Re: [ccp4bb] Calculating volume of Ligands

2008-01-16 Thread harry powell
Hi A simple trick that small molecule crystallographers have been using for decades is based on the average volume of non-hydrogen atoms being about 18 Å^3 (this is close to being more-or-less correct for C, N and O, and the presence of one or two S or P atoms usually makes little

Re: [ccp4bb] Calculating volume of Ligands

2008-01-16 Thread Eleanor Dodson
It isnt a bad approximation for any organic compound to take the number of atoms including hydrogens, and multiply it by 10A^^3 Eleanor Dodson Rajan Pillai wrote: Hi All, Can anyone tell me any program that calculates voume of a ligand? Moreover, is there also any program that can calculate

Re: [ccp4bb] Calculating volume of Ligands

2008-01-16 Thread Isaac Westwood
To: CCP4BB@JISCMAIL.AC.UK Subject: [ccp4bb] Calculating volume of Ligands Hi All, Can anyone tell me any program that calculates voume of a ligand? Moreover, is there also any program that can calculate the volume of a ligand from its coordinates? Thanks, Rajan.

[ccp4bb] Calculating volume of Ligands

2008-01-15 Thread Rajan Pillai
Hi All, Can anyone tell me any program that calculates voume of a ligand? Moreover, is there also any program that can calculate the volume of a ligand from its coordinates? Thanks, Rajan.

Re: [ccp4bb] Calculating volume of Ligands

2008-01-15 Thread Tim Gruene
ccp4 includes a program called 'volume' that does this. see 'man volume' for a description, or $CCP4/html/volume.html Tim -- Tim Gruene Institut fuer anorganische Chemie Tammannstr. 4 D-37077 Goettingen GPG Key ID = A46BEE1A On Tue, 15 Jan 2008, Rajan Pillai wrote: Hi All, Can anyone