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date Wed, 21 Dec 2016 12:13:04 -0500
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1 Conversion of NCBI BLAST+ tblastn results to PSL format
2 =======================================================
3 Wilson Leung <wleung@wustl.edu>
4
5 Last Update: 04/24/2016
6
7
8 Version information
9 -------------------
10 * Kent source tree: v324
11 * NCBI BLAST+: BLAST 2.2.30+
12
13 Data sources
14 -------------------
15 For testing purposes, the database consists of only contig1 in the Dbia3 assembly while the protein sequences correspond to the three isoforms of the *D. melanogaster* *ci* gene in contig1. The protein sequences are available through [FlyBase](http://flybase.org/cgi-bin/getseq.html?source=dmel&id=FBgn0004859&chr=4&dump=PrecompiledFasta&targetset=translation).
16
17 * Dbia3.fa = contig1 sequence in the Dbia3 asssembly
18 * ci.pep = Protein sequences for the three isoforms of the *ci* gene in *D. melanogaster*
19
20 Conversion protocol
21 -----------------------
22 1. Create BLAST database for the assembly
23 ```
24 makeblastdb -in Dbia3.fa -dbtype nucl
25 ```
26
27 2. Perform tblastn search and output results in XML format
28 ```
29 tblastn -outfmt 5 -db Dbia3.fa -query ci.pep -out tblastn_Dbia3_ci.xml -evalue 1e-2
30 ```
31
32 3. Convert results into PSL format
33 ```
34 blastXmlToPsl -convertToNucCoords tblastn_Dbia3_ci.xml tblastn_Dbia3_ci.xml.psl
35 ```
36
37 4. Convert PSL output into BED format
38 ```
39 pslToBed tblastn_Dbia3_ci.xml.psl tblastn_Dbia3_ci.xml.bed
40 ```
41
42 Output files
43 -----------------------
44 * tblastn_Dbia3_ci.xml = tblastn results in XML format
45 * tblastn_Dbia3_ci.xml.psl = tblastn results in PSL format
46 * tblastn_Dbia3_ci.xml.bed = tblastn results in BED format
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