1iym

RING-H2 finger domain of EL5

spinqualitylabelsall models 1iym, 15 NMR models Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1iym is a 1 chain structure with sequence from Oryza sativa. Full experimental information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: ZN Resources: FirstGlance, OCA, RCSB, PDBsum Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMed EL5, a RING-H2 finger protein, is rapidly induced by N-acetylchitooligosaccharides in rice cell. We expressed the EL5 RING-H2 finger domain in Escherichia coli and determined its structure in solution by NMR spectroscopy. The EL5 RING-H2 finger domain consists of two-stranded beta-sheets (beta1, Ala(147)-Phe(149); beta2, Gly(156)-His(158)), one alpha-helix (Cys(161)-Leu(166)), and two large N- and C-terminal loops. It is stabilized by two tetrahedrally coordinated zinc ions. This structure is similar to that of other RING finger domains of proteins of known function. From structural analogies, we inferred that the EL5 RING-H2 finger is a binding domain for ubiquitin-conjugating enzyme (E2). The binding site is probably formed by solvent-exposed hydrophobic residues of the N- and C-terminal loops and the alpha-helix. We demonstrated that the fusion protein with EL5-(96-181) and maltose-binding protein (MBP) was polyubiquitinated by incubation with ubiquitin, ubiquitin-activating enzyme (E1), and a rice E2 protein, OsUBC5b. This supported the idea that the EL5 RING finger domain is essential for ubiquitin-ligase activity of EL5. By NMR titration experiments, we identified residues that are critical for the interaction between the EL5 RING-H2 finger and OsUBC5b. We conclude that the RING-H2 finger domain of EL5 is the E2 binding site of EL5. High precision NMR structure and function of the RING-H2 finger domain of EL5, a rice protein whose expression is increased upon exposure to pathogen-derived oligosaccharides.,Katoh S, Hong C, Tsunoda Y, Murata K, Takai R, Minami E, Yamazaki T, Katoh E J Biol Chem. 2003 Apr 25;278(17):15341-8. Epub 2003 Feb 14. PMID:12588869 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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