ADP-ribosyl cyclase synthesizes the secondary messenger cyclic ADP-rib
ose from NAD(+). Diffraction quality crystals of the enzyme from ovote
stes of Aplysia californica have been obtained. Crystallographic analy
sis of this enzyme will yield insight into the mode of binding of the
novel cyclic nucleotide and the mechanism by which NAD(+) is cyclized.
(C) 1996 Wiley-Liss, Inc.