From chemistry-request -A_T- server.ccl.net Wed Jul 10 10:05:49 2002 Received: from mail.fqspl.com.pl ([212.244.147.20]) by server.ccl.net (8.11.6/8.11.0) with SMTP id g6AE5np13806 for ; Wed, 10 Jul 2002 10:05:49 -0400 Received: (qmail 2809 invoked from network); 10 Jul 2002 14:12:50 -0000 Received: from unknown (HELO test) (212.244.147.4) by mail.fqspl.com.pl with SMTP; 10 Jul 2002 14:12:50 -0000 Message-ID: <009901c2281b$46bb8e40$320a0a0a&$at$&test> From: "Victor Anisimov" To: Subject: Accuracy question Date: Wed, 10 Jul 2002 16:05:31 +0200 MIME-Version: 1.0 Content-Type: text/plain; charset="koi8-r" Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4133.2400 Dear CCLers, Based on my short investigation I could learn that HF/6-31G* is the most popular method for electrostatic parameter optimization in Amber, Charmm, OPLS and perhaps in other prominent force fields with the aim of the description of molecular electrostatic potential of protein systems. Here I'd like to ask experts in this field. Is it the correct conclusion I derived or perhaps other quantum-chemistry methods are more popular for the purpose of electrostatic parameters development, e.g. databases of ESP charges of amino acids or similar. Thank you in advance. I will summarise the responses promptly. With best regards, Victor. -- Victor Anisimov FQS Poland, Krakow.