Two members of a widely expressed subfamily of hormone-stimulated adenylyl cyclases.


Journal Article

cDNA encoding a hormone- and guanine nucleotide-stimulated adenylyl cyclase [ATP pyrophosphate-lyase (cyclizing), EC] (type 6) from rat liver and kidney has been cloned and expressed. This enzyme is stimulated by forskolin, guanosine 5'-[gamma-thio]triphosphate, and isoproterenol plus GTP but is not stimulated by beta gamma subunits of guanine nucleotide-binding proteins. A second form (type 5), which is 75% similar to type 6, has also been cloned. Both types 5 and 6 cDNAs have multiple messages. PCR-based detection of the mRNA for the type 5 and 6 enzymes indicates that both are widely distributed. Homology analyses indicate at least four distinct subfamilies of guanine nucleotide stimulatory protein-regulated adenylyl cyclases. Types 5 and 6 enzymes define one distinct subfamily of mammalian adenylyl cyclases. Diversity of one guanine nucleotide-binding protein-regulated effector may allow different modes of regulation of cell-surface signal transmission.

Full Text

Cited Authors

  • Premont, RT; Chen, J; Ma, HW; Ponnapalli, M; Iyengar, R

Published Date

  • October 1992

Published In

Volume / Issue

  • 89 / 20

Start / End Page

  • 9809 - 9813

PubMed ID

  • 1409703

Pubmed Central ID

  • 1409703

Electronic International Standard Serial Number (EISSN)

  • 1091-6490

International Standard Serial Number (ISSN)

  • 0027-8424

Digital Object Identifier (DOI)

  • 10.1073/pnas.89.20.9809


  • eng