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nufang19a

金虫 (正式写手)


[交流] 【求助】产生psf文件时出现的Missing atoms for conformation definition 已有2人参与

在产生psf文件时,结束后。shell出现了这样的信息:


这是什么原因??是原始pdb文件的原因吗??
这是我产生psf的脚本:
进行psf生成前的文件准备(prepfiles.tcl):
mol load pdb 1J4N-ALL.pdb
foreach S {A B C D} {
set seg [atomselect top "segname $S and chain A"]
$seg writepdb seg$S.pdb
$seg delete
}
foreach S {A B C D} {
set wat [atomselect top "segname $S and resname HOH and within 100 of chain A"]
$wat writepdb crystwat$S.pdb
$wat delete
}
exit
产生psf文件(build.psf):
package require psfgen
topology ../top_all27_prot_lipid.rtf
pdbalias residues HIS HSE
pdbalias atom ILE CD1 CD
pdbalias atom HOH O OH2
pdbalias resid HOH TIP3
foreach S {A B C D} {
segment $S {
pdb seg$S.pdb
}
coordpdb seg$S.pdb $S
regenerate angles dihedrals
segment WC$S {
auto none
pdb crystwat$S.pdb
}
coordpdb crystwat$S.pdb WC$S
}
guesscoord
writepdb aqp0.pdb
writepdb aqp0.psf
exit
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nufang19a

金虫 (正式写手)


★ ★ ★ ★ ★
御剑江湖(金币+5): 谢谢 2011-04-18 10:12:08
找到原因了,也就是我在运行prepfiles.tcl这一步后,产生的segA.pdb segB.pdb segC.pdb segD.pdb,在这些文件的通道里还是含有水分子(这一步按照教程的理解,应该是蛋白和水分子要分别在不同的pdb文件里),而产生的crystwatA.pdb crystwatB.pdb crystwatC.pdb crystwatD.pdb是正常的,也就是只含有通道里的水分子 。
这是到prefiles.tcl这一步的操作流程,大家看看我哪一步需要修改:
1. 通过vmd先找到通道中的水分子,获取它们的编号

2. 然后生成这些水分子的pdb文件(例子):

mol load pdb 1J4N.pdb

set model [atomselect top "water and (resid 301 or resid 302 or resid 303 or resid 304)"]

$model writepdb wat.pdb

exit

3. 生成蛋白的pdb文件:

mol load pdb 1J4N.pdb

set model [atomselect top protein]

$model writepdb 1j4n.pdb

exit

4. 合并wat.pdb 与1j4n.pdb

这一步不用写脚本,直接把wat.pdb的内容(即去头去尾)拷贝到1j4n.pdb的END前即可。

5. over。

构建四聚体(buildtetra.tcl):

mol load pdb 1j4n.pdb
set all [atomselect top all]
$all set segname A
$all writepdb 1J4N-A.pdb
$all delete

set sel [atomselect top all]
$sel set segname B
$sel move {{-1.0 0.0 0.0 93.331} {0.0 -1.0 0.0 93.331} {0.0 0.0 1.0 0.0} {0.0 0.0 0.0 1.0}}
$sel writepdb 1J4N-B.pdb
$sel delete

mol delete top
mol load pdb 1j4n.pdb
set sel [atomselect top all]
$sel set segname C
$sel move {{0.0 -1.0 0.0 93.331} {1.0 0.0 0.0 0.0} {0.0 0.0 1.0 0.0} {0.0 0.0 0.0 1.0}}
$sel writepdb 1J4N-C.pdb
$sel delete

mol delete top
mol load pdb 1j4n.pdb
set sel [atomselect top all]
$sel set segname D
$sel move {{0.0 1.0 0.0 0.0} {-1.0 0.0 0.0 93.331} {0.0 0.0 1.0 0.0} {0.0 0.0 0.0 1.0}}
$sel writepdb 1J4N-D.pdb
$sel delete

cat 1J4N-A.pdb 1J4N-B.pdb 1J4N-C.pdb 1J4N-D.pdb > 1J4N-ALL.pdb
然后打开1J4N-ALL.pdb,搜索END,把中间的三个END及相应的杂项去掉,保存为1J4N-ALL.pdb。此时就生成了四聚体pdb文件。


进行psf生成前的文件准备(prepfiles.tcl):
mol load pdb 1J4N-ALL.pdb
foreach S {A B C D} {
set seg [atomselect top "segname $S and chain A"]
$seg writepdb seg$S.pdb
$seg delete
}

foreach S {A B C D} {
set wat [atomselect top "segname $S and resname HOH and within 100 of chain A"]
$wat writepdb crystwat$S.pdb
$wat delete
}
exit
3楼2011-04-18 09:58:21
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nufang19a

金虫 (正式写手)


自己顶上去,期待回答
2楼2011-04-16 16:32:00
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nufang19a

金虫 (正式写手)



御剑江湖(金币+1): 谢谢 2011-04-18 10:12:16
应该是这一句需要修改吧
set seg [atomselect top "segname $S and chain A"]
4楼2011-04-18 10:01:51
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nufang19a

金虫 (正式写手)


御剑江湖: 谢谢 2011-04-18 11:14:49
应该是这一句需要修改吧
set seg [atomselect top "segname $S and chain A"]
5楼2011-04-18 10:19:14
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