GNA13 encodes Gα13, a subunit of heterotrimeric G proteins that functions as a modulator in transmembrane signaling systems 1. The protein activates the RhoA/ROCK signaling pathway by binding and activating RhoGEFs, which subsequently affects cell migration, adhesion, and morphology 1. GNA13 demonstrates context-dependent roles in different cancers. In glioblastoma, it acts as a tumor suppressor by inhibiting metastasis through the ERKs/FOXO3 signaling pathway, with downregulation correlating with poor prognosis 2. However, GNA13 mutations are frequently observed in various B-cell lymphomas, including diffuse large B-cell lymphoma (DLBCL), Burkitt lymphoma, and follicular lymphoma, where they contribute to distinct genetic subtypes 345. In high-grade B-cell lymphoma, GNA13 mutations represent genetic heterogeneity bridging features between DLBCL and Burkitt lymphoma 6. The protein also plays a role in melanocyte function, where gain-of-function mutations hyperactivate RHOA/ROCK and YAP signaling pathways, leading to cell shape alterations and affecting melanosome transfer 1. These findings highlight GNA13's diverse roles in cellular signaling and its clinical significance across multiple disease contexts.