Dear Mengxia,
the lower part could well be a sulfate ion. For the upper part, it is
difficult to guess from a static picture. Unfortunately, at the
resolution you have there are no programs which can build an unknown
small molecule from scratch according to the density. You have to guess,
fit it
Hi,
It could be all sorts of things, but the one that for some reason is stuck
in my mind is isopentenyl phosphate (phosphate, not pyrophosphate!). Of
course w/o seeing the density in 3D this is just a guess.
Artem
Dear All,
When I was refining my structure, I found some unmodeled blobs,
Hi,
If you could send in stereo mode of the density you want to get suggestion,
it will be convenient for the well trained eyes.
S.Jayashankar
Research Student
Institute for Biophysical Chemistry
Hannover Medical School
Germany.
On Tue, Feb 10, 2009 at 3:16 PM, ar...@xtals.org wrote:
Hi,
Hi Mengxiao,
The density sure reminds me of a nucleotide.
Note the pi-pi stacking of the planar part
between Tyr and Phe, and in the third stereo
picture you attached, projections at what could
be the 2 and 6 positions remind me of Guanine...
plus there are Arg, Lys, etc. pointing toward
It could be purine or pyrimidine ring stacked between the Phe an Tyr. check pdb
3etr or 3eub of xanthine oxidase binding purine substrates between two Phe at
the active site.
Hongnan Cao
UCR
Date: Tue, 10 Feb 2009 00:23:54 -0500From: lvmengx...@gmail.comsubject:
[ccp4bb] unknown density
