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【求助】產(chǎn)生psf文件時(shí)出現(xiàn)的Missing atoms for conformation definition 已有2人參與
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分子模擬相關(guān)的 |
新蟲 (初入文壇)
送紅花一朵 |
你好,我看到你的原子數(shù)最后是15120,和你原來原子數(shù)相同嗎?我做psf原子數(shù)會(huì)減少,是什么原因呢? 發(fā)自小木蟲IOS客戶端 |
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找到原因了,也就是我在運(yùn)行prepfiles.tcl這一步后,產(chǎn)生的segA.pdb segB.pdb segC.pdb segD.pdb,在這些文件的通道里還是含有水分子(這一步按照教程的理解,應(yīng)該是蛋白和水分子要分別在不同的pdb文件里),而產(chǎn)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 。 這是到prefiles.tcl這一步的操作流程,大家看看我哪一步需要修改: 1. 通過vmd先找到通道中的水分子,獲取它們的編號 2. 然后生成這些水分子的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 與1j4n.pdb 這一步不用寫腳本,直接把wat.pdb的內(nèi)容(即去頭去尾)拷貝到1j4n.pdb的END前即可。 5. over。 構(gòu)建四聚體(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 然后打開1J4N-ALL.pdb,搜索END,把中間的三個(gè)END及相應(yīng)的雜項(xiàng)去掉,保存為1J4N-ALL.pdb。此時(shí)就生成了四聚體pdb文件。 進(jìn)行psf生成前的文件準(zhǔn)備(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 |
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