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CD59 is a membrane-bound glycoprotein that protects host cells from lysis by inhibiting the terminal pathway of complement, preventing the formation and insertion of the membrane attack complex (MAC). Crystals of bacterially expressed and nonglycosylated recombinant soluble human CD59 have been obtained from three crystallization conditions, each of which gave rise to a distinct crystal form. Each crystal form led to a crystal structure at high resolution (1.15, 1.35 and 1.8 Å). In one of these structures the electron-density map shows an as yet unidentified small molecule in the predicted C8/C9-binding site. The presence/absence of this ligand is linked to alternate conformations of the amino acids implicated in C8/C9 binding. © International Union of Crystallography 2007.

Original publication

DOI

10.1107/S1744309107033477

Type

Journal article

Journal

Acta Crystallographica Section F: Structural Biology and Crystallization Communications

Publication Date

28/07/2007

Volume

63

Pages

648 - 652