Re: how to quantify and visualize the flow of water into a protein

From: Maxim Belkin (mbelkin_at_ks.uiuc.edu)
Date: Tue Jul 08 2014 - 19:20:12 CDT

That's true. You can write your own tcl script to analyze water flux: simply track displacements of water oxygens.

On Jul 8, 2014, at 7:04 PM, Thomas Evangelidis <tevang3_at_gmail.com> wrote:

> Hi
>
> I thought about water density too, but it doesn't give you much information about water influx. Water is always present at the entrance points but gets in and out spontaneously. This is not captured by water density.
>
> Στις 9 Ιουλ 2014 2:40 ΠΜ, ο χρήστης "Maxim Belkin" <mbelkin_at_ks.uiuc.edu> έγραψε:
> Hi Thomas,
>
> This question is not really related to NAMD. A better place for 'analysis' type of questions is VMD mailing list.
>
> Anyway, If your trajectory fits into RAM, you can use VMD volmap plugin to compute water density distribution averaged across the entire simulation. However, manual scripting might be required if "entry points" move around.
>
> Maxim
>
>
> On Jul 8, 2014, at 6:20 PM, Thomas Evangelidis <tevang3_at_gmail.com> wrote:
>
>> Greetings,
>>
>> Is anyone aware of any tool that helps visualize and/or quantify the flow of water into a transporter from an MD trajectory? I have a long trajectory of a transporter and want to find the main entrance points of water. I can see by manual inspection the various entrance points but it is difficult to decide which is/are the most important.
>>
>> thanks,
>> Thomas
>>
>> --
>> ======================================================================
>> Thomas Evangelidis
>> PhD student
>> University of Athens
>> Faculty of Pharmacy
>> Department of Pharmaceutical Chemistry
>> Panepistimioupoli-Zografou
>> 157 71 Athens
>> GREECE
>> email: tevang_at_pharm.uoa.gr
>> tevang3_at_gmail.com
>>
>> website: https://sites.google.com/site/thomasevangelidishomepage/
>>
>

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