[ccp4bb] Ligplot for active sites without any ligand

2010-02-14 Thread Katja Schleider
Dear BBs,

I am looking for a program to plot the network of the residues in the active 
site of my enzyme in 2D. I want to show  how the residues differ in distances 
to each other in several variants. A Program just like ligplot, but also for 
active sites without a ligand. 
Does anybody know such a program or can recommend one?
Thank you very much,

Katja


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[ccp4bb] Alignment of AU?

2010-02-10 Thread Katja Schleider
Hi everybody,

I have a question concerning a sequence alignment with the sequences of my 4 
molecules in the AU. Unfortunately I found out that the sequences of the 4 
monomers do not match exactly. I used the program moleman and it showed me the 
different numbers of atoms for the monomers. I know in Coot there is a sequence 
view button, but I can't see the differing residues. The number of residues 
matches, so I think the mistakes happened when I mutated loops etc. for 
building and refining.
Thanks in advance for any suggestions,

Katja




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[ccp4bb] PDB Validation Report

2010-01-04 Thread Katja Schleider
Dear all,

I just finished my first protein structure. More or less. I'm using right now 
the pdb validation server to check the data and the data look quite well.. The 
only point irretating is following line in the Adit Validation Report: 

The following residues have unexpected configuration of the 
chiral center using C(i) - N(i) - Ca(i) - Cb(i) chirality.

 
Residue  Chain  SequenceImproper  Details
 LYS  A  470 22.18   Expecting L Found L OUTSIDE RANGEI 
am not sure what this means and what I should do. What is outside the L range?  
I would be thankful for any advice.

Thanks,

Katja



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[ccp4bb] off-topic: crystal optimization without buffer

2009-11-19 Thread Katja Schleider
Hi everybody,

sorry for my off-topic question. I got small initial crystals in 200mM NaSulfat 
and 20% PEG 3350.
There is no buffer in this condition. How can I optimize these crystals? Just 
vary the PEG concentration?  Or should I add a buffer; or vary the pH of the 
buffer the proteinsolution was in?

Thank you and best regards,

Katja



  

[ccp4bb] structure validation tools

2009-10-21 Thread Katja Schleider
Hi everybody,

I solved my first crystalstructure and now want to publish it. But how do I 
know the structure is ready for publication and deposition in the pdb. We can 
explain our theory with the structure but which factors I have to regard to 
publish nothing wrong or bad. Can anybody tell how many outliers are allowed as 
long as they are in a well defined density? I found several validation tools in 
coot, but I would like to be sure on what I have to emphasize.

Thank you very much in advance,

Katja


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[ccp4bb] anisotropic data

2009-10-05 Thread Katja Schleider
Hi everybody,

is there a way to improve crystals that diffract strongly anisotropic? We got 
data between 2.5 and 4.0 A and scala  says we should cut these data at 3.9 A. 
It's such a... I want to solve this structure!


greetings

Katja


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