The versatile nature of the calcium-permeable cation channel TRPP2.
TRPP2 is a member of the transient receptor potential (TRP) superfamily of cation channels, which is mutated in autosomal dominant polycystic kidney disease (ADPKD). TRPP2 is thought to function with polycystin 1-a large integral protein-as part of a multiprotein complex involved in transducing Ca(2+)-dependent information. TRPP2 has been implicated in various biological functions including cell proliferation, sperm fertilization, mating behaviour, mechanosensation and asymmetric gene expression. Although its function as a Ca(2+)-permeable cation channel is well established, its precise role in the plasma membrane, the endoplasmic reticulum and the cilium is controversial. Recent studies suggest that TRPP2 function is highly dependent on the subcellular compartment of expression, and is regulated by many interactions with adaptor proteins. This review summarizes the most pertinent evidence about the properties of TRPP2 channels, focusing on the compartment-specific functions of mammalian TRPP2.
Giamarchi
Aurélie
A
Laboratoire de Neurophysiologie Cellulaire, CNRS, UMR 6150, Faculté de Médecine, IFR Jean Roche, Boulevard Pierre Dramard, 13916 Marseille Cedex 20, France.
Padilla
Françoise
F
Coste
Bertrand
B
Raoux
Matthieu
M
Crest
Marcel
M
Honoré
Eric
E
Delmas
Patrick
P
D000595:Amino Acid Sequence; D000818:Animals; D001692:Biological Transport / Q000502:physiology; D002118:Calcium / Q000378:metabolism*; D015220:Calcium Channels / Q000235:genetics / Q000502:physiology*; D008954:Models, Biological; D008969:Molecular Sequence Data; D017386:Sequence Homology, Amino Acid; D050396:TRPP Cation Channels / Q000378:metabolism*
D015220:Calcium Channels; D050396:TRPP Cation Channels; D002118:Calcium