AMBER: Antechamber--Boron Parameters

From: <>
Date: Mon, 25 Jun 2007 15:34:30 +0530 (IST)

Dear Amber Users,

I was trying to set the parameters for my ligand (containig a Boron
 for a protein-ligand system. When I run the antechamber
with the command   
$AMBERHOME/exe/antechamber -i
5401_H_attch.pdb -fi pdb -o 5401.prepin -fo
prepi -c bcc -s

I got a message like

Cannot successfully assign bond type for this molecule, please:
double check the structure (the connectivity) and/or
(2)adjust atom
valence penalty parameters in APS.DAT, and/or
(3)increase MAXVASTATE
in define.h and recompile bondtype.C

When I checked the APS.dat
file , I didn't find any defined valence state for
Boron atom. So I
am in worry whether due to this problem I am getting the
message or something else.

Also I tried to find out the
parameters for Boron from the Amber archive,
but failed to get any

Can anybody please help me in this regard.
Any suggestions will be highly appreciated.


Biswa Ranjan Meher
Research Scholar,
IIT Guwahati,

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Received on Wed Jun 27 2007 - 06:07:16 PDT
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