Using a conformation-dependent stereochemical library improves crystallographic refinement of proteins.
Tronrud, D.E., Berkholz, D.S., Karplus, P.A.(2010) Acta Crystallogr D Biol Crystallogr 66: 834-842
- PubMed: 20606264 
- DOI: 10.1107/S0907444910019207
- Primary Citation of Related Structures:  
3LO8 - PubMed Abstract: 
The major macromolecular crystallographic refinement packages restrain models to ideal geometry targets defined as single values that are independent of molecular conformation. However, ultrahigh-resolution X-ray models of proteins are not consistent with this concept of ideality and have been used to develop a library of ideal main-chain bond lengths and angles that are parameterized by the phi/psi angle of the residue [Berkholz et al ...