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Re: [modeller_usage] doutbs about file



Amanda Moraes wrote:
My name is Amanda Maia and I´m a beginner using Modeller. I´m having some trouble finding the answers to my questions on the manual. Could you help me? I have a sequence that aligns (BLAST pdb)with various structures on PDB within an average identity of 35%. Since I need to use as much models as I can get, I´m writing a PIR file with 5 templates. But one (1MDY) has 2 chains (out of 4) that blast quotes (B and E). Do I have to make a PIR line to each one? And a pdb file for each one too? Example:
 >P1;molde1MDYB
structureX:molde1MDYB:FIRST:@:LAST :@:myoD:myoD: 2.00:-1.00
----------------------------------------------------------------------------------------------------------------------------TTNADRRKAATMR--ERRR------LSKVNEAFETLKRSTSSNPN-----------QRLPKVEILR--------NAIRYIEGLQAL-LRD-------------------------------------*
>P1;molde1MDYA
structureX:molde1MDYA:FIRST:@:LAST :@:myoD:myoD: 2.00:-1.00
----------------------------------------------------------------------------------------------------------------------MELKRKTTNADRRKAATMR--ERRR------LSKVNEAFETLKRSTSSNPN-----------QRLPKVEILR--------NAIRYIEGLQAL-LRD-------------------------------------*

Sure, you will need a sequence in your alignment file for each template. But you can use the same PDB file for the two chains - you can just tell Modeller in the sequence headers which chains to read out of the PDB, for example:

>P1;tmplB
structureX:foo:FIRST:B:LAST :B::: 2.00:-1.00
-----*

>P1;tmplE
structureX:foo:FIRST:E:LAST :E::: 2.00:-1.00
-----*

This would use two templates, called 'tmplB' and 'tmplE', each of which is a single chain read from the PDB file 'foo.pdb'. You could also use real residue numbers rather than 'FIRST' and 'LAST' if you wanted to read only part of each chain. See http://salilab.org/modeller/9v4/manual/node438.html for more information.

	Ben Webb, Modeller Caretaker
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