Regulation of cargo exocytosis by a Reps1-Ralbp1-RalA module.
Regulation of cargo exocytosis by a Reps1-Ralbp1-RalA module.
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DOI:
10.1126/sciadv.ade2540
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发表时间:
2023-02-22
期刊:
影响因子:
13.6
通讯作者:
中科院分区:
文献类型:
--
作者:
Surface levels of membrane proteins are determined by a dynamic balance between exocytosis-mediated surface delivery and endocytosis-dependent retrieval from the cell surface. Imbalances in surface protein levels perturb surface protein homeostasis and cause major forms of human disease such as type 2 diabetes and neurological disorders. Here, we found a Reps1-Ralbp1-RalA module in the exocytic pathway broadly regulating surface protein levels. Reps1 and Ralbp1 form a binary complex that recognizes RalA, a vesicle-bound small guanosine triphosphatases (GTPase) promoting exocytosis through interacting with the exocyst complex. RalA binding results in Reps1 release and formation of a Ralbp1-RalA binary complex. Ralbp1 selectively recognizes GTP-bound RalA but is not a RalA effector. Instead, Ralbp1 binding maintains RalA in an active GTP-bound state. These studies uncovered a segment in the exocytic pathway and, more broadly, revealed a previously unrecognized regulatory mechanism for small GTPases, GTP state stabilization. A Reps1-Ralbp1-RalA module promotes cargo exocytosis, in which Ralbp1 regulates RalA through GTP-state stabilization.
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DOI:
10.1073/pnas.1808790115
发表时间:
2018-11-13
影响因子:
11.1
作者:
Bausch-Fluck D;Goldmann U;Müller S;van Oostrum M;Müller M;Schubert OT;Wollscheid B
通讯作者:
Wollscheid B
影响因子:
21.3
作者:
通讯作者:
--
DOI:
10.1016/j.str.2010.05.013
发表时间:
2010-08-11
期刊:
Structure (London, England : 1993)
影响因子:
--
作者:
Fenwick RB;Campbell LJ;Rajasekar K;Prasannan S;Nietlispach D;Camonis J;Owen D;Mott HR
通讯作者:
Mott HR
影响因子:
5.7
作者:
Rajasekar, Karthik V.;Campbell, Louise J.;Nietlispach, Daniel;Owen, Darerca;Mott, Helen R.
通讯作者:
Mott, Helen R.
影响因子:
4.4
作者:
Cox, Juergen;Neuhauser, Nadin;Mann, Matthias
通讯作者:
Mann, Matthias