5auk

Crystal structure of the Ga-substituted Ferredoxin

spinqualitylabelsall models 5auk, resolution 1.62Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 5auk is a 1 chain structure with sequence from Synechocystis sp. PCC 6803 substr. Kazusa. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.62Å Ligands: BEN, GAK, SO4 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function FER_SYNY3 Ferredoxins are iron-sulfur proteins that transfer electrons in a wide variety of metabolic reactions. Publication Abstract from PubMed In chloroplasts, ferredoxin (Fd) is reduced by Photosystem I (PSI) and oxidized by Fd-NADP(+) reductase (FNR) that is involved in NADP(+) reduction. To understand the structural basis for the dynamics and efficiency of the electron transfer reaction via Fd, we complementary used X-ray crystallography and nuclear magnetic resonance (NMR) spectroscopy. In the NMR analysis of the formed electron transfer complex with Fd, the paramagnetic effect of the [2Fe-2S] cluster of Fd prevented us from detecting the NMR signals around the cluster. To solve this problem, the paramagnetic iron-sulfur cluster was replaced with a diamagnetic metal cluster. We determined the crystal structure of the Ga-substituted Fd (GaFd) from Synechocystis sp. PCC6803 at 1.62 A resolution and verified its functional complementation using affinity chromatography. NMR analysis of the interaction sites on GaFd with PSI (molecular mass of approximately 1 MDa) and FNR from Thermosynechococcus elongatus was achieved with high-field NMR spectroscopy. With reference to the interaction sites with FNR of Anabaena sp. PCC 7119 from the published crystal data, the interaction sites of Fd with FNR and PSI in solution can be classified into two types: (1) the core hydrophobic residues in the proximity of the metal center and (2) the hydrophilic residues surrounding the core. The former sites are shared in the Fd:FNR and Fd:PSI complex, while the latter ones are target-specific and not conserved on the residual level. X-ray Structure and Nuclear Magnetic Resonance Analysis of the Interaction Sites of the Ga-Substituted Cyanobacterial Ferredoxin.,Mutoh R, Muraki N, Shinmura K, Kubota-Kawai H, Lee YH, Nowaczyk MM, Rogner M, Hase T, Ikegami T, Kurisu G Biochemistry. 2015 Oct 6;54(39):6052-61. doi: 10.1021/acs.biochem.5b00601. Epub, 2015 Sep 30. PMID:26348494 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Ferredoxin 3D structures

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