In an attempt to isolate protein kinase A anchoring proteins (AKAPs) involved in vasopressin-mediated water reabsorbtion, the complete sequence of the human AKAP Ht31 was determined and a partial cDNA of its rat orthologue (Rt31) was cloned. The Ht31 cDNA includes the estrogen receptor cofactor Brx and the RhoA GDP/GTP exchange factor protolymphoid blast crisis (Lbc) sequences. The Ht31 gene was assigned to chromosome 15 (region q24-q25). It encodes Ht31 and the smaller splice variants Brx and proto-Lbc. A protein of the predicted size of Ht31 (309 kDa) was detected in human mammary carcinoma and HeLa cells. Anti-Ht31/Rt31 antibodies immunoprecipitated RhoA from primary cultured rat renal inner medullary collecting duct cells, indicating an interaction between the AKAP and RhoA in vivo. These results suggest that Ht31/ Rt31. represent a new type of AKAP, containing both an anchoring and a catalytic domain, which appears to be capable of modulating the activity of an interacting partner. Ht31/Rt31 have the potential to integrate Rho and protein kinase A signaling pathways, and thus, are prime candidates to regulate vasopressin-mediated water reabsorbtion. (C) 2001 Federation of European Biochemical Societies
HT31: THE first protein kinase A anchoring protein to integrate protein kinase A and Rho signaling / KLUSSMANN E; EDEMIR B; PEPPERLE B; TAMMA G; HENN V; KLAUSCHENZ E; HUNDSRUCKER C; MARIC K; ROSENTHAL W. - In: FEBS LETTERS. - ISSN 0014-5793. - 507:3(2001), pp. 264-268.
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Titolo: | HT31: THE first protein kinase A anchoring protein to integrate protein kinase A and Rho signaling |
Autori: | |
Data di pubblicazione: | 2001 |
Rivista: | |
Citazione: | HT31: THE first protein kinase A anchoring protein to integrate protein kinase A and Rho signaling / KLUSSMANN E; EDEMIR B; PEPPERLE B; TAMMA G; HENN V; KLAUSCHENZ E; HUNDSRUCKER C; MARIC K; ROSENTHAL W. - In: FEBS LETTERS. - ISSN 0014-5793. - 507:3(2001), pp. 264-268. |
Handle: | http://hdl.handle.net/11586/72587 |
Appare nelle tipologie: | 1.1 Articolo in rivista |