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jamesxue

新虫 (初入文坛)

[求助] NAMD复合物分子动力学菜鸟求助~~~~!!!

请教各位大侠!
小弟正在学习NAMD做复合物分子动力学,水球和水盒子结果如下,请大侠指导~!
水球结果如下:
TCL: Running for 2500 steps
ERROR: Constraint failure in RATTLE algorithm for atom 1202!
ERROR: Constraint failure; simulation has become unstable.
ERROR: Constraint failure in RATTLE algorithm for atom 480!
ERROR: Constraint failure; simulation has become unstable.
ERROR: Constraint failure in RATTLE algorithm for atom 763!
ERROR: Constraint failure; simulation has become unstable.
ERROR: Constraint failure in RATTLE algorithm for atom 471!
ERROR: Constraint failure; simulation has become unstable.
水盒子结果如下:MINIMIZER SLOWLY MOVING 20075 ATOMS WITH BAD CONTACTS DOWNHILL
听了几个大牛建议,把受体断的地方修补了loop,conf中加入了margin=3,但还是跑散了,不知各位大侠有何建议?小弟跪谢!!

[ Last edited by jiaoyixiong on 2013-3-27 at 08:48 ]
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jiaoyixiong

荣誉版主 (职业作家)

【答案】应助回帖

★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★
感谢参与,应助指数 +1
jamesxue: 金币+30, ★★★很有帮助, 谢谢jiaoyixiong版主建议和提醒!我今晚就试试,到时再回帖请教前辈行吗?辛苦前辈了!~\\(≧▽≦)/~ 2013-03-27 16:21:30
1、你的时间不长是多少?先该小一些试试;
2、是不是用了rigid bond ? 取消试试呗
3、有没有先进行能量最小化呢?建立好了模型,先进行能量最小化,然后 NVT 系宗下平衡模拟一小段时间,如果需要调节压强的话,再 NPT 系宗下调节,完了之后,再继续 NVT 系宗平衡。这样模拟体系才达到比较好的平衡状态。

PS  以后小木虫发帖不要出现 “跪求”等字眼儿,貌似不允许的
2楼2013-03-27 08:48:15
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