Sf. Bellon et al., CRYSTAL-STRUCTURE OF THE RAG1 DIMERIZATION DOMAIN REVEALS MULTIPLE ZINC-BINDING MOTIFS INCLUDING A NOVEL ZINC BINUCLEAR CLUSTER, Nature structural biology, 4(7), 1997, pp. 586-591
The crystal structure of the dimerization domain of the V(D)J recombin
ation-activating protein, RAG1, was solved using zinc anomalous scatte
ring. The structure reveals an unusual combination of multi-class zinc
-binding motifs, including a zinc RING finger and a C2H2 zinc finger,
that together form a single structural domain. The domain also contain
s a unique zinc binuclear cluster in place of a normally mononuclear z
inc site in the RING finger. Together, four zinc ions help organize th
e entire domain, including the two helices that form the dimer interfa
ce.