RHOA, Transforming protein RhoA
Enzyme Classification 188.8.131.52
Also Known as
RHOA_HUMAN, RHOA, ARH12, ARHA, RHO12
Small GTPase which cycles between an active GTP-bound and an inactive GDP-bound state. Mainly associated with cytoskeleton organization, in active state binds to a variety of effector proteins to regulate cellular responses such cytoskeletal dynamics, cell migration and cell cycle. Regulates a signal transduction pathway linking plasma membrane receptors to the assembly of focal adhesions and actin stress fibers (PubMed:8910519, PubMed:9121475). Involved in a microtubule-dependent signal that is required for the myosin contractile ring formation during cell cycle cytokinesis (PubMed:16236794, PubMed:12900402). Plays an essential role in cleavage furrow formation. Required for the apical junction formation of keratinocyte cell-cell adhesion (PubMed:20974804, PubMed:23940119). Essential for the SPATA13-mediated regulation of cell migration and adhesion assembly and disassembly (PubMed:19934221). The MEMO1-RHOA-DIAPH1 signaling pathway plays an important role in ERBB2-dependent stabilization of microtubules at the cell cortex. It controls the localization of APC and CLASP2 to the cell membrane, via the regulation of GSK3B activity. In turn, membrane-bound APC allows the localization of the MACF1 to the cell membrane, which is required for microtubule capture and stabilization (PubMed:20937854). Regulates KCNA2 potassium channel activity by reducing its location at the cell surface in response to CHRM1 activation; promotes KCNA2 endocytosis (PubMed:9635436, PubMed:19403695). May be an activator of PLCE1 (PubMed:16103226). In neurons, involved in the inhibiton of the initial spine growth. Upon activation by CaMKII, modulates dendritic spine structural plasticity by relaying CaMKII transient activation to synapse-specific, long-term signaling (By similarity)., (Microbial infection) Serves as a target for the yopT cysteine peptidase from Yersinia pestis, vector of the plague. Interacts with ARHGEF28 (By similarity). Interacts (via GTP-bound form) with RIPOR1 (via N-terminus); this interaction links RHOA to STK24 and STK26 kinases (PubMed:27807006). Interacts with RIPOR2 (via active GTP- or inactive GDP-bound forms) isoform 1 and isoform 2; these interactions are direct, block the loading of GTP to RHOA and decrease upon chemokine CCL19 stimulation in primary T lymphocytes (PubMed:25588844). Binds PRKCL1, ROCK1 and ROCK2 (PubMed:10388627, PubMed:8617235, PubMed:8641286). Interacts with ARHGEF2, ARHGEF3, NET1 and RTKN (PubMed:10940294, PubMed:12221096, PubMed:9857026). Interacts with PLCE1 and AKAP13 (PubMed:11696353, PubMed:12900402). Interacts with DIAPH1 (PubMed:23325789). Interacts (in the constitutively activated, GTP-bound form) with DGKQ (PubMed:10066731). Interacts with RACK1; enhances RHOA activation (PubMed:20499158). Interacts with PKP4; the interaction is detected at the midbody (PubMed:17115030). Interacts (GTP-bound form preferentially) with PKN2; the interaction stimulates autophosphorylation and phosphorylation of PKN2 (PubMed:20974804, PubMed:9121475). Interacts with ARHGDIA; this interaction inactivates and stabilizes RHOA (PubMed:20400958). Interacts with ARHGDIB. Interacts (GTP-bound form) with KCNA2 (via cytoplasmic N-terminal domain) (PubMed:9635436).