Re: [AMBER] protons

From: David A Case <david.case.rutgers.edu>
Date: Mon, 9 Apr 2018 21:42:38 -0400

On Mon, Apr 09, 2018, Carlos Romero wrote:
>
> Could someone help me insert H+ atom as an ion?

H+ is just a proton, and there is no straightforward molecular mechanics
way of describing an entity with no electrons (and hence no "size"
comparable to other ions.)

What is called "H+" is actually some combination of H3O+, H5O2+, etc.
Amber doesn't offer any built-in way to describe such species. Don't
forget that under most biochemical conditions (say pH 5 and greater),
the concentration of free "H+" ions is *very* small.

Basically, a hydrogen ion is really quite different from a lithium or
sodium ion.

...regards...dac


_______________________________________________
AMBER mailing list
AMBER.ambermd.org
http://lists.ambermd.org/mailman/listinfo/amber
Received on Mon Apr 09 2018 - 19:00:04 PDT
Custom Search