Re: [ccp4bb] PDB format survey?

2007-08-10 Thread Ethan Merritt
Behalf Of Santarsiero, Bernard D. Can I ask a dumb question? Just curious... Why are we now limited to 80 columns? In the old days, that was a limit with Fortran and punched cards. Can a record (whatever it's called now) be as long as we wish? Instead of compressing a lot on a

Re: [ccp4bb] real-space vs. reciprocal space refinement

2007-08-10 Thread Anastassis Perrakis
On 10 Aug 2007, at 18:59, Pavel Afonine wrote: Hi Mike, the best is to do both in a loop: for cycle in cycles: - do real space refinement; - do reciprocal space refinement Well - thats what we all do - right ? The real space refinement can be done either with the tools from Chapman at

Re: [ccp4bb] PDB format survey?

2007-08-10 Thread Herbert J. Bernstein
If you want to give it a try, I switched the buttons to an alternate server. It is slower than the one we were using, but it will give you the idea. Try http://biomol.dowling.edu/WPDB/ put in a PDB id code in the box near the top of the page and click on CLICK HERE for WPDB version ... The

Re: [ccp4bb] PDB format survey?

2007-08-10 Thread Warren DeLano
That's easy: Backward compatibility, both in terms of old programs and old data. The idea is to maintain as much interoperability as possible. -Original Message- From: CCP4 bulletin board [mailto:[EMAIL PROTECTED] On Behalf Of Santarsiero, Bernard D. Sent: Friday, August 10, 2007

Re: [ccp4bb] PDB format survey?

2007-08-10 Thread Warren DeLano
Correction: Scratch what I wrote -- the PDB format does now support a formal charge field in columns 79-80 (1+,2+,1- etc.). Hooray! Thus, adoption of the CONECT valency convention is all it would take for us to be able to convey chemically-defined structures using the PDB format. I'll

Re: [ccp4bb] real-space vs. reciprocal space refinement

2007-08-10 Thread Pavel Afonine
Hi Mike, the best is to do both in a loop: for cycle in cycles: - do real space refinement; - do reciprocal space refinement Have a look at this very nice paper: Acta Cryst. (1999). D55, 835-845 Critical initial real-space refinement in the structure determination of arginine kinase G.

Re: [ccp4bb] PDB format survey?

2007-08-10 Thread Ralf W. Grosse-Kunstleve
Dear George, I like your hybrid_ 36 scheme and will implement it and the two character hain IDs PDB file columns 21 and 22, right justified) when I next update HELXL. Of course I will need to do some programming because of the SHELX zero dependency' philosophy, but it seems to me to be

Re: [ccp4bb] Spam: Re: [ccp4bb] real-space vs. reciprocal space refinement

2007-08-10 Thread Anastassis Perrakis
On 10 Aug 2007, at 20:12, Pavel Afonine wrote: Anastassis Perrakis wrote: On 10 Aug 2007, at 18:59, Pavel Afonine wrote: Hi Mike, the best is to do both in a loop: for cycle in cycles: - do real space refinement; - do reciprocal space refinement Well - thats what we all do - right ?

Re: [ccp4bb] PDB format survey?

2007-08-10 Thread Herbert J. Bernstein
Actually, everything proposed with break some software. The real question is one of how much value the community gains from how much of a change. mmCIF was one proposal that would solve the problem, but which met a lot of resistance. The change in atom serial numbers to strings is another

[ccp4bb] New buccaneer...

2007-08-10 Thread Kevin Cowtan
A couple of buccaneer releases have gone by since I last made an announcement: release 0.7.2: - new 'correlation mode' gives better results after MR or when completing an initial model. - sequenced fragments are now renumbered to match the position in the final sequence. release

Re: [ccp4bb] a question about procheck

2007-08-10 Thread Paul Emsley
If I may expand on what Eleanor said. The issue is not the atom labels, but that the atom labels are in the right place (i.e. the refer to the right atoms). There is an IUPAC convention on the torsion of CB-CG-CD-OE1 (for GLU). The torsion should be between -90 and +90. Yours is not.

[ccp4bb] Job offer: Protein Crystallographer (with Ph.D)

2007-08-10 Thread Blaesse, Michael
PROTEROS is a leading service-provider for the preparation and three-dimensional structural analysis of proteins for structure-guided drug discovery. Our work contributes to fast and rational development of new therapeutic compounds. Since its foundation in 1998, PROTEROS is a continuously

Re: [ccp4bb] refmac problem in running arp/warp

2007-08-10 Thread Tommi Kajander
Quoting Anastassis Perrakis [EMAIL PROTECTED]: On Aug 9, 2007, at 15:02, Tommi Kajander wrote: so, a) WHAT IS GAMMA?? gamma is possibly the letter of the greek alphabet that has had most abuse from scientists. thats what i thought...

Re: [ccp4bb] SAD: Refine against anomalous data

2007-08-10 Thread Eleanor Dodson
ping sun wrote: Thanks for your answer. I guess I did not make it clear. I used the data file for refinement which is also used for phasing (peak_anomalous.hkl). Traditionally, people will reprocess the same set of data for refinement (rescale it in hkl2000 without using the option

Re: [ccp4bb] real-space vs. reciprocal space refinement

2007-08-10 Thread Pavel Afonine
Anastassis Perrakis wrote: On 10 Aug 2007, at 18:59, Pavel Afonine wrote: Hi Mike, the best is to do both in a loop: for cycle in cycles: - do real space refinement; - do reciprocal space refinement Well - thats what we all do - right ? The real space refinement can be done either with

Re: [ccp4bb] PDB format survey?

2007-08-10 Thread George M. Sheldrick
Dear Ralf, I like your hybrid_ 36 scheme and will implement it and the two character chain IDs PDB file columns 21 and 22, right justified) when I next update SHELXL. Of course I will need to do some programming because of the SHELX 'zero dependency' philosophy, but it seems to me to be

Re: [ccp4bb] PDB format survey?

2007-08-10 Thread Kevin Cowtan
I support CCP4 adopting the hybrid36 and 2 char chain id extensions too. If no-one else steps up to do it, I'll try and patch mmdb to support it when I get time. Kevin George M. Sheldrick wrote: I like your hybrid_ 36 scheme and will implement it and the two character chain IDs PDB file

[ccp4bb] technical position: protein expression for structural biology

2007-08-10 Thread Emsley Jonas
Research Technician (Fixed-term) Protein expression for Structural Biology Applications are invited for the above post from highly motivated individuals with a strong interest in eukaryotic protein expression, protein biochemistry and protein purification. The research project is funded by

[ccp4bb] Covalent link

2007-08-10 Thread Scapin, Giovanna
Hello there How do I tell Refmac that I have an inhibitor covalently bound to a Ser residue? I am using the ccp4i interface and this is what I've came up with (looking through the archives) but it does not seem to work 1) I made the inhibitor mon_lib.cif 2) I made the following

Re: [ccp4bb] SAD: Refine against anomalous data

2007-08-10 Thread Sanishvili, Ruslan
Folks, Don't take this as an argument with software people - I have a side note about structures. Back in the day when I used to solve Structural Genomics structures, we almost always knew substitution rate from masspec and Se always refined to lesser occupancy. Could it be the decay instead?