CSC

 
 
Tehdyt toimenpiteet
EMBOSS: nthseq
nthseq

 

Wiki

The master copies of EMBOSS documentation are available at http://emboss.open-bio.org/wiki/Appdocs on the EMBOSS Wiki.

Please help by correcting and extending the Wiki pages.

Function

Write to file a single sequence from an input stream of sequences

Description

nthseq writes to file a single sequence from an input stream of sequences. The sequence is specified by number, which is the order it appears in the input file. The output file name may be specified.

Usage

Here is a sample session with nthseq 


% nthseq 
Write to file a single sequence from an input stream of sequences
Input (gapped) sequence(s): @eclac.list
The number of the sequence to output [1]: 2
output sequence [j01636.fasta]:

Go to the input files for this example
Go to the output files for this example

Command line arguments 

Write to file a single sequence from an input stream of sequences
Version: EMBOSS:6.4.0.0

   Standard (Mandatory) qualifiers:
  [-sequence]          seqall     (Gapped) sequence(s) filename and optional
                                  format, or reference (input USA)
   -number             integer    [1] The number of the sequence to output
                                  (Integer 1 or more)
  [-outseq]            seqout     [.] Sequence filename and
                                  optional format (output USA)

   Additional (Optional) qualifiers: (none)
   Advanced (Unprompted) qualifiers: (none)
   Associated qualifiers:

   "-sequence" associated qualifiers
   -sbegin1            integer    Start of each sequence to be used
   -send1              integer    End of each sequence to be used
   -sreverse1          boolean    Reverse (if DNA)
   -sask1              boolean    Ask for begin/end/reverse
   -snucleotide1       boolean    Sequence is nucleotide
   -sprotein1          boolean    Sequence is protein
   -slower1            boolean    Make lower case
   -supper1            boolean    Make upper case
   -sformat1           string     Input sequence format
   -sdbname1           string     Database name
   -sid1               string     Entryname
   -ufo1               string     UFO features
   -fformat1           string     Features format
   -fopenfile1         string     Features file name

   "-outseq" associated qualifiers
   -osformat2          string     Output seq format
   -osextension2       string     File name extension
   -osname2            string     Base file name
   -osdirectory2       string     Output directory
   -osdbname2          string     Database name to add
   -ossingle2          boolean    Separate file for each entry
   -oufo2              string     UFO features
   -offormat2          string     Features format
   -ofname2            string     Features file name
   -ofdirectory2       string     Output directory

   General qualifiers:
   -auto               boolean    Turn off prompts
   -stdout             boolean    Write first file to standard output
   -filter             boolean    Read first file from standard input, write
                                  first file to standard output
   -options            boolean    Prompt for standard and additional values
   -debug              boolean    Write debug output to program.dbg
   -verbose            boolean    Report some/full command line options
   -help               boolean    Report command line options and exit. More
                                  information on associated and general
                                  qualifiers can be found with -help -verbose
   -warning            boolean    Report warnings
   -error              boolean    Report errors
   -fatal              boolean    Report fatal errors
   -die                boolean    Report dying program messages
   -version            boolean    Report version number and exit

Qualifier Type Description Allowed values Default
Standard (Mandatory) qualifiers
[-sequence]
(Parameter 1)		 seqall (Gapped) sequence(s) filename and optional format, or reference (input USA) Readable sequence(s) Required
-number integer The number of the sequence to output Integer 1 or more 1
[-outseq]
(Parameter 2)		 seqout Sequence filename and optional format (output USA) Writeable sequence <*>.format
Additional (Optional) qualifiers
(none)
Advanced (Unprompted) qualifiers
(none)
Associated qualifiers
"-sequence" associated seqall qualifiers
-sbegin1
-sbegin_sequence		 integer Start of each sequence to be used Any integer value 0
-send1
-send_sequence		 integer End of each sequence to be used Any integer value 0
-sreverse1
-sreverse_sequence		 boolean Reverse (if DNA) Boolean value Yes/No N
-sask1
-sask_sequence		 boolean Ask for begin/end/reverse Boolean value Yes/No N
-snucleotide1
-snucleotide_sequence		 boolean Sequence is nucleotide Boolean value Yes/No N
-sprotein1
-sprotein_sequence		 boolean Sequence is protein Boolean value Yes/No N
-slower1
-slower_sequence		 boolean Make lower case Boolean value Yes/No N
-supper1
-supper_sequence		 boolean Make upper case Boolean value Yes/No N
-sformat1
-sformat_sequence		 string Input sequence format Any string  
-sdbname1
-sdbname_sequence		 string Database name Any string  
-sid1
-sid_sequence		 string Entryname Any string  
-ufo1
-ufo_sequence		 string UFO features Any string  
-fformat1
-fformat_sequence		 string Features format Any string  
-fopenfile1
-fopenfile_sequence		 string Features file name Any string  
"-outseq" associated seqout qualifiers
-osformat2
-osformat_outseq		 string Output seq format Any string  
-osextension2
-osextension_outseq		 string File name extension Any string  
-osname2
-osname_outseq		 string Base file name Any string  
-osdirectory2
-osdirectory_outseq		 string Output directory Any string  
-osdbname2
-osdbname_outseq		 string Database name to add Any string  
-ossingle2
-ossingle_outseq		 boolean Separate file for each entry Boolean value Yes/No N
-oufo2
-oufo_outseq		 string UFO features Any string  
-offormat2
-offormat_outseq		 string Features format Any string  
-ofname2
-ofname_outseq		 string Features file name Any string  
-ofdirectory2
-ofdirectory_outseq		 string Output directory Any string  
General qualifiers
-auto boolean Turn off prompts Boolean value Yes/No N
-stdout boolean Write first file to standard output Boolean value Yes/No N
-filter boolean Read first file from standard input, write first file to standard output Boolean value Yes/No N
-options boolean Prompt for standard and additional values Boolean value Yes/No N
-debug boolean Write debug output to program.dbg Boolean value Yes/No N
-verbose boolean Report some/full command line options Boolean value Yes/No Y
-help boolean Report command line options and exit. More information on associated and general qualifiers can be found with -help -verbose Boolean value Yes/No N
-warning boolean Report warnings Boolean value Yes/No Y
-error boolean Report errors Boolean value Yes/No Y
-fatal boolean Report fatal errors Boolean value Yes/No Y
-die boolean Report dying program messages Boolean value Yes/No Y
-version boolean Report version number and exit Boolean value Yes/No N

Input file format

nthseq reads one or more nucleotiode or protein sequences.

The input is a standard EMBOSS sequence query (also known as a 'USA').

Major sequence database sources defined as standard in EMBOSS installations include srs:embl, srs:uniprot and ensembl

Data can also be read from sequence output in any supported format written by an EMBOSS or third-party application.

The input format can be specified by using the command-line qualifier -sformat xxx, where 'xxx' is replaced by the name of the required format. The available format names are: gff (gff3), gff2, embl (em), genbank (gb, refseq), ddbj, refseqp, pir (nbrf), swissprot (swiss, sw), dasgff and debug.

See: http://emboss.sf.net/docs/themes/SequenceFormats.html for further information on sequence formats.

Input files for usage example

File: eclac.list

#Formerly ECLAC
tembl:J01636

#Formerly ECLACA
tembl:X51872

#Formerly ECLACI
tembl:V00294

#Formerly ECLACY
tembl:V00295

#Formerly ECLACZ
tembl:V00296

Output file format

The output is a standard EMBOSS sequence file.

The results can be output in one of several styles by using the command-line qualifier -osformat xxx, where 'xxx' is replaced by the name of the required format. The available format names are: embl, genbank, gff, pir, swiss, dasgff, debug, listfile, dbmotif, diffseq, excel, feattable, motif, nametable, regions, seqtable, simple, srs, table, tagseq.

See: http://emboss.sf.net/docs/themes/SequenceFormats.html for further information on sequence formats.

The output is the specified ordinal sequence from the input USA.

In the example, the second sequence from the input file will be written out to the specified output file.

Output files for usage example

File: j01636.fasta

>X51872 X51872.1 Escherichia coli lacA gene for thiogalactoside transacetylase
gtgaatgaagtcgcttaagcaatcaatgtcggatgcggcgcgacgcttatccgaccaaca
tatcataacggagtgatcgcattgaacatgccaatgaccgaaagaataagagcaggcaag
ctatttaccgatatgtgcgaaggcttaccggaaaaaagacttcgtgggaaaacgttaatg
tatgagtttaatcactcgcatccatcagaagttgaaaaaagagaaagcctgattaaagaa
atgtttgccacggtaggggaaaacgcctgggtagaaccgcctgtctatttctcttacggt
tccaacatccatataggccgcaatttttatgcaaatttcaatttaaccattgtcgatgac
tacacggtaacaatcggtgataacgtactgattgcacccaacgttactctttccgttacg
ggacaccctgtacaccatgaattgagaaaaaacggcgagatgtactcttttccgataacg
attggcaataacgtctggatcggaagtcatgtggttattaatccaggcgtcaccatcggg
gataattctgttattggcgcgggtagtatcgtcacaaaagacattccaccaaacgtcgtg
gcggctggcgttccttgtcgggttattcgcgaaataaacgaccgggataagcactattat
ttcaaagattataaagttgaatcgtcagtttaaattataaaaattgcctgatacgctgcg
cttatcaggcctacaagttcagcgatctacattagccgcatccggcatgaacaaagcgca
ggaacaagcgtcgcatcatgcctctttgacccacagctgcggaaaacgtactggtgcaaa
acgcagggttatgatcatcagcccaacgacgcacagcgcatgaaatgcccagtccatcag
gtaattgccgctgatactacgcagcacgccagaaaaccacggggcaagcccggcgatgat
aaaaccgattccctgcataaacgccaccagcttgccagcaatagccggttgcacagagtg
atcgagcgccagcagcaaacagagcggaaacgcgccgcccagacctaacccacacaccat
cgcccacaataccggcaattgcatcggcagccagataaagccgcagaaccccaccagttg
taacaccagcgccagcattaacagtttgcgccgatcctgatggcgagccatagcaggcat
cagcaaagctcctgcggcttgcccaagcgtcatcaatgccagtaaggaaccgctgtactg
cgcgctggcaccaatctcaatatagaaagcgggtaaccaggcaatcaggctggcgtaacc
gccgttaatcagaccgaagtaaacacccagcgtccacgcgcggggagtgaataccacgcg
aaccggagtggttgttgtcttgtgggaagaggcgacctcgcgggcgctttgccaccacca
ggcaaagagcgcaacaacggcaggcagcgccaccaggcgagtgtttgataccaggtttcg
ctatgttgaactaaccagggcgttatggcggcaccaagcccaccgccgcccatcagagcc
gcggaccacagccccatcaccagtggcgtgcgctgctgaaaccgccgtttaatcaccgaa
gcatcaccgcctgaatgatgccgatccccaccccaccaagcagtgcgctgctaagcagca
gcgcactttgcgggtaaagctcacgcatcaatgcaccgacggcaatcagcaacagactga
tggcgacactgcgacgttcgctgacatgctgatgaagccagcttccggccagcgccagcc
cgcccatggtaaccaccggcagagcggtcgac

Data files

None.

Notes

In EMBOSS, when an application has to write out many sequences, they are typically all written to a single file. This default behaviour can be changed by using the qualifier -ossingle which forces each sequence to be written to its own file.

The program seqretsplit will take a file containing many sequences and will output many files, each containing one sequence. However you have no choice over the naming of the files - they are named after the ID name fo the sequence they contain.

It may be useful to use this application in a small script that extracts all sequences from a multiple sequence file and explicitly names the output files in the way that you require.

For example: 

#!/usr/local/bin/perl -w
if ($#ARGV !=1) {
  die "Usage: scriptname in out\n";
}
$count=1;
@list = `infoseq $ARGV[0] -auto -only -name`;
while ($count <= $#list+1) {
  system("nthseq -auto $ARGV[0] -n $count $ARGV[1]-$count.seq");
  $count++;
}

References

None.

Warnings

None.

Diagnostic Error Messages

None.

Exit status

It always exits with a status of 0.

Known bugs

None.

See also

Program name Description
aligncopy Reads and writes alignments
aligncopypair Reads and writes pairs from alignments
biosed Replace or delete sequence sections
codcopy Copy and reformat a codon usage table
cutseq Removes a section from a sequence
degapseq Removes non-alphabetic (e.g. gap) characters from sequences
descseq Alter the name or description of a sequence
entret Retrieves sequence entries from flatfile databases and files
extractalign Extract regions from a sequence alignment
extractfeat Extract features from sequence(s)
extractseq Extract regions from a sequence
featcopy Reads and writes a feature table
featreport Reads and writes a feature table
feattext Return a feature table original text
listor Write a list file of the logical OR of two sets of sequences
makenucseq Create random nucleotide sequences
makeprotseq Create random protein sequences
maskambignuc Masks all ambiguity characters in nucleotide sequences with N
maskambigprot Masks all ambiguity characters in protein sequences with X
maskfeat Write a sequence with masked features
maskseq Write a sequence with masked regions
newseq Create a sequence file from a typed-in sequence
nohtml Remove mark-up (e.g. HTML tags) from an ASCII text file
noreturn Remove carriage return from ASCII files
nospace Remove whitespace from an ASCII text file
notab Replace tabs with spaces in an ASCII text file
notseq Write to file a subset of an input stream of sequences
nthseqset Reads and writes (returns) one set of sequences from many
pasteseq Insert one sequence into another
revseq Reverse and complement a nucleotide sequence
seqcount Reads and counts sequences
seqret Reads and writes (returns) sequences
seqretsetall Reads and writes (returns) many sets of sequences
seqretsplit Reads sequences and writes them to individual files
sizeseq Sort sequences by size
skipredundant Remove redundant sequences from an input set
skipseq Reads and writes (returns) sequences, skipping first few
splitsource Split sequence(s) into original source sequences
splitter Split sequence(s) into smaller sequences
trimest Remove poly-A tails from nucleotide sequences
trimseq Remove unwanted characters from start and end of sequence(s)
trimspace Remove extra whitespace from an ASCII text file
union Concatenate multiple sequences into a single sequence
vectorstrip Removes vectors from the ends of nucleotide sequence(s)
yank Add a sequence reference (a full USA) to a list file

The program seqretsplit will take a file containing many sequences and will output many files, each containing one sequence. However you have no choice over the naming of the files - they are named after the ID name fo the sequence they contain.

Author(s)

Gary Williams formerly at:
MRC Rosalind Franklin Centre for Genomics Research Wellcome Trust Genome Campus, Hinxton, Cambridge, CB10 1SB, UK

Please report all bugs to the EMBOSS bug team (emboss-bug © emboss.open-bio.org) not to the original author.

History

Written (2000) - Gary Williams

Target users

This program is intended to be used by everyone and everything, from naive users to embedded scripts.

Comments

None