2uz3 | pdb_00002uz3

Crystal Structure of Thymidine Kinase with dTTP from U. urealyticum

spinqualitylabelsall models 2uz3, resolution 2.50Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2uz3 is a 4 chain structure with sequence from Ureaplasma urealyticum. This structure supersedes the now removed PDB entry 1xmr. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.5Å Ligands: MG, TTP, ZN Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function KITH_UREPA 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 Cytosolic thymidine kinase 1, TK1, is a well known cell-cycle-regulated enzyme of importance in nucleotide metabolism as well as an activator of antiviral and anticancer drugs such as 3'-azido-3'-deoxythymidine (AZT). We have now determined the structures of the TK1 family, the human and Ureaplasma urealyticum enzymes, in complex with the feedback inhibitor dTTP. The TK1s have a tetrameric structure in which each subunit contains an alpha/beta-domain that is similar to ATPase domains of members of the RecA structural family and a domain containing a structural zinc. The zinc ion connects beta-structures at the root of a beta-ribbon that forms a stem that widens to a lasso-type loop. The thymidine of dTTP is hydrogen-bonded to main-chain atoms predominantly coming from the lasso loop. This binding is in contrast to other deoxyribonucleoside kinases where specific interactions occur with side chains. The TK1 structure differs fundamentally from the structures of the other deoxyribonucleoside kinases, indicating a different evolutionary origin. Structures of thymidine kinase 1 of human and mycoplasmic origin.,Welin M, Kosinska U, Mikkelsen NE, Carnrot C, Zhu C, Wang L, Eriksson S, Munch-Petersen B, Eklund H Proc Natl Acad Sci U S A. 2004 Dec 28;101(52):17970-5. Epub 2004 Dec 20. PMID:15611477 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Thymidine kinase 3D structures

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