Re: [ccp4bb] Bond lengths and angles used by Molprobity for ANP (AMPPNP)

2014-09-15 Thread Tim Gruene
Hi Andrew, the ccp4 ANP.cif entry for C4'-C5' is 1.528A, but both the Phenix and Grade cif list 1.508A. The distance in 2JDI is 1.53, so if molprobity relies on one of the latter two sources, this might be the source of the flag. Also some shelxl dictionary lists 1.509A, so it's 3:1 for the flag

Re: [ccp4bb] Bond lengths and angles used by Molprobity for ANP (AMPPNP)

2014-09-15 Thread Dale Tronrud
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 In general the word outlier should not be read as error. It simply means that this thing is interesting. You have to judge, based on all information at hand, if it is interesting because it is rare or because it is wrong. It is true that the

Re: [ccp4bb] Bond lengths and angles used by Molprobity for ANP (AMPPNP)

2014-09-15 Thread Huw Jenkins
On 15 Sep 2014, at 15:24, Andrew Leslie and...@mrc-lmb.cam.ac.uk wrote: This would suggest that the standard dictionary that Molprobity uses has changed, but I cannot find any reference to this on the Molprobity pages. I would be very grateful if anyone can

Re: [ccp4bb] Bond lengths and angles used by Molprobity for ANP (AMPPNP)

2014-09-15 Thread Andrew Leslie
Dear Huw, Many thanks for this information. I had seen the notice about Molprobity using CCTBX validation metrics, but I mistakenly thought that Phenix used the CCP4 monomer library, which I think was true once but is clearly no longer the case. Given the very small sigma values associated

Re: [ccp4bb] Bond lengths and angles used by Molprobity for ANP (AMPPNP)

2014-09-15 Thread Ian Tickle
Andrew, GRADE gives: ANP C5 C4aromatic 1.388 0.011 ANP C5 C4 C3 126.8 0.7 i.e. essentially the same as Phenix, so I would go with that. The CCP4 values definitely could do with a re-examination: I've never heard of a double bond with a length of 1.49, and

Re: [ccp4bb] Bond lengths and angles used by Molprobity for ANP (AMPPNP)

2014-09-15 Thread Paul Emsley
On 15/09/14 18:05, Dale Tronrud wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 On 9/15/2014 9:42 AM, Andrew Leslie wrote: Dear Huw, Many thanks for this information. I had seen the notice about Molprobity using CCTBX validation metrics, but I mistakenly thought that Phenix used the

Re: [ccp4bb] Bond lengths and angles used by Molprobity for ANP (AMPPNP)

2014-09-15 Thread Ian Tickle
On 15 September 2014 17:48, Ian Tickle ianj...@gmail.com wrote: ANP C5 C4 C3 126.8 0.7 Oops sorry, typo: ANP C5 C4 N3 126.8 0.7 I.