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1: Proc Natl Acad Sci U S A. 1992 Sep 15;89(18):8774-8.Click here to read Links

Cloning and characterization of a sixth adenylyl cyclase isoform: types V and VI constitute a subgroup within the mammalian adenylyl cyclase family.

Katsushika S, Chen L, Kawabe J, Nilakantan R, Halnon NJ, Homcy CJ, Ishikawa Y.

Department of Pharmacology, College of Physicians and Surgeons, Columbia University, New York, NY 10032.

A sixth member of the mammalian adenylyl cyclase family has been isolated from a canine cardiac cDNA library. This isoform is more highly homologous to type V than to the other adenylyl cyclase types; sequence similarity is apparent even in the transmembrane regions where the greatest divergence among the types exists. Type VI mRNA expression is most abundant in heart and brain; however, unlike type V, a low level of expression is also observed in a variety of other tissues examined. Type VI adenylyl cyclase can be stimulated by NaF, guanosine 5'-[gamma-thio]triphosphate, and forskolin but not by Ca2+/calmodulin, whereas it is inhibited by adenosine and its analogues. Comparison of both their structural and biochemical properties suggests that types V and VI constitute a distinct subgroup of the mammalian adenylyl cyclase family.

PMID: 1528892 [PubMed - indexed for MEDLINE]

PMCID: PMC50003