期刊
JOURNAL OF MOLECULAR MEDICINE-JMM
卷 78, 期 1, 页码 26-35出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s001090000076
关键词
cyclic ADP-ribose; Ca2+ signaling; second messenger; ryanodine receptor; ADP-ribosyl cyclase
The Ca2+-mobilizing natural compound cyclic ADP-ribose was discovered in sea urchin egg homogenates. Recently the involvement of cyclic ADP-ribose in Ca2+ signaling has been demonstrated in diverse biological systems spanning protozoa, plants, and cells from invertebrate, mammalian, and human sources. ADP-ribosyl cyclases synthesize cyclic ADP-ribose. Several candidate proteins for these enzymes have been proposed, including membrane-bound NAD(+) glycohydrolases such as CD38 and soluble enzyme activities from various tissues and cells. Ca2+ mobilization by cyclic ADP-ribose is believed to proceed via the ryanodine receptor/Ca2+ channel. probably via binding proteins for cyclic ADP-ribose. Several antagonistic derivatives of cyclic ADP-ribose have been synthesized, some of which have been successfully used to demonstrate the involvement of cyclic ADP-ribose in sea urchin egg fertilization, glucose-dependent insulin secretion in pancreatic beta-cells, and activation and proliferation of human T-lymphocytes.
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