGF 100-1R</fullName>
    </recommendedName>
  </protein>
  <gene>
    <name type="ordered locus">Ken-018</name>
  </gene>
  <organism>
    <name type="scientific">African swine fever virus (isolate Pig/Kenya/KEN-50/1950)</name>
    <name type="common">ASFV</name>
    <dbReference type="NCBI Taxonomy" id="561445"/>
    <lineage>
      <taxon>Viruses</taxon>
      <taxon>Varidnaviria</taxon>
      <taxon>Bamfordvirae</taxon>
      <taxon>Nucleocytoviricota</taxon>
      <taxon>Pokkesviricetes</taxon>
      <taxon>Asfuvirales</taxon>
      <taxon>Asfarviridae</taxon>
      <taxon>Asfivirus</taxon>
    </lineage>
  </organism>
  <organismHost>
    <name type="scientific">Ornithodoros</name>
    <name type="common">relapsing fever ticks</name>
    <dbReference type="NCBI Taxonomy" id="6937"/>
  </organismHost>
  <organismHost>
    <name type="scientific">Phacochoerus aethiopicus</name>
    <name type="common">Warthog</name>
    <dbReference type="NCBI Taxonomy" id="85517"/>
  </organismHost>
  <organismHost>
    <name type="scientific">Phacochoerus africanus</name>
    <name type="common">Warthog</name>
    <dbReference type="NCBI Taxonomy" id="41426"/>
  </organismHost>
  <organismHost>
    <name type="scientific">Potamochoerus larvatus</name>
    <name type="common">Bushpig</name>
    <dbReference type="NCBI Taxonomy" id="273792"/>
  </organismHost>
  <organismHost>
    <name type="scientific">Sus scrofa</name>
    <name type="common">Pig</name>
    <dbReference type="NCBI Taxonomy" id="9823"/>
  </organismHost>
  <reference key="1">
    <citation type="submission" date="2003-03" db="EMBL/GenBank/DDBJ databases">
      <title>African swine fever virus genomes.</title>
      <authorList>
        <person name="Kutish G.F."/>
        <person name="Rock D.L."/>
      </authorList>
    </citation>
    <scope>NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]</scope>
  </reference>
  <comment type="function">
    <text evidence="1">Plays a role in virus cell tropism, and may be required for efficient virus replication in macrophages.</text>
  </comment>
  <comment type="similarity">
    <text evidence="2">Belongs to the asfivirus MGF 100 family.</text>
  </comment>
  <dbReference type="EMBL" id="AY261360">
    <property type="status" value="NOT_ANNOTATED_CDS"/>
    <property type="molecule type" value="Genomic_DNA"/>
  </dbReference>
  <dbReference type="Proteomes" id="UP000000861">
    <property type="component" value="Genome"/>
  </dbReference>
  <proteinExistence type="inferred from homology"/>
  <feature type="chain" id="PRO_0000373170" description="Protein MGF 100-1R">
    <location>
      <begin position="1"/>
      <end position="122"/>
    </location>
  </feature>
  <evidence type="ECO:0000250" key="1"/>
  <evidence type="ECO:0000305" key="2"/>
  <sequence length="122" mass="14969" checksum="C5E63C34B941711C" modified="2009-05-05" version="1">MVRLFYNPIKYLFYRRSCKKRLRKALKKLNFYHPPKECCQIYRLLENAPGGTYFITENMTNELIMIAKDPVDKKIKSVKLYLTGNYIKINQHYYINIYMYLMRYNQIYKYPLICFSKYSKIL</sequence>
</entry>`)
	// Now we load the parser, and get the first entry out.
	parser := bio.NewUniprotParser(uniprotEntryText)
	entry, _ := parser.Next()

	fmt.Println(entry.Accession[0])
}

Output:

P0C9F0

func (*Parser[Data, Header]) Header 

func (p *Parser[Data, Header]) Header() (Header, error)

Header is a parsing primitive that should be used when low-level control is needed. It returns the header of the parser, which is usually parsed prior to the parser being returned by the "NewXXXParser" functions. Unlike the Next() function, Header() can be called as many times as needed. Sometimes files have useful headers, while other times they do not.

The following file formats do not have a useful header: 

FASTA
FASTQ
Pileup

The following file formats do have a useful header: 

SLOW5

func (*Parser[Data, Header]) Next 

func (p *Parser[Data, Header]) Next() (Data, error)

Next is a parsing primitive that should be used when low-level control is needed. It returns the next record/read/line from the parser. On EOF, it returns an io.EOF error, though the returned FASTA/FASTQ/SLOW5/Pileup may or may not be nil, depending on where the io.EOF is. This should be checked by downstream software. Next can only be called as many times as there are records in a file, as the parser reads the underlying io.Reader in a straight line.

func (*Parser[Data, Header]) Parse 

func (p *Parser[Data, Header]) Parse() ([]Data, error)

Parse returns all records/reads/lines from the parser, but does not include the header. It can only be called once on a given parser because it will read all the input from the underlying io.Reader before exiting.

func (*Parser[Data, Header]) ParseN 

func (p *Parser[Data, Header]) ParseN(countN int) ([]Data, error)

ParseN returns a countN number of records/reads/lines from the parser.

func (*Parser[DataTypes, HeaderTypes]) ParseToChannel 

func (p *Parser[DataTypes, HeaderTypes]) ParseToChannel(ctx context.Context, channel chan<- DataTypes, keepChannelOpen bool) error

ParseToChannel pipes all records/reads/lines from a parser into a channel, then optionally closes that channel. If parsing a single file, "keepChannelOpen" should be set to false, which will close the channel once parsing is complete. If many files are being parsed to a single channel, keepChannelOpen should be set to true, so that an external function will close channel once all are done parsing.

Context can be used to close the parser in the middle of parsing - for example, if an error is found in another parser elsewhere and all files need to close.

Example 
package main

import (
	"context"
	"fmt"
	"strings"

	"github.com/koeng101/dnadesign/lib/bio"
	"github.com/koeng101/dnadesign/lib/bio/fasta"
)

func main() {
	// The following can be replaced with a any io.Reader. For example,
	// `file, err := os.Open(path)` for file would also work.
	file := strings.NewReader(`>gi|5524211|gb|AAD44166.1| cytochrome b [Elephas maximus maximus]
LCLYTHIGRNIYYGSYLYSETWNTGIMLLLITMATAFMGYVLPWGQMSFWGATVITNLFSAIPYIGTNLV
EWIWGGFSVDKATLNRFFAFHFILPFTMVALAGVHLTFLHETGSNNPLGLTSDSDKIPFHPYYTIKDFLG
LLILILLLLLLALLSPDMLGDPDNHMPADPLNTPLHIKPEWYFLFAYAILRSVPNKLGGVLALFLSIVIL
GLMPFLHTSKHRSMMLRPLSQALFWTLTMDLLTLTWIGSQPVEYPYTIIGQMASILYFSIILAFLPIAGX
IENY

>MCHU - Calmodulin - Human, rabbit, bovine, rat, and chicken
ADQLTEEQIAEFKEAFSLFDKDGDGTITTKELGTVMRSLGQNPTEAELQDMINEVDADGNGTID
FPEFLTMMARKMKDTDSEEEIREAFRVFDKDGNGYISAAELRHVMTNLGEKLTDEEVDEMIREA
DIDGDGQVNYEEFVQMMTAK*`)
	parser := bio.NewFastaParser(file)

	channel := make(chan fasta.Record)
	ctx := context.Background()
	go func() { _ = parser.ParseToChannel(ctx, channel, false) }()

	var records []fasta.Record
	for record := range channel {
		records = append(records, record)
	}

	fmt.Println(records[1].Sequence)
}

Output:

ADQLTEEQIAEFKEAFSLFDKDGDGTITTKELGTVMRSLGQNPTEAELQDMINEVDADGNGTIDFPEFLTMMARKMKDTDSEEEIREAFRVFDKDGNGYISAAELRHVMTNLGEKLTDEEVDEMIREADIDGDGQVNYEEFVQMMTAK*

func (*Parser[Data, Header]) ParseWithHeader 

func (p *Parser[Data, Header]) ParseWithHeader() ([]Data, Header, error)

ParseWithHeader returns all records/reads/lines, plus the header, from the parser. It can only be called once on a given parser because it will read all the input from the underlying io.Reader before exiting.

Example 
package main

import (
	"fmt"
	"strings"

	"github.com/koeng101/dnadesign/lib/bio"
)

func main() {
	// The following can be replaced with a any io.Reader. For example,
	// `file, err := os.Open(path)` for file would also work.
	file := strings.NewReader(`#slow5_version	0.2.0
#num_read_groups	1
@asic_id	4175987214
#char*	uint32_t	double	double	double	double	uint64_t	int16_t*	uint64_t	int32_t	uint8_t	double	enum{unknown,partial,mux_change,unblock_mux_change,data_service_unblock_mux_change,signal_positive,signal_negative}	char*
#read_id	read_group	digitisation	offset	range	sampling_rate	len_raw_signal	raw_signal	start_time	read_number	start_mux	median_before	end_reason	channel_number
0026631e-33a3-49ab-aa22-3ab157d71f8b	0	8192	16	1489.52832	4000	5347	430,472,463	8318394	5383	1	219.133423	5	10
`)
	parser, _ := bio.NewSlow5Parser(file)
	reads, header, _ := parser.ParseWithHeader() // Parse all data records from file

	fmt.Printf("%s, %s\n", header.HeaderValues[0].Slow5Version, reads[0].ReadID)
}

Output:

0.2.0, 0026631e-33a3-49ab-aa22-3ab157d71f8b

type ParserInterface 

type ParserInterface[Data DataTypes, Header HeaderTypes] interface {
	Header() (Header, error)
	Next() (Data, error) // Returns io.EOF on end of file
}

ParserInterface is a generic interface that all parsers must support. It is very simple, only requiring two functions, Header() and Next(). Header() returns the header of the file if there is one: most files, like fasta, fastq, and pileup do not contain headers, while others like sam and slow5 do have headers. Next() returns a record/read/line from the file format, and terminates on an io.EOF error.

Next() terminates at io.EOF with an empty Data struct.

type WorkerFunc 

type WorkerFunc func(ctx context.Context) error

WorkerFunc defines the type of function that will be run by each worker. It should take a context as its argument for cancellation and coordination.

Source Files

View all Source files

Directories

Path Synopsis
Package fasta contains fasta parsers and writers.
 Package fasta contains fasta parsers and writers.
Package fastq contains fastq parsers and writers.
 Package fastq contains fastq parsers and writers.
Package genbank provides genbank parsers and writers.
 Package genbank provides genbank parsers and writers.
Package pileup contains pileup parsers and writers.
 Package pileup contains pileup parsers and writers.
Package rebase contains a rebase parser for rebase data dump #31.
 Package rebase contains a rebase parser for rebase data dump #31.
Package sam implements a SAM file parser and writer.
 Package sam implements a SAM file parser and writer.
Package slow5 contains slow5 parsers and writers.
 Package slow5 contains slow5 parsers and writers.
svb
svb/cpuid
Package cpuid provides access to the information available through the CPUID instruction.
 Package cpuid provides access to the information available through the CPUID instruction.
svb/cpuid/example
Package uniprot provides an XML parser for Uniprot data dumps.
 Package uniprot provides an XML parser for Uniprot data dumps.

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