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EC Number Crystallization (Commentary)
Display the word mapDisplay the reaction diagram Show all sequences 3.4.21.43crystal structures of the C3b homologue cobra venom factor CVF in complex with C5, and in complex with C5 and the inhibitor SSL7, both at 4.3 A resolution. The structures reveal a parallel two-point attachment between C5 and CVF, where the presence of SSL7 only slightly affects the C5-CVF interface, explaining the IgA dependence for SSL7-mediated inhibition of C5 cleavage. CVF functions as a relatively rigid binding scaffold inducing a conformational change in C5, which positions its cleavage site in proximity to the serine protease Bb
Display the word mapDisplay the reaction diagram Show all sequences 3.4.21.43Mg2+-bound C2a, hanging drop vapor diffusion method, 22°C, 0.002 ml of 20 mg/ml protein solution is mixed with 0.002 ml of well solution containing 20% w/v polyethylene glycol 10000, 0.1 M HEPES, pH 7.5, and 0.0004 ml of 0.3 M glycyl-glycyl-glycine, 3-7 days, X-ray diffraction structure determination and analysis at 1.9-2.3 A resolution
Display the word mapDisplay the reaction diagram Show all sequences 3.4.21.43N-terminal segment C2b, by the hanging-drop vapor-diffusion method, to 1.8 A resolution. Space group P31 with unit-cell parameters a=b= 60.09 A and c = 61.69 A. Conformational changes of C2, C2a and C2b during C3 convertase C4bC2a formation
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