2fd2

CRYSTALLOGRAPHIC ANALYSIS OF TWO SITE-DIRECTED MUTANTS OF AZOTOBACTER VINELANDII FERREDOXIN

spinqualitylabelsall models 2fd2, resolution 1.90Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2fd2 is a 1 chain structure with sequence from Atcc 478. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: F3S, SF4 Related: 4fd1, 1fd2 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [FER1_AZOVI] Ferredoxins are iron-sulfur proteins that transfer electrons in a wide variety of metabolic reactions. This ferredoxin could play a role in regulating gene expression by interacting directly with DNA. 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 The crystal structure of the C24A mutant of Azotobacter vinelandii 7Fe ferredoxin (FdI) has been solved and refined at 2.0-A resolution. The structure is isomorphous to native FdI except at the site of mutation where A24 moves toward the [4Fe-4S] cluster. In spite of this inefficient packing results: three of five van der Waals contacts from the S gamma of C24 in native FdI are lost and the remaining two become longer. Consequently, the [4Fe-4S] cluster is either disordered or has a higher temperature factor (B factor) compared to the rest of the C24A FdI molecule. In addition, the entire C24A FdI structure has a higher overall B factor than native FdI. Therefore, in comparison to native FdI, the C24A mutant is isomorphous but exhibits large differences in B factor, especially at the [4Fe-4S] cluster. In contrast, the C20A FdI structure (Martin, A. G., Burgess, B. K., Stout, C. D., Cash, V. L., Dean, D. R., Jensen, G. M., and Stephens, P. J. (1990) Proc. Natl. Acad. Sci. U. S. A. 87, 598-602), which contains large structural rearrangements in the vicinity of the [4Fe-4S] cluster, exhibits essentially no change in B factor. The conformational change observed at residue 24 is similar in both C24A and C20A FdI structures. The solvent accessibility of the Fe atoms in the [3Fe-4S] and [4Fe-4S] clusters is similar in C24A, C20A, and native FdI. Crystallographic analysis of two site-directed mutants of Azotobacter vinelandii ferredoxin.,Soman J, Iismaa S, Stout CD J Biol Chem. 1991 Nov 15;266(32):21558-62. PMID:1939185 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Ferredoxin 3D structures

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