3tgb | pdb_00003tgb

Crystal structure of L130R mutant of Nitrophorin 4 from Rhodnius prolixus complexed with imidazole at pH 7.4

spinqualitylabelsall models 3tgb, resolution 1.35Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 3tgb is a 1 chain structure with sequence from Rhopr. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: HEM, IMD Related: 3tga, 3tgc Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [NP4_RHOPR] Heme-based protein that deliver nitric oxide gas (NO) to the victim while feeding, resulting in vasodilation and inhibition of platelet aggregation. Also bind tightly to histamine, which is released by the host to induce wound healing (By similarity). Publication Abstract from PubMed Prestidigitation: In a mutant of the heme protein nitrophorin 4, the first binding of guanidine to iron in a porphyrin is observed. The protein pocket has two effects that aid this binding: its overall structure holds the ligands together providing binding energy from the chelate effect and it facilitates the deprotonation of the highly basic guanidine residue. Guanidine-Ferroheme Coordination in the Mutant Protein Nitrophorin 4(L130R).,He C, Fuchs MR, Ogata H, Knipp M Angew Chem Int Ed Engl. 2012 Apr 27;51(18):4470-3. doi: 10.1002/anie.201108691., Epub 2012 Feb 14. PMID:22334402 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Nitrophorin

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