1d6a

STRUCTURE OF POKEWEED ANTIVIRAL PROTEIN COMPLEXED WITH GUANINE

spinqualitylabelsall models 1d6a, resolution 2.10Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1d6a is a 2 chain structure with sequence from Phytolacca americana. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: GUN Related: 1qci Activity: rRNA N-glycosylase, with EC number 3.2.2.22 Resources: FirstGlance, OCA, RCSB, PDBsum 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 Pokeweed antiviral protein (PAP) is a ribosome-inactivating protein (RIP), which enzymatically removes a single adenine base from a conserved, surface exposed loop sequence of ribosomal rRNA. We now present unprecedented experimental evidence that PAP can release not only adenine but guanine as well from Escherichia coli rRNA, albeit at a rate 20 times slower than for adenine. We also report X-ray structure analysis and supporting modeling studies for the interactions of PAP with guanine. Our modeling studies indicated that PAP can accommodate a guanine base in the active site pocket without large conformational changes. This prediction was experimentally confirmed, since a guanine base was visible in the active site pocket of the crystal structure of the PAP-guanine complex. X-ray crystallographic analysis of the structural basis for the interaction of pokeweed antiviral protein with guanine residues of ribosomal RNA.,Kurinov IV, Rajamohan F, Venkatachalam TK, Uckun FM Protein Sci. 1999 Nov;8(11):2399-405. PMID:10595542 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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