bharat gupta wrote:
ok after reading the documentation, I think the problem is with the ligand topology or parameter. For that I need to simulate the structure in vacuo to check for any unusual changes in topology ...

A topology is a static entity; nothing about it changes. An in vacuo EM of the protein and/or the modified residue itself would be a reasonable start to diagnosing the underlying problem.

-Justin

On Fri, Jun 24, 2011 at 11:23 AM, Justin A. Lemkul <jalem...@vt.edu <mailto:jalem...@vt.edu>> wrote:



    bharat gupta wrote:

        Hi,

        I generated the topology and parameter file for phosphotyrosine
        usin Swiss param and during minimization, it's giving 1,4 cut
        off error. I found that the cut off for 2 paris of atom is more
        than the default value. So, in that what shall I do??


    
http://www.gromacs.org/__Documentation/Errors#1-4___interaction_not_within_cut-off
    
<http://www.gromacs.org/Documentation/Errors#1-4_interaction_not_within_cut-off>
    http://www.gromacs.org/__Documentation/Terminology/__Blowing_Up
    <http://www.gromacs.org/Documentation/Terminology/Blowing_Up>

    Note that this error is incredibly common and you can probably find
    thousands of similar posts in the list archive (hint: search the
    archive).  Most errors are described in the "Errors" page above
    (hint: there's lots of information on the Gromacs site, so always
    check there whenever you have a problem).

    -Justin

-- Bharat
        Ph.D. Candidate
        Room No. : 7202A, 2nd Floor
        Biomolecular Engineering Laboratory
        Division of Chemical Engineering and Polymer Science
        Pusan National University
        Busan -609735
        South Korea
        Lab phone no. - +82-51-510-3680, +82-51-583-8343
        Mobile no. - 010-5818-3680
        E-mail : monu46...@yahoo.com <mailto:monu46...@yahoo.com>
        <mailto:monu46...@yahoo.com <mailto:monu46...@yahoo.com>>


-- ==============================__==========

    Justin A. Lemkul
    Ph.D. Candidate
    ICTAS Doctoral Scholar
    MILES-IGERT Trainee
    Department of Biochemistry
    Virginia Tech
    Blacksburg, VA
    jalemkul[at]vt.edu <http://vt.edu> | (540) 231-9080
    http://www.bevanlab.biochem.__vt.edu/Pages/Personal/justin
    <http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin>

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--
Bharat
Ph.D. Candidate
Room No. : 7202A, 2nd Floor
Biomolecular Engineering Laboratory
Division of Chemical Engineering and Polymer Science
Pusan National University
Busan -609735
South Korea
Lab phone no. - +82-51-510-3680, +82-51-583-8343
Mobile no. - 010-5818-3680
E-mail : monu46...@yahoo.com <mailto:monu46...@yahoo.com>


--
========================================

Justin A. Lemkul
Ph.D. Candidate
ICTAS Doctoral Scholar
MILES-IGERT Trainee
Department of Biochemistry
Virginia Tech
Blacksburg, VA
jalemkul[at]vt.edu | (540) 231-9080
http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin

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