A calcium-inhibited Drosophila adenylyl cyclase. Academic Article uri icon

Overview

abstract

  • Mammals possess a family of transmembrane, G-protein-responsive adenylyl cyclase isoforms (tmACs) encoded by distinct genes differing in their patterns of expression and modes of biochemical regulation. Our previous work confirmed that Drosophila melanogaster also possesses a family of tmAC isoforms defining the fly as a suitable genetic model for discerning mammalian tmAC function. We now describe a Drosophila tmAC, DAC39E, which employs a novel means for regulating its expression; differential exon utilization results in a developmental switch in DAC39E protein. DAC39E protein sequence is most closely related to mammalian type III AC, and it is predominantly expressed in the central nervous system (CNS) and olfactory organs, suggesting a role in processing sensory signaling inputs. DAC39E catalytic activity is inhibited by micromolar concentrations of calcium; therefore, DAC39E is oppositely regulated by calcium compared to the only other tmAC shown to be expressed in the Drosophila CNS, Rutabaga AC. The presence of both positively and negatively regulated tmACs suggests a complex mode of cross-talk between cAMP and calcium signal transduction pathways in the fly CNS.

publication date

  • February 2, 2000

Research

keywords

  • Adenylyl Cyclase Inhibitors
  • Calcium
  • Drosophila melanogaster

Identity

Scopus Document Identifier

  • 0033979352

Digital Object Identifier (DOI)

  • 10.1016/s0167-4889(99)00155-x

PubMed ID

  • 10656970

Additional Document Info

volume

  • 1495

issue

  • 2