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<HTML>
<HEAD>
<TITLE>
EMBOSS: backtranambig
</TITLE>
</HEAD>
<BODY BGCOLOR="#FFFFFF" text="#000000">
<table align=center border=0 cellspacing=0 cellpadding=0>
<tr><td valign=top>
<A HREF="/" ONMOUSEOVER="self.status='Go to the EMBOSS home page';return true"><img border=0 src="emboss_icon.jpg" alt="" width=150 height=48></a>
</td>
<td align=left valign=middle>
<b><font size="+6">
backtranambig
</font></b>
</td></tr>
</table>
<br>
<p>
<H2>
Function
</H2>
Back translate a protein sequence to ambiguous codons
<H2>
Description
</H2>
<b>backtranambig</b> takes a protein sequence and makes the nucleic
acid sequence it could have come from. It does this by generating
nucleotide ambiguity codes that represent all possible codons for each
amino acid.
<p>
The resulting ambiguous nucleotide sequence can be translated to the
original protein using <b>transeq</b>, which will recognise highly
redundant codons (for example "WSN" for serine) as being produced by a
program such as <b>backtranambig</b>.
<h3>Genetic code</h3>
<b>backtranambig</b> needs a genetic code to generate the ambiguous
codons. The default genetic code is the standard ('Universal') code.
<H2>
Usage
</H2>
<b>Here is a sample session with backtranambig</b>
<p>
<p>
<table width="90%"><tr><td bgcolor="#CCFFFF"><pre>
% <b>backtranambig </b>
Back translate a protein sequence to ambiguous codons
Input (gapped) protein sequence: <b>tsw:opsd_human</b>
(gapped) nucleotide output sequence [opsd_human.fasta]: <b></b>
</pre></td></tr></table><p>
<p>
<a href="#input.1">Go to the input files for this example</a><br><a href="#output.1">Go to the output files for this example</a><p><p>
<H2>
Command line arguments
</H2>
<table CELLSPACING=0 CELLPADDING=3 BGCOLOR="#f5f5ff" ><tr><td>
<pre>
Standard (Mandatory) qualifiers:
[-sequence] sequence (Gapped) protein sequence filename and
optional format, or reference (input USA)
[-outfile] seqout [<sequence>.<format>] (Gapped) nucleotide
sequence filename and optional format
(output USA)
Additional (Optional) qualifiers:
-table menu [0] Genetic code to use (Values: 0
(Standard); 1 (Standard (with alternative
initiation codons)); 2 (Vertebrate
Mitochondrial); 3 (Yeast Mitochondrial); 4
(Mold, Protozoan, Coelenterate Mitochondrial
and Mycoplasma/Spiroplasma); 5
(Invertebrate Mitochondrial); 6 (Ciliate
Macronuclear and Dasycladacean); 9
(Echinoderm Mitochondrial); 10 (Euplotid
Nuclear); 11 (Bacterial); 12 (Alternative
Yeast Nuclear); 13 (Ascidian Mitochondrial);
14 (Flatworm Mitochondrial); 15
(Blepharisma Macronuclear); 16
(Chlorophycean Mitochondrial); 21 (Trematode
Mitochondrial); 22 (Scenedesmus obliquus);
23 (Thraustochytrium Mitochondrial))
Advanced (Unprompted) qualifiers: (none)
Associated qualifiers:
"-sequence" associated qualifiers
-sbegin1 integer Start of the sequence to be used
-send1 integer End of the 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
"-outfile" 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 dying program messages
</pre>
</td></tr></table>
<P>
<table border cellspacing=0 cellpadding=3 bgcolor="#ccccff">
<tr bgcolor="#FFFFCC">
<th align="left" colspan=2>Standard (Mandatory) qualifiers</th>
<th align="left">Allowed values</th>
<th align="left">Default</th>
</tr>
<tr>
<td>[-sequence]<br>(Parameter 1)</td>
<td>(Gapped) protein sequence filename and optional format, or reference (input USA)</td>
<td>Readable sequence</td>
<td><b>Required</b></td>
</tr>
<tr>
<td>[-outfile]<br>(Parameter 2)</td>
<td>(Gapped) nucleotide sequence filename and optional format (output USA)</td>
<td>Writeable sequence</td>
<td><i><*></i>.<i>format</i></td>
</tr>
<tr bgcolor="#FFFFCC">
<th align="left" colspan=2>Additional (Optional) qualifiers</th>
<th align="left">Allowed values</th>
<th align="left">Default</th>
</tr>
<tr>
<td>-table</td>
<td>Genetic code to use</td>
<td><table><tr><td>0</td> <td><i>(Standard)</i></td></tr><tr><td>1</td> <td><i>(Standard (with alternative initiation codons))</i></td></tr><tr><td>2</td> <td><i>(Vertebrate Mitochondrial)</i></td></tr><tr><td>3</td> <td><i>(Yeast Mitochondrial)</i></td></tr><tr><td>4</td> <td><i>(Mold, Protozoan, Coelenterate Mitochondrial and Mycoplasma/Spiroplasma)</i></td></tr><tr><td>5</td> <td><i>(Invertebrate Mitochondrial)</i></td></tr><tr><td>6</td> <td><i>(Ciliate Macronuclear and Dasycladacean)</i></td></tr><tr><td>9</td> <td><i>(Echinoderm Mitochondrial)</i></td></tr><tr><td>10</td> <td><i>(Euplotid Nuclear)</i></td></tr><tr><td>11</td> <td><i>(Bacterial)</i></td></tr><tr><td>12</td> <td><i>(Alternative Yeast Nuclear)</i></td></tr><tr><td>13</td> <td><i>(Ascidian Mitochondrial)</i></td></tr><tr><td>14</td> <td><i>(Flatworm Mitochondrial)</i></td></tr><tr><td>15</td> <td><i>(Blepharisma Macronuclear)</i></td></tr><tr><td>16</td> <td><i>(Chlorophycean Mitochondrial)</i></td></tr><tr><td>21</td> <td><i>(Trematode Mitochondrial)</i></td></tr><tr><td>22</td> <td><i>(Scenedesmus obliquus)</i></td></tr><tr><td>23</td> <td><i>(Thraustochytrium Mitochondrial)</i></td></tr></table></td>
<td>0</td>
</tr>
<tr bgcolor="#FFFFCC">
<th align="left" colspan=2>Advanced (Unprompted) qualifiers</th>
<th align="left">Allowed values</th>
<th align="left">Default</th>
</tr>
<tr>
<td colspan=4>(none)</td>
</tr>
</table>
<H2>
Input file format
</H2>
Any DNA sequence USA.
<p>
<a name="input.1"></a>
<h3>Input files for usage example </h3>
'tsw:opsd_human' is a sequence entry in the example protein database 'tsw'
<p>
<p><h3>Database entry: tsw:opsd_human</h3>
<table width="90%"><tr><td bgcolor="#FFCCFF">
<pre>
ID OPSD_HUMAN Reviewed; 348 AA.
AC P08100; Q16414; Q2M249;
DT 01-AUG-1988, integrated into UniProtKB/Swiss-Prot.
DT 01-AUG-1988, sequence version 1.
DT 20-MAR-2007, entry version 91.
DE Rhodopsin (Opsin-2).
GN Name=RHO; Synonyms=OPN2;
OS Homo sapiens (Human).
OC Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi;
OC Mammalia; Eutheria; Euarchontoglires; Primates; Haplorrhini;
OC Catarrhini; Hominidae; Homo.
OX NCBI_TaxID=9606;
RN [1]
RP NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX MEDLINE=84272729; PubMed=6589631;
RA Nathans J., Hogness D.S.;
RT "Isolation and nucleotide sequence of the gene encoding human
RT rhodopsin.";
RL Proc. Natl. Acad. Sci. U.S.A. 81:4851-4855(1984).
RN [2]
RP NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RA Suwa M., Sato T., Okouchi I., Arita M., Futami K., Matsumoto S.,
RA Tsutsumi S., Aburatani H., Asai K., Akiyama Y.;
RT "Genome-wide discovery and analysis of human seven transmembrane helix
RT receptor genes.";
RL Submitted (JUL-2001) to the EMBL/GenBank/DDBJ databases.
RN [3]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA].
RC TISSUE=Retina;
RG The German cDNA consortium;
RL Submitted (JUN-2003) to the EMBL/GenBank/DDBJ databases.
RN [4]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA].
RX PubMed=15489334; DOI=10.1101/gr.2596504;
RG The MGC Project Team;
RT "The status, quality, and expansion of the NIH full-length cDNA
RT project: the Mammalian Gene Collection (MGC).";
RL Genome Res. 14:2121-2127(2004).
RN [5]
RP NUCLEOTIDE SEQUENCE [GENOMIC DNA] OF 1-120.
RX PubMed=8566799; DOI=10.1016/0378-1119(95)00688-5;
RA Bennett J., Beller B., Sun D., Kariko K.;
RT "Sequence analysis of the 5.34-kb 5' flanking region of the human
RT rhodopsin-encoding gene.";
RL Gene 167:317-320(1995).
RN [6]
RP REVIEW ON RP4 VARIANTS.
RX MEDLINE=94004905; PubMed=8401533;
RA Al-Maghtheh M., Gregory C., Inglehearn C., Hardcastle A.,
RA Bhattacharya S.;
<font color=red> [Part of this file has been deleted for brevity]</font>
FT /FTId=VAR_004816.
FT VARIANT 209 209 V -> M (effect not known).
FT /FTId=VAR_004817.
FT VARIANT 211 211 H -> P (in RP4).
FT /FTId=VAR_004818.
FT VARIANT 211 211 H -> R (in RP4).
FT /FTId=VAR_004819.
FT VARIANT 216 216 M -> K (in RP4).
FT /FTId=VAR_004820.
FT VARIANT 220 220 F -> C (in RP4).
FT /FTId=VAR_004821.
FT VARIANT 222 222 C -> R (in RP4).
FT /FTId=VAR_004822.
FT VARIANT 255 255 Missing (in RP4).
FT /FTId=VAR_004823.
FT VARIANT 264 264 Missing (in RP4).
FT /FTId=VAR_004824.
FT VARIANT 267 267 P -> L (in RP4).
FT /FTId=VAR_004825.
FT VARIANT 267 267 P -> R (in RP4).
FT /FTId=VAR_004826.
FT VARIANT 292 292 A -> E (in CSNBAD1).
FT /FTId=VAR_004827.
FT VARIANT 296 296 K -> E (in RP4).
FT /FTId=VAR_004828.
FT VARIANT 297 297 S -> R (in RP4).
FT /FTId=VAR_004829.
FT VARIANT 342 342 T -> M (in RP4).
FT /FTId=VAR_004830.
FT VARIANT 345 345 V -> L (in RP4).
FT /FTId=VAR_004831.
FT VARIANT 345 345 V -> M (in RP4).
FT /FTId=VAR_004832.
FT VARIANT 347 347 P -> A (in RP4).
FT /FTId=VAR_004833.
FT VARIANT 347 347 P -> L (in RP4; common variant).
FT /FTId=VAR_004834.
FT VARIANT 347 347 P -> Q (in RP4).
FT /FTId=VAR_004835.
FT VARIANT 347 347 P -> R (in RP4).
FT /FTId=VAR_004836.
FT VARIANT 347 347 P -> S (in RP4).
FT /FTId=VAR_004837.
SQ SEQUENCE 348 AA; 38893 MW; 6F4F6FCBA34265B2 CRC64;
MNGTEGPNFY VPFSNATGVV RSPFEYPQYY LAEPWQFSML AAYMFLLIVL GFPINFLTLY
VTVQHKKLRT PLNYILLNLA VADLFMVLGG FTSTLYTSLH GYFVFGPTGC NLEGFFATLG
GEIALWSLVV LAIERYVVVC KPMSNFRFGE NHAIMGVAFT WVMALACAAP PLAGWSRYIP
EGLQCSCGID YYTLKPEVNN ESFVIYMFVV HFTIPMIIIF FCYGQLVFTV KEAAAQQQES
ATTQKAEKEV TRMVIIMVIA FLICWVPYAS VAFYIFTHQG SNFGPIFMTI PAFFAKSAAI
YNPVIYIMMN KQFRNCMLTT ICCGKNPLGD DEASATVSKT ETSQVAPA
//
</pre>
</td></tr></table><p>
<H2>
Output file format
</H2>
The output is a nucleotide sequence containing the most favoured back
translation of the specified protein, and using the specified
translation table (which defaults to human).
<p>
<a name="output.1"></a>
<h3>Output files for usage example </h3>
<p><h3>File: opsd_human.fasta</h3>
<table width="90%"><tr><td bgcolor="#CCFFCC">
<pre>
>OPSD_HUMAN P08100 Rhodopsin (Opsin-2).
ATGAAYGGNACNGARGGNCCNAAYTTYTAYGTNCCNTTYWSNAAYGCNACNGGNGTNGTN
MGNWSNCCNTTYGARTAYCCNCARTAYTAYYTNGCNGARCCNTGGCARTTYWSNATGYTN
GCNGCNTAYATGTTYYTNYTNATHGTNYTNGGNTTYCCNATHAAYTTYYTNACNYTNTAY
GTNACNGTNCARCAYAARAARYTNMGNACNCCNYTNAAYTAYATHYTNYTNAAYYTNGCN
GTNGCNGAYYTNTTYATGGTNYTNGGNGGNTTYACNWSNACNYTNTAYACNWSNYTNCAY
GGNTAYTTYGTNTTYGGNCCNACNGGNTGYAAYYTNGARGGNTTYTTYGCNACNYTNGGN
GGNGARATHGCNYTNTGGWSNYTNGTNGTNYTNGCNATHGARMGNTAYGTNGTNGTNTGY
AARCCNATGWSNAAYTTYMGNTTYGGNGARAAYCAYGCNATHATGGGNGTNGCNTTYACN
TGGGTNATGGCNYTNGCNTGYGCNGCNCCNCCNYTNGCNGGNTGGWSNMGNTAYATHCCN
GARGGNYTNCARTGYWSNTGYGGNATHGAYTAYTAYACNYTNAARCCNGARGTNAAYAAY
GARWSNTTYGTNATHTAYATGTTYGTNGTNCAYTTYACNATHCCNATGATHATHATHTTY
TTYTGYTAYGGNCARYTNGTNTTYACNGTNAARGARGCNGCNGCNCARCARCARGARWSN
GCNACNACNCARAARGCNGARAARGARGTNACNMGNATGGTNATHATHATGGTNATHGCN
TTYYTNATHTGYTGGGTNCCNTAYGCNWSNGTNGCNTTYTAYATHTTYACNCAYCARGGN
WSNAAYTTYGGNCCNATHTTYATGACNATHCCNGCNTTYTTYGCNAARWSNGCNGCNATH
TAYAAYCCNGTNATHTAYATHATGATGAAYAARCARTTYMGNAAYTGYATGYTNACNACN
ATHTGYTGYGGNAARAAYCCNYTNGGNGAYGAYGARGCNWSNGCNACNGTNWSNAARACN
GARACNWSNCARGTNGCNCCNGCN
</pre>
</td></tr></table><p>
<H2>
Data files
</H2>
The codon usage table is read by default from "Ehum.cut" in the 'data/CODONS'
directory of the EMBOSS distribution. If the name of a codon usage file
is specified on the command line, then this file will first be searched
for in the current directory and then in the 'data/CODONS' directory of
the EMBOSS distribution.
<p>
<p>
EMBOSS data files are distributed with the application and stored
in the standard EMBOSS data directory, which is defined
by the EMBOSS environment variable EMBOSS_DATA.
<p>
To see the available EMBOSS data files, run:
<p>
<pre>
% embossdata -showall
</pre>
<p>
To fetch one of the data files (for example 'Exxx.dat') into your
current directory for you to inspect or modify, run:
<pre>
% embossdata -fetch -file Exxx.dat
</pre>
<p>
Users can provide their own data files in their own directories.
Project specific files can be put in the current directory, or for
tidier directory listings in a subdirectory called
".embossdata". Files for all EMBOSS runs can be put in the user's home
directory, or again in a subdirectory called ".embossdata".
<p>
The directories are searched in the following order:
<ul>
<li> . (your current directory)
<li> .embossdata (under your current directory)
<li> ~/ (your home directory)
<li> ~/.embossdata
</ul>
<p>
<H2>
Notes
</H2>
None.
<H2>
References
</H2>
None.
<H2>
Warnings
</H2>
None.
<H2>
Diagnostic Error Messages
</H2>
"Corrupt codon index file" - the codon usage file is incomplete or empty.
<p>
"The file 'drosoph.cut' does not exist" - the codon usage file cannot be opened.
<H2>
Exit status
</H2>
This program always exits with a status of 0, unless the codon usage
table cannot be opened.
<H2>
Known bugs
</H2>
None.
<h2><a name="See also">See also</a></h2>
<table border cellpadding=4 bgcolor="#FFFFF0">
<tr><th>Program name</th><th>Description</th></tr>
<tr>
<td><a href="backtranseq.html">backtranseq</a></td>
<td>Back translate a protein sequence</td>
</tr>
<tr>
<td><a href="charge.html">charge</a></td>
<td>Protein charge plot</td>
</tr>
<tr>
<td><a href="checktrans.html">checktrans</a></td>
<td>Reports STOP codons and ORF statistics of a protein</td>
</tr>
<tr>
<td><a href="coderet.html">coderet</a></td>
<td>Extract CDS, mRNA and translations from feature tables</td>
</tr>
<tr>
<td><a href="compseq.html">compseq</a></td>
<td>Count composition of dimer/trimer/etc words in a sequence</td>
</tr>
<tr>
<td><a href="emowse.html">emowse</a></td>
<td>Protein identification by mass spectrometry</td>
</tr>
<tr>
<td><a href="freak.html">freak</a></td>
<td>Residue/base frequency table or plot</td>
</tr>
<tr>
<td><a href="iep.html">iep</a></td>
<td>Calculates the isoelectric point of a protein</td>
</tr>
<tr>
<td><a href="mwcontam.html">mwcontam</a></td>
<td>Shows molwts that match across a set of files</td>
</tr>
<tr>
<td><a href="mwfilter.html">mwfilter</a></td>
<td>Filter noisy molwts from mass spec output</td>
</tr>
<tr>
<td><a href="octanol.html">octanol</a></td>
<td>Displays protein hydropathy</td>
</tr>
<tr>
<td><a href="pepinfo.html">pepinfo</a></td>
<td>Plots simple amino acid properties in parallel</td>
</tr>
<tr>
<td><a href="pepstats.html">pepstats</a></td>
<td>Protein statistics</td>
</tr>
<tr>
<td><a href="pepwindow.html">pepwindow</a></td>
<td>Displays protein hydropathy</td>
</tr>
<tr>
<td><a href="pepwindowall.html">pepwindowall</a></td>
<td>Displays protein hydropathy of a set of sequences</td>
</tr>
<tr>
<td><a href="plotorf.html">plotorf</a></td>
<td>Plot potential open reading frames</td>
</tr>
<tr>
<td><a href="prettyseq.html">prettyseq</a></td>
<td>Output sequence with translated ranges</td>
</tr>
<tr>
<td><a href="remap.html">remap</a></td>
<td>Display sequence with restriction sites, translation etc</td>
</tr>
<tr>
<td><a href="showorf.html">showorf</a></td>
<td>Pretty output of DNA translations</td>
</tr>
<tr>
<td><a href="showseq.html">showseq</a></td>
<td>Display a sequence with features, translation etc</td>
</tr>
<tr>
<td><a href="sixpack.html">sixpack</a></td>
<td>Display a DNA sequence with 6-frame translation and ORFs</td>
</tr>
<tr>
<td><a href="transeq.html">transeq</a></td>
<td>Translate nucleic acid sequences</td>
</tr>
</table>
<H2>
Author(s)
</H2>
Alan Bleasby (ajb © ebi.ac.uk)
<br>
European Bioinformatics Institute, Wellcome Trust Genome Campus, Hinxton, Cambridge CB10 1SD, UK
<H2>
History
</H2>
None
<H2>
Target users
</H2>
This program is intended to be used by everyone and everything, from naive users to embedded scripts.
<H2>
Comments
</H2>
None
</BODY>
</HTML>