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
I need to add the following bases CTGATAGTA at the beginning and ending of every fasta sequences respectively.
I have tried the following command line to add bases at the end of fasta file, but it is not serving my purpose,
. For adding bases at the beginning I do not have any idea, However, I tried the following command
, but its adding bases at the fasta header.
Please help me to do the same.
Thank you.
I have got an Perl array like:
@array = (1,2,3,4,5,6,1,2,3,4,1,2,1,2,3,4,5,6,7,8,9...............)
This numeric sequence will be always sequentially increasing, unless it encounters, The beginning of the new sequentially increasing numeric sequence.
SO in this array we get sequentially... (5 Replies)
Hi, I have multiple large files which consist of the below format:
I am trying to write an awk or sed script to remove all occurrences of the 00 record except the first and remove all of the 80 records except the last one.
Any help would be greatly appreciated. (10 Replies)
Hi,
I am having a file of dna sequences in fasta format which look like this:
>admin_1_45
atatagcaga
>admin_1_46
atatagcagaatatatat
with many such thousands of sequences in a single file. I want to the replace the accession Id "admin_1_45" similarly in following sequences to... (5 Replies)
I have two files. File1 is shown below.
>153L:B|PDBID|CHAIN|SEQUENCE
RTDCYGNVNRIDTTGASCKTAKPEGLSYCGVSASKKIAERDLQAMDRYKTIIKKVGEKLCVEPAVIAGIISRESHAGKVL
KNGWGDRGNGFGLMQVDKRSHKPQGTWNGEVHITQGTTILINFIKTIQKKFPSWTKDQQLKGGISAYNAGAGNVRSYARM
DIGTTHDDYANDVVARAQYYKQHGY
>16VP:A|PDBID|CHAIN|SEQUENCE... (7 Replies)
I have a fasta file as follows
>sp|O15090|FABP4_HUMAN Fatty acid-binding protein, adipocyte OS=Homo sapiens GN=FABP4 PE=1 SV=3
MCDAFVGTWKLVSSENFDDYMKEVGVGFATRKVAGMAKPNMIISVNGDVITIKSESTFKN
TEISFILGQEFDEVTADDRKVKSTITLDGGVLVHVQKWDGKSTTIKRKREDDKLVVECVM
KGVTSTRVYERA
>sp|L18484|AP2A2_RAT AP-2... (3 Replies)
Hi
How can I extract sequences from a fasta file with respect a certain criteria? The beginning of my file (containing in total more than 1000 sequences) looks like this:
>H8V34IS02I59VP
SDACNDLTIALLQIAREVRVCNPTFSFRWHPQVKDEVMRECFDCIRQGLG
YPSMRNDPILIANCMNWHGHPLEEARQWVHQACMSPCPSTKHGFQPFRMA... (6 Replies)
Hi,
I have a fasta file with multiple sequences. How can i get only unique sequences from the file.
For example
my_file.fasta
>seq1
TCTCAAAGAAAGCTGTGCTGCATACTGTACAAAACTTTGTCTGGAGAGATGGAGAATCTCATTGACTTTACAGGTGTGGACGGTCTTCAGAGATGGCTCAAGCTAACATTCCCTGACACACCTATAGGGAAAGAGCTAAC
>seq2... (3 Replies)
I could calculate the length of entire fasta sequences by following command,
awk '/^>/{if (l!="") print l; print; l=0; next}{l+=length($0)}END{print l}' unique.fasta
But, I need to calculate the length of a particular fasta sequence specified/listed in another txt file. The results to to be... (14 Replies)
I have a fasta file as follows
>sp|Q8WWQ8|STAB2_HUMAN Stabilin-2 OS=Homo sapiens OX=9606 GN=STAB2 PE=1 SV=3
MMLQHLVIFCLGLVVQNFCSPAETTGQARRCDRKSLLTIRTECRSCALNLGVKCPDGYTM
ITSGSVGVRDCRYTFEVRTYSLSLPGCRHICRKDYLQPRCCPGRWGPDCIECPGGAGSPC
NGRGSCAEGMEGNGTCSCQEGFGGTACETCADDNLFGPSCSSVCNCVHGVCNSGLDGDGT... (3 Replies)
I have to mine the following sequence pattern from a large fasta file namely gene.fasta (contains multiple fasta sequences) along with the flanking sequences of 5 bases at starting position and ending position,
AAGCZ-N16-AAGCZ
Z represents A, C or G (Except T)
N16 represents any of the four... (3 Replies)
Discussion started by: dineshkumarsrk
3 Replies
LEARN ABOUT DEBIAN
cdhit-2d
CD-HIT-2D(1) User Commands CD-HIT-2D(1)NAME
cdhit-2d - quickly group sequences in db1 or db2 format
SYNOPSIS
cdhit-2d [Options]
DESCRIPTION
====== CD-HIT version 4.6 (built on Apr 26 2012) ======
Options
-i input filename for db1 in fasta format, required
-i2 input filename for db2 in fasta format, required
-o output filename, required
-c sequence identity threshold, default 0.9 this is the default cd-hit's "global sequence identity" calculated as: number of identical
amino acids in alignment divided by the full length of the shorter sequence
-G use global sequence identity, default 1 if set to 0, then use local sequence identity, calculated as : number of identical amino
acids in alignment divided by the length of the alignment NOTE!!! don't use -G 0 unless you use alignment coverage controls see
options -aL, -AL, -aS, -AS
-b band_width of alignment, default 20
-M memory limit (in MB) for the program, default 800; 0 for unlimitted;
-T number of threads, default 1; with 0, all CPUs will be used
-n word_length, default 5, see user's guide for choosing it
-l length of throw_away_sequences, default 10
-t tolerance for redundance, default 2
-d length of description in .clstr file, default 20 if set to 0, it takes the fasta defline and stops at first space
-s length difference cutoff, default 0.0 if set to 0.9, the shorter sequences need to be at least 90% length of the representative of
the cluster
-S length difference cutoff in amino acid, default 999999 if set to 60, the length difference between the shorter sequences and the
representative of the cluster can not be bigger than 60
-s2 length difference cutoff for db1, default 1.0 by default, seqs in db1 >= seqs in db2 in a same cluster if set to 0.9, seqs in db1
may just >= 90% seqs in db2
-S2 length difference cutoff, default 0 by default, seqs in db1 >= seqs in db2 in a same cluster if set to 60, seqs in db2 may 60aa
longer than seqs in db1
-aL alignment coverage for the longer sequence, default 0.0 if set to 0.9, the alignment must covers 90% of the sequence
-AL alignment coverage control for the longer sequence, default 99999999 if set to 60, and the length of the sequence is 400, then the
alignment must be >= 340 (400-60) residues
-aS alignment coverage for the shorter sequence, default 0.0 if set to 0.9, the alignment must covers 90% of the sequence
-AS alignment coverage control for the shorter sequence, default 99999999 if set to 60, and the length of the sequence is 400, then the
alignment must be >= 340 (400-60) residues
-A minimal alignment coverage control for the both sequences, default 0 alignment must cover >= this value for both sequences
-uL maximum unmatched percentage for the longer sequence, default 1.0 if set to 0.1, the unmatched region (excluding leading and tailing
gaps) must not be more than 10% of the sequence
-uS maximum unmatched percentage for the shorter sequence, default 1.0 if set to 0.1, the unmatched region (excluding leading and tail-
ing gaps) must not be more than 10% of the sequence
-U maximum unmatched length, default 99999999 if set to 10, the unmatched region (excluding leading and tailing gaps) must not be more
than 10 bases
-B 1 or 0, default 0, by default, sequences are stored in RAM if set to 1, sequence are stored on hard drive it is recommended to use
-B 1 for huge databases
-p 1 or 0, default 0 if set to 1, print alignment overlap in .clstr file
-g 1 or 0, default 0 by cd-hit's default algorithm, a sequence is clustered to the first cluster that meet the threshold (fast clus-
ter). If set to 1, the program will cluster it into the most similar cluster that meet the threshold (accurate but slow mode) but
either 1 or 0 won't change the representatives of final clusters
-bak write backup cluster file (1 or 0, default 0)
-h print this help
Questions, bugs, contact Weizhong Li at liwz@sdsc.edu
If you find cd-hit useful, please kindly cite:
"Clustering of highly homologous sequences to reduce thesize of large protein database", Weizhong Li, Lukasz Jaroszewski & Adam
Godzik. Bioinformatics, (2001) 17:282-283 "Cd-hit: a fast program for clustering and comparing large sets of protein or nucleotide
sequences", Weizhong Li & Adam Godzik. Bioinformatics, (2006) 22:1658-1659
cd-hit-2d 4.6-2012-04-25 April 2012 CD-HIT-2D(1)