Re: [ccp4bb] Ligand chirality error

2012-01-30 Thread Eleanor Dodson
Do remember you can assign chirality as both.. This can be useful as otherwise the refinement programs force the requested chirality and espec at low resolution it can be hard to see any indication of error.. .. Eleanor On 01/27/2012 09:06 AM, herman.schreu...@sanofi.com wrote: Dear Debajyoti

Re: [ccp4bb] Ligand chirality error

2012-01-27 Thread Paul Emsley
On 27/01/12 09:45, herman.schreu...@sanofi.com wrote: Does this also update the cif dictionary, or stays the change inside coot? It stays within Coot. It does not update the cif dictionary - IMHO, that would be a Bad Thing - maybe you are just experimenting. It creates new set of restraints

Re: [ccp4bb] Ligand chirality error

2012-01-27 Thread Herman . Schreuder
] Ligand chirality error On 27/01/12 07:25, Debajyoti Dutta wrote: > > > > How to check the presence of improper chirality of a fitted ligand. With Coot, Validate -> Incorrect Chiral Volumes > Is there any way to get rid of such error. Extensions -> Modelling -> Invert this Chiral Centre. Paul.

Re: [ccp4bb] Ligand chirality error

2012-01-27 Thread Paul Emsley
On 27/01/12 07:25, Debajyoti Dutta wrote: How to check the presence of improper chirality of a fitted ligand. With Coot, Validate -> Incorrect Chiral Volumes Is there any way to get rid of such error. Extensions -> Modelling -> Invert this Chiral Centre. Paul.

Re: [ccp4bb] Ligand chirality error

2012-01-27 Thread Herman . Schreuder
Dear Debajyoti, The way I check the chirality is to compare the fitted compound with the structural formula. In coot, I rotate the ligand such that it has the same orientation as in the formula and check that the "out of plane" group goes in the right direction. However, it happens quite often th