1sm4

Crystal Structure Analysis of the Ferredoxin-NADP+ Reductase from Paprika

spinqualitylabelsall models 1sm4, resolution 2.50Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1sm4 is a 2 chain structure with sequence from Capsicum annuum. This structure supersedes the now removed PDB entry 1fb3. 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: FAD, PO4 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function Q9M4D2_CAPAN 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 cDNA of Capsicum annuum Yolo Wonder (paprika) has been prepared from total cellular RNA, and the complete gene encoding paprika ferredoxin-NADP(+) reductase (pFNR) precursor was sequenced and cloned from this cDNA. Fusion to a T7 promoter allowed expression in Escherichia coli. Both native and recombinant pFNR were purified to homogeneity and crystallized. The crystal structure of pFNR has been solved by Patterson search techniques using the structure of spinach ferredoxin-NADP(+) reductase as search model. The structure was refined at 2.5-A resolution to a crystallographic R-factor of 19.8% (R(free) = 26.5%). The overall structure of pFNR is similar to other members of the ferredoxin-NADP(+) reductase family, the major differences concern a long loop (residues 167-177) that forms part of the FAD binding site and some of the variable loops in surface regions. The different orientation of the FAD binding loop leads to a tighter interaction between pFNR and the adenine moiety of FAD. The physiological redox partners [2Fe-2S]-ferredoxin I and NADP(+) were modeled into the native structure of pFNR. The complexes reveal a protein-protein interaction site that is consistent with existing biochemical data and imply possible orientations for the side chain of tyrosine 362, which has to be displaced by the nicotinamide moiety of NADP(+) upon binding. A reasonable electron transfer pathway could be deduced from the modeled structures of the complexes. Crystal structure of paprika ferredoxin-NADP+ reductase. Implications for the electron transfer pathway.,Dorowski A, Hofmann A, Steegborn C, Boicu M, Huber R J Biol Chem. 2001 Mar 23;276(12):9253-63. Epub 2000 Oct 26. PMID:11053431 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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