Summary

Name RAB3A
Full Name Ras-related protein Rab-3A
Synonyms RAB3A_HUMAN |
Primary ID P20336
Links - -
Type protein
Relations 11
Pathways Neurotransmitters release
Function Small GTP-binding protein that plays a central role in regulated exocytosis and secretion. Controls the recruitment, tethering and docking of secretory vesicles to the plasma membrane (By similarity). Upon stimulation, switches to its active GTP-bound form, cycles to vesicles and recruits effectors such as RIMS1, RIMS2, Rabphilin-3A/RPH3A, RPH3AL or SYTL4 to help the docking of vesicules onto the plasma membrane (By similarity). Upon GTP hydrolysis by GTPase-activating protein, dissociates from the vesicle membrane allowing the exocytosis to proceed (By similarity). Stimulates insulin secretion through interaction with RIMS2 or RPH3AL effectors in pancreatic beta cells (By similarity). Regulates calcium-dependent lysosome exocytosis and plasma membrane repair (PMR) via the interaction with 2 effectors, SYTL4 and myosin-9/MYH9 (PubMed:27325790). Acts as a positive regulator of acrosome content secretion in sperm cells by interacting with RIMS1 (PubMed:22248876, PubMed:30599141). Plays also a role in the regulation of dopamine release by interacting with synaptotagmin I/SYT (By similarity).

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Relations

Regulator Mechanism target score
+ up-regulates quantity by expression img/indirect-activation.png transcriptional regulation RAB3A 0.2
Publications: 1 Organism: Homo Sapiens
+ up-regulates activity img/direct-activation.png relocalization RAB3A 0.286
Publications: 1 Organism: Homo Sapiens
+ up-regulates activity img/direct-activation.png relocalization RAB3A 0.799
Publications: 1 Organism: Homo Sapiens
Pathways:Neurotransmitters release
+ up-regulates activity img/direct-activation.png binding RAB3A 0.601
Publications: 1 Organism: Homo Sapiens
Pathways:Neurotransmitters release
+ up-regulates activity img/direct-activation.png relocalization RAB3A 0.758
Publications: 1 Organism: Homo Sapiens
+ up-regulates activity img/direct-activation.png lipidation RAB3A 0.552
Publications: 1 Organism: Homo Sapiens
+ up-regulates img/indirect-activation.png Dense-core_vesicle_exocytosis 0.7
Publications: 1 Organism: Homo Sapiens
Pathways:Neurotransmitters release
+ down-regulates activity img/direct_inhibition.png gtpase-activating protein RAB3A 0.453
Publications: 1 Organism: Rattus Norvegicus
Tissue: Brain
+ up-regulates activity img/direct-activation.png guanine nucleotide exchange factor RAB3A 0.407
Publications: 1 Organism: Rattus Norvegicus
Tissue: Brain
+ up-regulates activity img/direct-activation.png lipidation RAB3A 0.642
Publications: 1 Organism: Homo Sapiens
+ up-regulates quantity by expression img/indirect-activation.png transcriptional regulation RAB3A 0.2
Publications: 1 Organism: Homo Sapiens