2z59 | pdb_00002z59

Complex Structures of Mouse Rpn13 (22-130aa) and ubiquitin

spinqualitylabelsall models 2z59, 10 NMR models Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2z59 is a 2 chain structure with sequence from Human and Lk3 transgenic mice. Full experimental information is available from OCA. For a guided tour on the structure components use FirstGlance. Related: 1d3z, 2hth, 2r2y Gene: Adrm1 (LK3 transgenic mice), Rps27a, Uba80, Ubcep1 (HUMAN) Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum Function [ADRM1_MOUSE] Functions as a proteasomal ubiquitin receptor. Recruits the deubiquitinating enzyme UCHL5 at the 26S proteasome and promotes its activity. 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 Targeted protein degradation is largely performed by the ubiquitin-proteasome pathway, in which substrate proteins are marked by covalently attached ubiquitin chains that mediate recognition by the proteasome. It is currently unclear how the proteasome recognizes its substrates, as the only established ubiquitin receptor intrinsic to the proteasome is Rpn10/S5a (ref. 1), which is not essential for ubiquitin-mediated protein degradation in budding yeast. In the accompanying manuscript we report that Rpn13 (refs 3-7), a component of the nine-subunit proteasome base, functions as a ubiquitin receptor, complementing its known role in docking de-ubiquitinating enzyme Uch37/UCHL5 (refs 4-6) to the proteasome. Here we merge crystallography and NMR data to describe the ubiquitin-binding mechanism of Rpn13. We determine the structure of Rpn13 alone and complexed with ubiquitin. The co-complex reveals a novel ubiquitin-binding mode in which loops rather than secondary structural elements are used to capture ubiquitin. Further support for the role of Rpn13 as a proteasomal ubiquitin receptor is demonstrated by its ability to bind ubiquitin and proteasome subunit Rpn2/S1 simultaneously. Finally, we provide a model structure of Rpn13 complexed to diubiquitin, which provides insights into how Rpn13 as a ubiquitin receptor is coupled to substrate deubiquitination by Uch37. Ubiquitin docking at the proteasome through a novel pleckstrin-homology domain interaction.,Schreiner P, Chen X, Husnjak K, Randles L, Zhang N, Elsasser S, Finley D, Dikic I, Walters KJ, Groll M Nature. 2008 May 22;453(7194):548-52. PMID:18497827 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Proteasome Ubiquitin

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