Re: [ccp4bb] Big difference between anomalous map and density modification map

2010-10-18 Thread Wu, Mousheng
iology Department of Biochemistry and Molecular Biology The University of Texas Medical School at Houston 6431 Fannin Street, Houston, TX, USA, 77030 From: Clemens Vonrhein [vonrh...@globalphasing.com] Sent: Monday, October 18, 2010 8:05 AM To: Wu, Mousheng

[ccp4bb] Big difference between anomalous map and density modification map

2010-10-17 Thread Wu, Mousheng
Dear All, I have a MAD dataset at 4Å and shelxD can find clear-cut 10 solutions (my protein has 12 methionines). I ran autosharp to refine them followed by density modification. After density modification, I ran solvent flattening. Then I calculated the anomalous map using the phase from sharp

[ccp4bb] domains missing

2007-08-13 Thread Wu, Mousheng
Hi, ccp4 community, I am solving my protein (300 aa) structure using molecular replacement. The space group is P622. There is only one molecule in the ASU. The protein is supported to have three domains. We have solved the domain 1 (120aa) structure; therefore we tried to use it as a model to solv

[ccp4bb] struggling with molecular replacement

2007-07-26 Thread Wu, Mousheng
hi, everyone! I am struggling with my crystal structure in a very big unit cell. my protein is about 16KDa. probably there are about 20 molecules in the asymmetric unit. I tried to use molecular replacement to solve the structure. However, there is only one NMR structure available for me. The

[ccp4bb] oxalate

2007-07-26 Thread Wu, Mousheng
As Anthony and Jeremy suggested, I tried to fit oxalate into the density. It perfectly matches the density. Thank all of you. I should read more papers now to make it sense.

Re: [ccp4bb] unknown density in structure

2007-07-26 Thread Wu, Mousheng
There are four molecules in the asymmetric unit. And this density is present in every molecules. -Original Message- From: ANA MARIA MISIC [mailto:[EMAIL PROTECTED] Sent: Thursday, July 26, 2007 5:24 PM To: Wu, Mousheng Subject: Re: [ccp4bb] unknown density in structure Hi Mousheng

[ccp4bb] unknown density in structure

2007-07-26 Thread Wu, Mousheng
Hi, everyone, I am recently solving a structure at 1.8A. After I fitted all residues into the model, I found that there was an extra density in a pocket consisted of E, N, R and other hydrophobic residues. The density is strong and connected like a butterfly. I checked the crystallization cond