You can use the methodology described here and develop your own parameters:

Development of new Cd2+ and Pb2+ Lennard-Jones parameters for liquid simulations Author(s): de Araujo AS (de Araujo, Alexandre S.), Sonoda MT (Sonoda, Milton T.), Piro OE (Piro, Oscar E.), Castellano EE (Castellano, Eduardo E.) Source: JOURNAL OF PHYSICAL CHEMISTRY B Volume: 111 Issue: 9 Pages: 2219-2224


Regards

**************************************************************
Alexandre Suman de Araujo                                    *
Faculdade de Ciências Farmacêuticas de Ribeirão Preto        *
Universidade de São Paulo                                    *
Dep. de Física e Química                                     *
Grupo de Física Biológica     * e-mail: [email protected]*
Av. do Café, s/n°             * e-mail: [email protected]  *
CEP: 14040-903                * Phone: +55 (16) 3602-4172    *
Ribeirão Preto, SP, Brasil    * Phone: +55 (16) 3602-4222    *
**************************************************************


Anirban Ghosh escreveu:

Hi ALL,

My protein system contains Hg ions. As a result GROMACS4.0.5 is throwing the error
"Fatal error:
Residue 'HG' not found in residue topology database"

How to solve tis issue? Can I add required parameters in the ions.itp file? If so can someone kindly provide the required parameters for Hg2+ ions.


Thanks a lot in advance.

Regards,


*Anirban Ghosh*
*Grade Based Engineer
Bioinformatics Team
Centre for Development of Advanced Computing (C-DAC)
Pune, India
*


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