6uml | pdb_00006uml

Structural Basis for Thalidomide Teratogenicity Revealed by the Cereblon-DDB1-SALL4-Pomalidomide Complex

spinqualitylabelsall models 6uml, resolution 3.58Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 6uml is a 3 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 3.58Å Ligands: Y70, ZN Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function DDB1_HUMAN Required for DNA repair. Binds to DDB2 to form the UV-damaged DNA-binding protein complex (the UV-DDB complex). The UV-DDB complex may recognize UV-induced DNA damage and recruit proteins of the nucleotide excision repair pathway (the NER pathway) to initiate DNA repair. The UV-DDB complex preferentially binds to cyclobutane pyrimidine dimers (CPD), 6-4 photoproducts (6-4 PP), apurinic sites and short mismatches. Also appears to function as a component of numerous distinct DCX (DDB1-CUL4-X-box) E3 ubiquitin-protein ligase complexes which mediate the ubiquitination and subsequent proteasomal degradation of target proteins. The functional specificity of the DCX E3 ubiquitin-protein ligase complex is determined by the variable substrate recognition component recruited by DDB1. DCX(DDB2) (also known as DDB1-CUL4-ROC1, CUL4-DDB-ROC1 and CUL4-DDB-RBX1) may ubiquitinate histone H2A, histone H3 and histone H4 at sites of UV-induced DNA damage. The ubiquitination of histones may facilitate their removal from the nucleosome and promote subsequent DNA repair. DCX(DDB2) also ubiquitinates XPC, which may enhance DNA-binding by XPC and promote NER. DCX(DTL) plays a role in PCNA-dependent polyubiquitination of CDT1 and MDM2-dependent ubiquitination of TP53 in response to radiation-induced DNA damage and during DNA replication. DCX(ERCC8) (the CSA complex) plays a role in transcription-coupled repair (TCR). May also play a role in ubiquitination of CDKN1B/p27kip when associated with CUL4 and SKP2. Publication Abstract from PubMed Thalidomide-dependent degradation of the embryonic transcription factor SALL4 by the CRL4(CRBN) E3 ubiquitin ligase is a plausible major driver of thalidomide teratogenicity. The structure of the second zinc finger of SALL4 in complex with pomalidomide, cereblon and DDB1 reveals the molecular details of recruitment. Sequence differences and a shifted binding position relative to Ikaros offer a path to the rational design of cereblon-binding drugs with reduced teratogenic risk. Crystal structure of the SALL4-pomalidomide-cereblon-DDB1 complex.,Matyskiela ME, Clayton T, Zheng X, Mayne C, Tran E, Carpenter A, Pagarigan B, McDonald J, Rolfe M, Hamann LG, Lu G, Chamberlain PP Nat Struct Mol Biol. 2020 Apr;27(4):319-322. doi: 10.1038/s41594-020-0405-9. Epub, 2020 Apr 6. PMID:32251415 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also DNA damage-binding protein

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