DOMAINSEQS documentation


 


CONTENTS

1.0 SUMMARY
2.0 INPUTS & OUTPUTS
3.0 INPUT FILE FORMAT
4.0 OUTPUT FILE FORMAT
5.0 DATA FILES
6.0 USAGE
7.0 KNOWN BUGS & WARNINGS
8.0 NOTES
9.0 DESCRIPTION
10.0 ALGORITHM
11.0 RELATED APPLICATIONS
12.0 DIAGNOSTIC ERROR MESSAGES
13.0 AUTHORS
14.0 REFERENCES



1.0 SUMMARY

Adds sequence records to a DCF file


2.0 INPUTS & OUTPUTS

DOMAINSEQS parses a DCF file (domain classification file) and writes a file containing the same data, except that domain sequence information derived from structural and, optionally, sequence databases are added. Domain sequences are taken from domain CCF files (clean coordinate files) and (optionally) the swissprot database. If the swissprot sequence is used, DOMAINSEQS requires a swissprot:PDB equivalence file that gives the accession number of each PDB file corresponding to the domains in the DCF file. The path for the CCF files (input) and names of DCF files (input and output) are specified by the user. A log file is also written.


3.0 INPUT FILE FORMAT

The format of the DCF file is described in the SCOPPARSE documentation.

Input files for usage example

File: ../scopparse-keep/all.scop

ID   D1CS4A_
XX
EN   1CS4
XX
TY   SCOP
XX
SI   53931 CL; 54861 FO; 55073 SF; 55074 FA; 55077 DO; 55078 SO; 39418 DD;
XX
CL   Alpha and beta proteins (a+b)
XX
FO   Ferredoxin-like
XX
SF   Adenylyl and guanylyl cyclase catalytic domain
XX
FA   Adenylyl and guanylyl cyclase catalytic domain
XX
DO   Adenylyl cyclase VC1, domain C1a
XX
OS   Dog (Canis familiaris)
XX
NC   1
XX
CN   [1]
XX
CH   A CHAIN; . START; . END;
//
ID   D1II7A_
XX
EN   1II7
XX
TY   SCOP
XX
SI   53931 CL; 56299 FO; 56300 SF; 64427 FA; 64428 DO; 64429 SO; 62415 DD;
XX
CL   Alpha and beta proteins (a+b)
XX
FO   Metallo-dependent phosphatases
XX
SF   Metallo-dependent phosphatases
XX
FA   DNA double-strand break repair nuclease
XX
DO   Mre11
XX
OS   Archaeon Pyrococcus furiosus
XX
NC   1
XX
CN   [1]
XX
CH   A CHAIN; . START; . END;
//

File: ../pdbtosp-keep/Epdbtosp.dat

EN   101M
XX
NE   1
XX
IN   MYG_PHYCA ID; P02185 ACC;
XX
//
EN   102L
XX
NE   1
XX
IN   LYCV_BPT4 ID; P00720 ACC;
XX
//
EN   102M
XX
NE   1
XX
IN   MYG_PHYCA ID; P02185 ACC;
XX
//
EN   103L
XX
NE   1
XX
IN   LYCV_BPT4 ID; P00720 ACC;
XX
//
EN   103M
XX
NE   1
XX
IN   MYG_PHYCA ID; P02185 ACC;
XX
//
EN   9XIA
XX
NE   1
XX
IN   XYLA_STRRU ID; P24300 ACC;
XX
//
EN   9XIM
XX
NE   1
XX
IN   XYLA_ACTMI ID; P12851 ACC;
XX
//




4.0 OUTPUT FILE FORMAT

The format of the DCF file is described in the SCOPPARSE documentation.
DOMAINSEQS may add the following records:

Output files for usage example

File: all_s.scop

ID   D1CS4A_
XX
EN   1CS4
XX
TY   SCOP
XX
SI   53931 CL; 54861 FO; 55073 SF; 55074 FA; 55077 DO; 55078 SO; 39418 DD;
XX
CL   Alpha and beta proteins (a+b)
XX
FO   Ferredoxin-like
XX
SF   Adenylyl and guanylyl cyclase catalytic domain
XX
FA   Adenylyl and guanylyl cyclase catalytic domain
XX
DO   Adenylyl cyclase VC1, domain C1a
XX
OS   Dog (Canis familiaris)
XX
DS   SEQUENCE    52 AA;   5817 MW;  D8CCAE0E1FC0849A CRC64;
     ADIEGFTSLA SQCTAQELVM TLNELFARFD KLAAENHCLR IKILGDCYYC VS
XX
NC   1
XX
CN   [1]
XX
CH   A CHAIN; . START; . END;
//
ID   D1II7A_
XX
EN   1II7
XX
TY   SCOP
XX
SI   53931 CL; 56299 FO; 56300 SF; 64427 FA; 64428 DO; 64429 SO; 62415 DD;
XX
CL   Alpha and beta proteins (a+b)
XX
FO   Metallo-dependent phosphatases
XX
SF   Metallo-dependent phosphatases
XX
FA   DNA double-strand break repair nuclease
XX
DO   Mre11
XX
OS   Archaeon Pyrococcus furiosus
XX
DS   SEQUENCE    65 AA;   7395 MW;  75FBE75B22FD3678 CRC64;
     MKFAHLADIH LGYEQFHKPQ REEEFAEAFK NALEIAVQEN VDFILIAGDL FHSSRPSPGT
     LKKAI
XX
NC   1
XX
CN   [1]
XX
CH   A CHAIN; . START; . END;
//

File: domainseqs.log

//
D1CS4A_        
NO_ACCESSION_NUMBER
//
D1II7A_        
NO_ACCESSION_NUMBER




5.0 DATA FILES

If the user specified retrieval of sequences from a sequence database, DOMAINSEQS uses a swissprot:PDB equivalence file is generated by using PDBTOSP.


6.0 USAGE

6.1 COMMAND LINE ARGUMENTS

Adds sequence records to a DCF file.
Version: EMBOSS:6.4.0.0

   Standard (Mandatory) qualifiers (* if not always prompted):
  [-dcfinfile]         infile     This option specifies the name of DCF file
                                  (domain classification file) (input). A
                                  'domain classification file' contains
                                  classification and other data for domains
                                  from SCOP or CATH, in DCF format
                                  (EMBL-like). The files are generated by
                                  using SCOPPARSE and CATHPARSE. Domain
                                  sequence information can be added to the
                                  file by using DOMAINSEQS.
  [-dpdbdir]           directory  [./] This option specifies the location of
                                  domain CCF file (clean coordinate files)
                                  (input). A 'clean cordinate file' contains
                                  coordinate and other data for a single PDB
                                  file or a single domain from SCOP or CATH,
                                  in CCF format (EMBL-like). The files,
                                  generated by using PDBPARSE (PDB files) or
                                  DOMAINER (domains), contain 'cleaned-up'
                                  data that is self-consistent and
                                  error-corrected. Records for residue solvent
                                  accessibility and secondary structure are
                                  added to the file by using PDBPLUS.
   -getswiss           toggle     [N] Retrieve swissprot sequence.
*  -pdbtospfile        infile     This option specifies the name of the
                                  pdbcodes to swissprot indexing file. The
                                  swissprot:PDB equivalence file is generated
                                  by PDBTOSP
  [-dcfoutfile]        outfile    [domainseqs.out] This option specifies the
                                  name of DCF file (domain classification
                                  file) (output). A 'domain classification
                                  file' contains classification and other data
                                  for domains from SCOP or CATH, in DCF
                                  format (EMBL-like). The files are generated
                                  by using SCOPPARSE and CATHPARSE. Domain
                                  sequence information can be added to the
                                  file by using DOMAINSEQS.
   -logfile            outfile    [domainseqs.log] This option specifies the
                                  name of log file for the build. The log file
                                  contains messages about any errors arising
                                  while domainseqs ran.

   Additional (Optional) qualifiers (* if not always prompted):
*  -datafile           matrixf    [EBLOSUM62] This option specifies the
                                  residue substitution matrix, which is used
                                  for sequence comparison.
*  -gapopen            float      [10.0 for any sequence] This option
                                  specifies the gap insertion penalty. This is
                                  the score taken away when a gap is created.
                                  The best value depends on the choice of
                                  comparison matrix. The default value assumes
                                  you are using the EBLOSUM62 matrix for
                                  protein sequences, and the EDNAFULL matrix
                                  for nucleotide sequences. (Floating point
                                  number from 1.0 to 100.0)
*  -gapextend          float      [0.5 for any sequence] This option specifies
                                  the gap extension penalty. This is added to
                                  the standard gap penalty for each base or
                                  residue in the gap. This is how long gaps
                                  are penalized. Usually you will expect a few
                                  long gaps rather than many short gaps, so
                                  the gap extension penalty should be lower
                                  than the gap penalty. (Floating point number
                                  from 0.0 to 10.0)

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

   "-dpdbdir" associated qualifiers
   -extension2         string     Default file extension

   "-dcfoutfile" associated qualifiers
   -odirectory3        string     Output directory

   "-logfile" associated qualifiers
   -odirectory         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
[-dcfinfile]
(Parameter 1)
infile This option specifies the name of DCF file (domain classification file) (input). A 'domain classification file' contains classification and other data for domains from SCOP or CATH, in DCF format (EMBL-like). The files are generated by using SCOPPARSE and CATHPARSE. Domain sequence information can be added to the file by using DOMAINSEQS. Input file Required
[-dpdbdir]
(Parameter 2)
directory This option specifies the location of domain CCF file (clean coordinate files) (input). A 'clean cordinate file' contains coordinate and other data for a single PDB file or a single domain from SCOP or CATH, in CCF format (EMBL-like). The files, generated by using PDBPARSE (PDB files) or DOMAINER (domains), contain 'cleaned-up' data that is self-consistent and error-corrected. Records for residue solvent accessibility and secondary structure are added to the file by using PDBPLUS. Directory ./
-getswiss toggle Retrieve swissprot sequence. Toggle value Yes/No No
-pdbtospfile infile This option specifies the name of the pdbcodes to swissprot indexing file. The swissprot:PDB equivalence file is generated by PDBTOSP Input file Required
[-dcfoutfile]
(Parameter 3)
outfile This option specifies the name of DCF file (domain classification file) (output). A 'domain classification file' contains classification and other data for domains from SCOP or CATH, in DCF format (EMBL-like). The files are generated by using SCOPPARSE and CATHPARSE. Domain sequence information can be added to the file by using DOMAINSEQS. Output file domainseqs.out
-logfile outfile This option specifies the name of log file for the build. The log file contains messages about any errors arising while domainseqs ran. Output file domainseqs.log
Additional (Optional) qualifiers
-datafile matrixf This option specifies the residue substitution matrix, which is used for sequence comparison. Comparison matrix file in EMBOSS data path EBLOSUM62
-gapopen float This option specifies the gap insertion penalty. This is the score taken away when a gap is created. The best value depends on the choice of comparison matrix. The default value assumes you are using the EBLOSUM62 matrix for protein sequences, and the EDNAFULL matrix for nucleotide sequences. Floating point number from 1.0 to 100.0 10.0 for any sequence
-gapextend float This option specifies the gap extension penalty. This is added to the standard gap penalty for each base or residue in the gap. This is how long gaps are penalized. Usually you will expect a few long gaps rather than many short gaps, so the gap extension penalty should be lower than the gap penalty. Floating point number from 0.0 to 10.0 0.5 for any sequence
Advanced (Unprompted) qualifiers
(none)
Associated qualifiers
"-dpdbdir" associated directory qualifiers
-extension2
-extension_dpdbdir
string Default file extension Any string ccf
"-dcfoutfile" associated outfile qualifiers
-odirectory3
-odirectory_dcfoutfile
string Output directory Any string  
"-logfile" associated outfile qualifiers
-odirectory 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

6.2 EXAMPLE SESSION

An example of interactive use of DOMAINSEQS is shown below. Here is a sample session with domainseqs


% domainseqs 
Adds sequence records to a DCF file.
Domain classification file: ../scopparse-keep/all.scop
Clean domain coordinates directory [./]: ../domainer-keep
Retrieve swissprot sequence. [N]: Y
Swissprot:pdb equivalence table file (optional): ../pdbtosp-keep/Epdbtosp.dat
Domain classification output file [domainseqs.out]: all_s.scop
Domainatrix log output file [domainseqs.log]: 

//
D1CS4A_        
//
D1II7A_        

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






7.0 KNOWN BUGS & WARNINGS

The swissprot:PDB equivalence file available as part of the EMBOSS distribution does not contain accession numbers for all PDB files and covers only a relatively small proportion of domains in SCOP.


8.0 NOTES

DOMAINSEQS will not attempt to retrieve a swissprot sequence for any domains comprised of more than a single segment, i.e. for domains whose NC record in the DCF file has a value other than 1 (see SCOPPARSE documentation).
The region of sequence to retrieve is identified by alignment of the sequence from the CCF file (structural database) to the full length sequences in swissprot. If this were to be done for segmented domains, the start and end point for the retrieved sequence (relative to the full length sequence) might actually include a completely different domain.

Consider :
(A) represents a sequence from the coordinate file for a segmented domain D1
(B) represents the full-length swissprot sequence, it includes D1, but D1 is split by a second domain D2
 
                 D1
  (A)  XXXXXXXXXXXXXXXXXXXXX
  
          D1         D2        D1
  (B) XXXXXXXXXX-----------XXXXXXXXXXX
It should be clear that for an alignment retrieving B, the start and end points for the retrieved sequence would be misleading.

The user should be aware that sequences from the domain CCF file for domains comprised of more than a single segment are not biologically significant, as the sequences are derived from different segments of one or more chains. However, such sequences might be acceptable for redundancy calculations (e.g. by using DOMAINNR) because two redundant domains made of similar fragments will have similar sequences, so the redundancy should be detectable.

8.1 GLOSSARY OF FILE TYPES

FILE TYPE FORMAT DESCRIPTION CREATED BY SEE ALSO
Domain classification file (for SCOP) DCF format (EMBL-like format for domain classification data). Classification and other data for domains from SCOP. SCOPPARSE Domain sequence information can be added to the file by using DOMAINSEQS.
Domain classification file (for CATH) DCF format (EMBL-like format for domain classification data). Classification and other data for domains from CATH. CATHPARSE Domain sequence information can be added to the file by using DOMAINSEQS.
Clean coordinate file (for protein) CCF format (EMBL-like format for protein coordinate and derived data). Coordinate and other data for a single PDB file. The data are 'cleaned-up': self-consistent and error-corrected. PDBPARSE Records for residue solvent accessibility and secondary structure are added to the file by using PDBPLUS.
Clean coordinate file (for domain) CCF format (EMBL-like format for protein coordinate and derived data). Coordinate and other data for a single domain from SCOP or CATH. The data are 'cleaned-up': self-consistent and error-corrected. DOMAINER Records for residue solvent accessibility and secondary structure are added to the file by using PDBPLUS.
swissprot:PDB equivalence file EMBL-like format. A file containing swissprot identifiers for PDB codes. Included in the EMBOSS distribution N.A.
None


9.0 DESCRIPTION

Domain sequences are not given in the raw SCOP or CATH parsable files, but are required for many analyses and for convenience should, ideally, be provided along with the classification itself. DOMAINSEQS reads a DCF file (domain classificaiton file) that lacks sequence information and writes one containing sequence information.


10.0 ALGORITHM

In order to find the start and end of a domain in a sequence from swissprot, the domain sequence from the domain CCF file is aligned to the full length protein sequence from swissprot. Alignment is performed first by string handling and if that fails, by using the EMBOSS implementation of the Needleman and Wunsch global alignment algorithm. Gap insertion and extension penalties used in the alignments are user-specified.


11.0 RELATED APPLICATIONS

See also

Program name Description
aaindexextract Extract amino acid property data from AAINDEX
allversusall Sequence similarity data from all-versus-all comparison
cathparse Generates DCF file from raw CATH files
cutgextract Extract codon usage tables from CUTG database
domainalign Generate alignments (DAF file) for nodes in a DCF file
domainer Generates domain CCF files from protein CCF files
domainnr Removes redundant domains from a DCF file
domainrep Reorder DCF file to identify representative structures
domainsse Add secondary structure records to a DCF file
helixturnhelix Identify nucleic acid-binding motifs in protein sequences
hetparse Converts heterogen group dictionary to EMBL-like format
jaspextract Extract data from JASPAR
libgen Generate discriminating elements from alignments
matgen3d Generate a 3D-1D scoring matrix from CCF files
pdbparse Parses PDB files and writes protein CCF files
pdbplus Add accessibility and secondary structure to a CCF file
pdbtosp Convert swissprot:PDB codes file to EMBL-like format
pepcoil Predicts coiled coil regions in protein sequences
printsextract Extract data from PRINTS database for use by pscan
prosextract Processes the PROSITE motif database for use by patmatmotifs
rebaseextract Process the REBASE database for use by restriction enzyme applications
rocon Generates a hits file from comparing two DHF files
rocplot Performs ROC analysis on hits files
scopparse Generate DCF file from raw SCOP files
seqalign Extend alignments (DAF file) with sequences (DHF file)
seqfraggle Removes fragment sequences from DHF files
seqnr Removes redundancy from DHF files
seqsort Remove ambiguous classified sequences from DHF files
seqwords Generates DHF files from keyword search of UniProt
sites Generate residue-ligand CON files from CCF files
ssematch Search a DCF file for secondary structure matches
tfextract Process TRANSFAC transcription factor database for use by tfscan



12.0 DIAGNOSTIC ERROR MESSAGES

None.


13.0 AUTHORS

Ranjeeva Ranasinghe

Jon Ison (jison@ebi.ac.uk)
The European Bioinformatics Institute Wellcome Trust Genome Campus Cambridge CB10 1SD UK


14.0 REFERENCES

Please cite the authors and EMBOSS.

Rice P, Longden I and Bleasby A (2000) "EMBOSS - The European Molecular Biology Open Software Suite" Trends in Genetics, 15:276-278.

See also http://emboss.sourceforge.net/

14.1 Other useful references