
                                  trimseq 



Function

   Trim ambiguous bits off the ends of sequences

Description

   This program is used to tidy up the ends of sequences, removing all
   the bits that you would really rather were not published.

   Specifically, it:
     * removes all gap characters from the ends.
     * removes X's and N's (in nucleic sequences) from the ends.
     * optionally removes *'s from the ends
     * optionally removes IUPAC ambiguity codes from the ends (B and Z in
       proteins, M,R,W,S,Y,K,V,H,D and B in nucleic sequences)

   It then optionally trims off poor quality regions from the end, using
   a threshold percentage of unwanted characters in a window which is
   moved along the sequence from the ends. The unwanted characters which
   are used are X's and N's (in nucleic sequences), optionally *'s, and
   optionally IUPAC ambiguity codes.

   The program stops trimming the ends when the percentage of unwanted
   characters in the moving window drops below the threshold percentage.

   Thus if the window size is set to 1 and the percentage threshold is
   100, no further poor quality regions will be removed. If the window
   size is set to 5 and the percentage threshold is 40 then the sequence
   AAGCTNNNNATT will be trimmed to AAGCT, while AAGCTNATT or
   AAGCTNNNNATTT will not be trimmed as less than 40% of the last 5
   characters are N's.

   After trimming these poor quality regions, it will again then trim off
   any dangling gap characters from the ends .

Usage

   Here is a sample session with trimseq


% trimseq tembl:hsfau hsfau.seq -window 1 -percent 100 
Trim ambiguous bits off the ends of sequences

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

   Example 2


% trimseq tembl:hsfau hsfau.seq -window 5 -percent 40 
Trim ambiguous bits off the ends of sequences

   Example 3


% trimseq tembl:hsfau hsfau.seq -window 20 -percent 80 
Trim ambiguous bits off the ends of sequences

   Example 4


% trimseq tembl:hsfau hsfau.seq -window 20 -percent 10 
Trim ambiguous bits off the ends of sequences

   Example 5


% trimseq tembl:hsfau hsfau.seq -window 20 -percent 50 -strict 
Trim ambiguous bits off the ends of sequences

   Example 6


% trimseq tembl:hsfau hsfau.seq -window 1 -percent 100 -star 
Trim ambiguous bits off the ends of sequences

   Example 7


% trimseq tembl:hsfau hsfau.seq -window 20 -percent 50 -noright 
Trim ambiguous bits off the ends of sequences

Command line arguments

   Standard (Mandatory) qualifiers:
  [-sequence]          seqall     Sequence database USA
  [-outseq]            seqoutall  Output sequence(s) USA

   Additional (Optional) qualifiers:
   -window             integer    This determines the size of the region that
                                  is considered when deciding whether the
                                  percentage of ambiguity is greater than the
                                  threshold. A value of 5 means that a region
                                  of 5 letters in the sequence is shifted
                                  along the sequence from the ends and
                                  trimming is done only if there is a greater
                                  or equal percentage of ambiguity than the
                                  threshold percentage.
   -percent            float      This is the threshold of the percentage
                                  ambiguity in the window required in order to
                                  trim a sequence.
   -strict             boolean    In nucleic sequences, trim off not only N's
                                  and X's, but also the nucleotide IUPAC
                                  ambiguity codes M, R, W, S, Y, K, V, H, D
                                  and B. In protein sequences, trim off not
                                  only X's but also B and Z.
   -star               boolean    In protein sequences, trim off not only X's,
                                  but also the *'s

   Advanced (Unprompted) qualifiers:
   -[no]left           boolean    Trim at the start
   -[no]right          boolean    Trim at the end

   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 standard output
   -filter              boolean    Read standard input, write 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 deaths


   Standard (Mandatory) qualifiers Allowed values Default
   [-sequence]
   (Parameter 1) Sequence database USA Readable sequence(s) Required
   [-outseq]
   (Parameter 2) Output sequence(s) USA Writeable sequence(s)
   <sequence>.format
   Additional (Optional) qualifiers Allowed values Default
   -window This determines the size of the region that is considered when
   deciding whether the percentage of ambiguity is greater than the
   threshold. A value of 5 means that a region of 5 letters in the
   sequence is shifted along the sequence from the ends and trimming is
   done only if there is a greater or equal percentage of ambiguity than
   the threshold percentage. Any integer value 1
   -percent This is the threshold of the percentage ambiguity in the
   window required in order to trim a sequence. Any numeric value 100.0
   -strict In nucleic sequences, trim off not only N's and X's, but also
   the nucleotide IUPAC ambiguity codes M, R, W, S, Y, K, V, H, D and B.
   In protein sequences, trim off not only X's but also B and Z. Boolean
   value Yes/No No
   -star In protein sequences, trim off not only X's, but also the *'s
   Boolean value Yes/No No
   Advanced (Unprompted) qualifiers Allowed values Default
   -[no]left Trim at the start Boolean value Yes/No Yes
   -[no]right Trim at the end Boolean value Yes/No Yes

Input file format

   Normal sequence.

  Input files for usage example

   'tembl:hsfau' is a sequence entry in the example nucleic acid database
   'tembl'

  Database entry: tembl:hsfau

ID   HSFAU      standard; RNA; HUM; 518 BP.
XX
AC   X65923;
XX
SV   X65923.1
XX
DT   13-MAY-1992 (Rel. 31, Created)
DT   23-SEP-1993 (Rel. 37, Last updated, Version 10)
XX
DE   H.sapiens fau mRNA
XX
KW   fau gene.
XX
OS   Homo sapiens (human)
OC   Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia
;
OC   Eutheria; Primates; Catarrhini; Hominidae; Homo.
XX
RN   [1]
RP   1-518
RA   Michiels L.M.R.;
RT   ;
RL   Submitted (29-APR-1992) to the EMBL/GenBank/DDBJ databases.
RL   L.M.R. Michiels, University of Antwerp, Dept of Biochemistry,
RL   Universiteisplein 1, 2610 Wilrijk, BELGIUM
XX
RN   [2]
RP   1-518
RX   MEDLINE; 93368957.
RA   Michiels L., Van der Rauwelaert E., Van Hasselt F., Kas K., Merregaert J.;
RT   " fau cDNA encodes a ubiquitin-like-S30 fusion protein and is expressed as
RT   an antisense sequences in the Finkel-Biskis-Reilly murine sarcoma virus";
RL   Oncogene 8:2537-2546(1993).
XX
DR   SWISS-PROT; P35544; UBIM_HUMAN.
DR   SWISS-PROT; Q05472; RS30_HUMAN.
XX
FH   Key             Location/Qualifiers
FH
FT   source          1..518
FT                   /chromosome="11q"
FT                   /db_xref="taxon:9606"
FT                   /organism="Homo sapiens"
FT                   /tissue_type="placenta"
FT                   /clone_lib="cDNA"
FT                   /clone="pUIA 631"
FT                   /map="13"
FT   misc_feature    57..278
FT                   /note="ubiquitin like part"
FT   CDS             57..458
FT                   /db_xref="SWISS-PROT:P35544"
FT                   /db_xref="SWISS-PROT:Q05472"
FT                   /gene="fau"
FT                   /protein_id="CAA46716.1"
FT                   /translation="MQLFVRAQELHTFEVTGQETVAQIKAHVASLEGIAPEDQVVLLA
G
FT                   APLEDEATLGQCGVEALTTLEVAGRMLGGKVHGSLARAGKVRGQTPKVAKQEKKKKKT
G
FT                   RAKRRMQYNRRFVNVVPTFGKKKGPNANS"
FT   misc_feature    98..102
FT                   /note="nucleolar localization signal"
FT   misc_feature    279..458
FT                   /note="S30 part"
FT   polyA_signal    484..489
FT   polyA_site      509
XX
SQ   Sequence 518 BP; 125 A; 139 C; 148 G; 106 T; 0 other;
     ttcctctttc tcgactccat cttcgcggta gctgggaccg ccgttcagtc gccaatatgc        6
0
     agctctttgt ccgcgcccag gagctacaca ccttcgaggt gaccggccag gaaacggtcg       12
0
     cccagatcaa ggctcatgta gcctcactgg agggcattgc cccggaagat caagtcgtgc       18
0
     tcctggcagg cgcgcccctg gaggatgagg ccactctggg ccagtgcggg gtggaggccc       24
0
     tgactaccct ggaagtagca ggccgcatgc ttggaggtaa agttcatggt tccctggccc       30
0
     gtgctggaaa agtgagaggt cagactccta aggtggccaa acaggagaag aagaagaaga       36
0
     agacaggtcg ggctaagcgg cggatgcagt acaaccggcg ctttgtcaac gttgtgccca       42
0
     cctttggcaa gaagaagggc cccaatgcca actcttaagt cttttgtaat tctggctttc       48
0
     tctaataaaa aagccactta gttcagtcaa aaaaaaaa                               51
8
//

Output file format

   Normal sequence file.

  Output files for usage example

  File: hsfau.seq

>HSFAU X65923.1 H.sapiens fau mRNA
ttcctctttctcgactccatcttcgcggtagctgggaccgccgttcagtcgccaatatgc
agctctttgtccgcgcccaggagctacacaccttcgaggtgaccggccaggaaacggtcg
cccagatcaaggctcatgtagcctcactggagggcattgccccggaagatcaagtcgtgc
tcctggcaggcgcgcccctggaggatgaggccactctgggccagtgcggggtggaggccc
tgactaccctggaagtagcaggccgcatgcttggaggtaaagttcatggttccctggccc
gtgctggaaaagtgagaggtcagactcctaaggtggccaaacaggagaagaagaagaaga
agacaggtcgggctaagcggcggatgcagtacaaccggcgctttgtcaacgttgtgccca
cctttggcaagaagaagggccccaatgccaactcttaagtcttttgtaattctggctttc
tctaataaaaaagccacttagttcagtcaaaaaaaaaa

Data files

   None.

Notes

   If you use the '-star' qualifier and set the window size to greater
   than 1, you may trim bits of sequence with internal *'s. This may not
   be what you expected.

References

   None.

Warnings

   None.

Diagnostic Error Messages

   None.

Exit status

   It always exits with status 0.

Known bugs

   None noted.

See also

   Program name                         Description
   biosed       Replace or delete sequence sections
   codcopy      Reads and writes a codon usage table
   cutseq       Removes a specified section from a sequence
   degapseq     Removes gap characters from sequences
   descseq      Alter the name or description of a sequence
   entret       Reads and writes (returns) flatfile entries
   extractfeat  Extract features from a sequence
   extractseq   Extract regions from a sequence
   listor       Write a list file of the logical OR of two sets of sequences
   maskfeat     Mask off features of a sequence
   maskseq      Mask off regions of a sequence
   newseq       Type in a short new sequence
   noreturn     Removes carriage return from ASCII files
   notseq       Exclude a set of sequences and write out the remaining ones
   nthseq       Writes one sequence from a multiple set of sequences
   pasteseq     Insert one sequence into another
   revseq       Reverse and complement a sequence
   seqret       Reads and writes (returns) sequences
   seqretsplit  Reads and writes (returns) sequences in individual files
   skipseq      Reads and writes (returns) sequences, skipping first few
   splitter     Split a sequence into (overlapping) smaller sequences
   trimest      Trim poly-A tails off EST sequences
   union        Reads sequence fragments and builds one sequence
   vectorstrip  Strips out DNA between a pair of vector sequences
   yank         Reads a sequence range, appends the 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

Target users

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

Comments

   None
