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Top Forums UNIX for Beginners Questions & Answers How to add specific bases at the beginning and ending of all the fasta sequences? Post 303043231 by dineshkumarsrk on Wednesday 22nd of January 2020 02:49:01 AM
Old 01-22-2020
How to add specific bases at the beginning and ending of all the fasta sequences?

Hi,
I have to add 7 bases of specific nucleotide at the beginning and ending of all the fasta sequences of a file. For example, I have a multi fasta file namely test.fasta as given below
Code:
test.fasta
>TalAA18_Xoo_CIAT_NZ_CP033194.1:_2936369-2939570:+1
ATGTCCCGGACCCGGCTGCCATCTCCCCCTGCGCCCTCGCCTGCGTTCTCGG
>TalAA30_Xoo_PXO421_Pseudo_NZ_CP033189.1:_2340357-2342688:+1
ATGGCGCAATGCACTGA
>TalAA21_Xoo_IX-280_Pseudo_NZ_CP019226.1:_2587862-2590859:-1
ATGGCGCAATGCACTGACGGGTGCCCCCCTGAACCTGACCCCGGACCAAGTGGTGGCCAT

I need to add the following bases CTGA TAGTA at the beginning and ending of every fasta sequences respectively.
Code:
Expected outcome
>TalAA18_Xoo_CIAT_NZ_CP033194.1:_2936369-2939570:+1
CTGAATGTCCCGGACCCGGCTGCCATCTCCCCCTGCGCCCTCGCCTGCGTTCTCGGTAGTA
>TalAA30_Xoo_PXO421_Pseudo_NZ_CP033189.1:_2340357-2342688:+1
CTGAATGGCGCAATGCACTGATAGTA
>TalAA21_Xoo_IX-280_Pseudo_NZ_CP019226.1:_2587862-2590859:-1
CTGAATGGCGCAATGCACTGACGGGTGCCCCCCTGAACCTGACCCCGGACCAAGTGGTGGCCATTAGTA

I have tried the following command line to add bases at the end of fasta file, but it is not serving my purpose,
Code:
sed 's/$/TAGTA/' test.fasta

. For adding bases at the beginning I do not have any idea, However, I tried the following command
Code:
sed -i 's/^/CTGA/' test.fasta

, but its adding bases at the fasta header.
Please help me to do the same.
Thank you.
 

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REPROF(1)							   User Commands							 REPROF(1)

NAME
reprof - predict protein secondary structure and solvent accessibility SYNOPSIS
reprof -i [query.blastPsiMat] [OPTIONS] reprof -i [query.fasta] [OPTIONS] reprof -i [query.blastPsiMat|query.fasta] --mutations [mutations.txt] [OPTIONS] DESCRIPTION
Predict protein secondary structure and solvent accessibility. Output Format The output format is self-explanatory, i.e. the colums of the output are described in the output file itself. OPTIONS
-i, --input=FILE Input BLAST PSSM matrix file (from Blast -Q option) or input (single) FASTA file. -o, --out=FILE Either an output file or a directory. If not provided or a directory, the suffix of the input filename (i.e. .fasta or .blastPsiMat) is replaced to create an output filename. --mutations=[all|FILE] Either the keyword "all" to predict all possible mutations or a file containing mutations one per line such as "C12M" for C is mutated to M on position 12: C30Y R31W G48D This mutation code is also attached to the output filename using "_". An additional file ending "_ORI" contains the prediction using no evolutionary information even if a BLAST PSSM matrix was provided. --modeldir=DIR Directory where the model and feature files are stored. Default: /usr/share/reprof. AUTHOR
Peter Hoenigschmid hoenigschmid@rostlab.org, Burkhard Rost EXAMPLES
Prediction from BLAST PSSM matrix for best results: reprof -i /usr/share/doc/reprof/examples/example.Q -o /tmp/example.Q.reprof Prediction from FASTA file: reprof -i /usr/share/doc/reprof/examples/example.fasta -o /tmp/example.fasta.reprof Prediction from BLAST PSSM matrix file using the mutation mode: reprof -i /usr/share/doc/reprof/examples/example.Q -o /tmp/mutations_example.Q.reprof --mutations /usr/share/doc/reprof/examples/mutations.txt # Result files for the above call are going to be: # /tmp/mutations_example.Q.{reprof,reprof_F172P,reprof_M1Q,reprof_N34Y,reprof_ORI} - see --mutations for a description of the extensions. COPYRIGHT
This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>. BUGS
https://rostlab.org/bugzilla3/enter_bug.cgi?product=reprof SEE ALSO
blast2(1) http://rostlab.org/ 1.0.1 2012-01-13 REPROF(1)
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