Crystal Structure of the Complex of Brugia Malayi Cyclophilin and Cyclosporin A.
Ellis, P.J., Carlow, C.K., Ma, D., Kuhn, P.(2000) Biochemistry 39: 592
- PubMed: 10642184 
- DOI: https://doi.org/10.1021/bi991730q
- Primary Citation of Related Structures:  
1C5F - PubMed Abstract: 
The resistance of the human parasite Brugia malayi to the antiparasitic activity of cyclosporin A (CsA) may arise from the presence of cyclophilins with relatively low affinity for the drug. The structure of the complex of B. malayi cyclophilin (BmCYP-1) and CsA, with eight independent copies in the asymmetric unit, has been determined at a resolution of 2.7 A. The low affinity of BmCYP-1 for CsA arises from incomplete preorganization of the binding site so that the formation of a hydrogen bond between His132 of BmCYP-1 and N-methylleucine 9 of CsA is associated with a shift in the backbone of approximately 1 A in this region.
Organizational Affiliation: 
Stanford Synchrotron Radiation Laboratory, SLAC, P.O. Box 4249, Bin 69, Stanford University, Stanford, California 94309, USA.