1uvk

The structural basis for RNA specificity and Ca2 inhibition of an RNA-dependent RNA polymerase phi6p2 dead-end complex

spinqualitylabelsall models 1uvk, resolution 2.45Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1uvk is a 3 chain structure with sequence from Pseudomonas virus phi6. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.45Å Ligands: GTP, MG, MN, POP Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function RDRP_BPPH6 Publication Abstract from PubMed The RNA-dependent RNA polymerase of bacteriophage phi6 transcribes mRNA from the three segments of the dsRNA viral genome. We have cocrystallized RNA oligonucleotides with the polymerase, revealing the mode of binding of RNA templates. This binding is somewhat different from that previously seen for DNA oligomers, leading to additional RNA-protein hydrogen bonds, consistent with a preference for RNA. Activation of the RNA/polymerase complex by the addition of substrate and Mg2+ initiates a single round of reaction within the crystal to form a dead-end complex that partially collapses within the enzyme active site. By replacing Mg2+ with Ca2+, we have been able to capture the inhibited complex which shows distortion that explains the structural basis for the inhibition of such polymerases by Ca2+. The structural basis for RNA specificity and Ca2+ inhibition of an RNA-dependent RNA polymerase.,Salgado PS, Makeyev EV, Butcher SJ, Bamford DH, Stuart DI, Grimes JM Structure. 2004 Feb;12(2):307-16. PMID:14962391 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also RNA polymerase 3D structures

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