
                                 degapseq 



Function

   Removes 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 
Removes 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

   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
   -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. 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

Input file format

   Any valid input sequence USA is allowed.

   The input sequence can be nucleic or protein.

   The input sequence can be gapped or ungapped.

  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 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
   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
   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 all 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
   pasteseq Insert one sequence into another
   revseq Reverse and complement a nucleotide sequence
   seqret Reads and writes (returns) 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
   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

Author(s)

   Gary Williams (gwilliam © rfcgr.mrc.ac.uk)
   MRC Rosalind Franklin Centre for Genomics Research Wellcome Trust
   Genome Campus, Hinxton, Cambridge, CB10 1SB, UK

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
