                                  degapseq



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Function

   Remove non-alphabetic (e.g. gap) characters from sequences

Description

   degapseq reads one or more sequences and writes them out again but
   stripped of any non-alphabetic characters. It's main purpose is to
   remove gap characters from aligned sequences, but it will also remove
   such things as the symbol for translation STOP ('*') in a protein
   sequence.

Usage

   Here is a sample session with degapseq


% degapseq dnagap.fasta nogaps.seq
Remove non-alphabetic (e.g. gap) characters from sequences


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

Command line arguments

Remove non-alphabetic (e.g. gap) characters from sequences
Version: EMBOSS:6.5.6.0

   Standard (Mandatory) qualifiers:
  [-sequence]          seqall     (Gapped) sequence(s) filename and optional
                                  format, or reference (input USA)
  [-outseq]            seqoutall  [.] Sequence set(s)
                                  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
   -scircular1         boolean    Sequence is circular
   -sformat1           string     Input sequence format
   -iquery1            string     Input query fields or ID list
   -ioffset1           integer    Input start position offset
   -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


Input file format

   degapseq reads one or more nucleotide 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: dnagap.fasta

>FASTA F10002 FASTA FORMAT DNA SEQUENCE
ACGT....ACGTACGTACGTACGTACGTACGTACGTACGT
ACGTACGTACGTACGTACGTACGTACGTACGTACGTACGT
ACGTACGTACGTACGTACGT

Output file format

   The output is a sequence with no gaps.

  Output files for usage example

  File: nogaps.seq

>FASTA F10002 FASTA FORMAT DNA SEQUENCE
ACGTACGTACGTACGTACGTACGTACGTACGTACGTACGTACGTACGTACGTACGTACGT
ACGTACGTACGTACGTACGTACGTACGTACGTACGT

Data files

   None.

Notes

   There are many different formats for storing molecular sequences in
   files. Some formats are specifically for aligned sequences, where gaps
   are inserted into the sequences for purposes of alignment. Gaps are
   indicated with different characters depending on the format in
   question, but commonly include '.', '-' and '~'. Some formats use more
   than one type of character to indicate different types of gaps, for
   example gaps at the sequence ends, internal gaps, gaps inserted by a
   program and gaps inserted manually by a person editing the alignment
   may all be denoted with different characters.

   EMBOSS uses the dash character ('-') only to indicate gaps. When an
   EMBOSS program reads a sequence with gaps, all gap characters are
   changed internally to a dash ('-'). Thus any distinguishing characters
   for different gap types are convered to a '-' on output.

References

   None.

Warnings

   It will remove '*' characters from protein sequences as well as
   removing the gap characters.

Diagnostic Error Messages

   None.

Exit status

   It always exits with status 0.

Known bugs

   None.

See also

   Program name     Description
   aligncopy        Read and write alignments
   aligncopypair    Read and write pairs from alignments
   biosed           Replace or delete sequence sections
   codcopy          Copy and reformat a codon usage table
   cutseq           Remove a section from a sequence
   descseq          Alter the name or description of a sequence
   entret           Retrieve 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         Read and write a feature table
   featmerge        Merge two overlapping feature tables
   featreport       Read and write 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     Mask all ambiguity characters in nucleotide sequences with
                    N
   maskambigprot    Mask 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
   nthseq           Write to file a single sequence from an input stream of
                    sequences
   nthseqset        Read and write (return) one set of sequences from many
   pasteseq         Insert one sequence into another
   revseq           Reverse and complement a nucleotide sequence
   seqcount         Read and count sequences
   seqret           Read and write (return) sequences
   seqretsetall     Read and write (return) many sets of sequences
   seqretsplit      Read sequences and write them to individual files
   sizeseq          Sort sequences by size
   skipredundant    Remove redundant sequences from an input set
   skipseq          Read and write (return) 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      Remove vectors from the ends of nucleotide sequence(s)
   yank             Add a sequence reference (a full USA) to a list file

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 (c) emboss.open-bio.org) not to the original author.

History

   Written (6 March 2001) - Gary Williams

Target users

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

Comments

   None
