9m0o | pdb_00009m0o

Crystal structure of OPTN 138-170 in complex with GTP-bound RAB8A1-176 (Q67L)

spinqualitylabelsall models 9m0o, resolution 1.83Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 9m0o is a 2 chain structure with sequence from Homo sapiens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.83Å Ligands: ACT, GOL, GTP, MG Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function RAB8A_HUMAN May be involved in vesicular trafficking and neurotransmitter release. Together with RAB11A, RAB3IP, the exocyst complex, PARD3, PRKCI, ANXA2, CDC42 and DNMBP promotes transcytosis of PODXL to the apical membrane initiation sites (AMIS), apical surface formation and lumenogenesis. Together with MYO5B and RAB11A participates in epithelial cell polarization. Publication Abstract from PubMed Optineurin (OPTN) is a multifunctional adaptor protein involved in vesicular trafficking and selective autophagy. In this study, we investigated the molecular mechanism by which OPTN regulates these distinct processes through the leucine zipper (LZ) domain. OPTN interacts with the active form of RAB8A and closely related RAB proteins (RAB8B and RAB10). We determined the crystal structure of the OPTN-RAB8A complex at 1.83 A resolution and elucidated the specific interaction mechanism between these proteins. Structure-guided mutational analysis at the molecular and cellular level suggested that OPTN interacts with RAB8A on two distinct surfaces. RAB8A-interacting surfaces of OPTN include residues that are located apart from the LZ-forming region. Furthermore, the interaction between OPTN and RAB8A was corroborated by cell biological approaches. Although RAB8A/8B/10 were not essential for mitophagy in experiments using their triple knockout cells, the RAB8A-binding residues of OPTN were critical for the recruitment of ATG9A vesicles. Therefore, our results provide molecular insights into the functional role of the LZ domain of OPTN in regulating vesicular trafficking and selective autophagy. Functional and Structural Insights Into Complex Formation Between OPTN Leucine Zipper Domain and RAB8A.,Okatsu K, Kikuchi R, Matsuda N, Fukai S, Yamano K Genes Cells. 2025 Sep;30(5):e70043. doi: 10.1111/gtc.70043. PMID:40770829 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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