3iux

Crystal structure of human MDM2 in complex with a potent miniature protein inhibitor (18-residues)

spinqualitylabelsall models 3iux, resolution 1.65Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 3iux is a 4 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 1.65Å Ligands: ACT, CL, HIA Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Disease MDM2_HUMAN Note=Seems to be amplified in certain tumors (including soft tissue sarcomas, osteosarcomas and gliomas). A higher frequency of splice variants lacking p53 binding domain sequences was found in late-stage and high-grade ovarian and bladder carcinomas. Four of the splice variants show loss of p53 binding. Function MDM2_HUMAN E3 ubiquitin-protein ligase that mediates ubiquitination of p53/TP53, leading to its degradation by the proteasome. Inhibits p53/TP53- and p73/TP73-mediated cell cycle arrest and apoptosis by binding its transcriptional activation domain. Also acts as an ubiquitin ligase E3 toward itself and ARRB1. Permits the nuclear export of p53/TP53. Promotes proteasome-dependent ubiquitin-independent degradation of retinoblastoma RB1 protein. Inhibits DAXX-mediated apoptosis by inducing its ubiquitination and degradation. Component of the TRIM28/KAP1-MDM2-p53/TP53 complex involved in stabilizing p53/TP53. Also component of the TRIM28/KAP1-ERBB4-MDM2 complex which links growth factor and DNA damage response pathways. Mediates ubiquitination and subsequent proteasome degradation of DYRK2 in nucleus. Ubiquitinates IGF1R and promotes it to proteasomal degradation. 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 [Image: see text] The oncoproteins MDM2 and MDMX negatively regulate the activity and stability of the tumor suppressor protein p53, and are important molecular targets for anticancer therapy. Grafting four residues critical for MDM2/MDMX binding to the C-terminal alpha-helix of apamin converts the bee-venom neurotoxin into a novel class of potent p53 activators with potential antitumor activity. Apamin as a template for structure-based rational design of potent peptide activators of p53.,Li C, Pazgier M, Liu M, Lu WY, Lu W Angew Chem Int Ed Engl. 2009;48(46):8712-5. doi: 10.1002/anie.200904550. PMID:19827079 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also MDM2 3D structures

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