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kingtin

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arthurii

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ghcacj(½ð±Ò+1):лл 2010-12-10 10:56:28
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zh1987hs(½ð±Ò+4):лл 2010-12-09 17:42:12
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Originally posted by kingtin at 2010-12-08 14:23:43:
ÏÖÔÚÓÐMSµÄPDBÎļþ£¬µ«ÊÇÔÚNAMD/VMDÖв»ÄÜÓã¬ÇëÎÊÔõÑù¸Ä¶¯²ÅÄÜÈÃPDBÎļþÔÚNAMD/VMDÖÐʹÓã¿

ÔÚVMDÖжÁȡӦ¸ÃÎÊÌâ²»´óµÄ, ÔÚopenµÄʱºò, Ñ¡ÔñÎļþ¸ñʽΪPDB.

ÔÚNAMDÖÐʹÓÃ, ÄÇÊÇÐèÒªÐ޸ĵÄ. ×¢ÒâÑо¿Ò»ÏÂNAMDµÄÀý×Ó, ¿´¿´ËüÐèÒªµÄÎļþ, ÊÇÔõÑùµÄ¸ñʽ.

ÕâÊÇÎÒÒÔǰµÄÒ»¶Î±Ê¼Ç, Ï£Íû¶ÔÄãÄÜÓÐһЩ°ïÖú.

As we know, NAMD needs four files to run the job, namely,
(a) a force field in either CHARMM or X_PLOR format;
(b) a PSF file in X_PLOR format to describe the molecularstructure;
(c) a PDB file to describe the initial coordinates;
(d) the configuration file

We could easily handle with the force field file and the configuration file, but as far as the PDB and PSF files are concerned, they take me a lot of time.

My procedures are as follows:
1. generate the (9,9) CNT by Material Studio, and convert it into pdb file by VEGA ZZ, so I get 99.pdb;

2. generate the water box and conver it into pdb file by VEGA ZZ, so here I have h2o.pdb;

3. write a small fortran code to combine the 99.pdb and h2o.pdb into one pdb file, namely, 9_9_cooh_combined.pdb;

4. convert the final pdb file into psf file by VEGA ZZ, and I have to use Ultraedit to modify the charge values and the atom index, anyhow, we will have 9_9_cooh_combined.psf.

As you know, it is really painful and time consuming in the step 3 and 4.
Life, Love, Laugh.
3Â¥2010-12-09 00:47:48
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zhaoyanfei

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zh1987hs(½ð±Ò+1): лл 2011-02-21 22:43:22

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1dubo

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