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Publication Abstract from PubMed
Metal ions often stabilize intermolecular contacts between macromolecules, thereby promoting crystallization. When interpreting a medium-resolution electron-density map of the catalytic domain of human sentrin-specific protease 1 (SENP1), a strong feature indicative of an ordered divalent cation was noted. This was assigned as Co(2+), an essential component of the crystallization mixture. The ion displays tetrahedral coordination by Glu430 and His640 from one molecule and the corresponding residues from a symmetry-related molecule. Analysis of the data derived from a previous structure of SENP1 suggested that Co(2+) had been overlooked and re-refinement supported this conclusion. High-throughput automated re-refinement protocols also failed to mark the Co(2+) position, supporting the requirement for the incorporation of as much information as possible to enhance the value of such protocols.
The role of Co(2)+ in the crystallization of human SENP1 and comments on the limitations of automated refinement protocols.,Rimsa V, Eadsforth T, Hunter WN Acta Crystallogr Sect F Struct Biol Cryst Commun. 2011 Apr 1;67(Pt 4):442-5. Epub, 2011 Mar 24. PMID:21505236[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
↑ Rimsa V, Eadsforth T, Hunter WN. The role of Co(2)+ in the crystallization of human SENP1 and comments on the limitations of automated refinement protocols. Acta Crystallogr Sect F Struct Biol Cryst Commun. 2011 Apr 1;67(Pt 4):442-5. Epub, 2011 Mar 24. PMID:21505236 doi:10.1107/S1744309111005835
