6s6t

Structure of Azospirillum brasilense Glutamate Synthase in a4b3 oligomeric stateStructure of Azospirillum brasilense Glutamate Synthase in a4b3 oligomeric state

6s6t, resolution 4.10Å Show:Asymmetric Unit Biological Assembly Structural highlights 6s6t is a 7 chain structure with sequence from Atcc 29145. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: Gene: gltB (ATCC 29145), gltD (ATCC 29145) Activity: Glutamate synthase (NADPH), with EC number 1.4.1.13 Experimental data: Check Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Publication Abstract from PubMed Bacterial NADPH-dependent glutamate synthase (GltS) is a complex iron-sulfur flavoprotein that catalyzes the reductive synthesis of two L-Glu molecules from L-Gln and 2-oxo-glutarate. GltS functional unit hosts an alpha-subunit (alphaGltS) and a beta-subunit (betaGltS) that assemble in different alphabeta oligomers in solution. Here, we present the cryo-electron microscopy structures of Azospirillum brasilense GltS in four different oligomeric states (alpha4beta3, alpha4beta4, alpha6beta4 and alpha6beta6, in the 3.5- to 4.1-A resolution range). Our study provides a comprehensive GltS model that details the inter-protomeric assemblies and allows unequivocal location of the FAD cofactor and of two electron transfer [4Fe-4S](+1,+2) clusters within betaGltS. Cryo-EM Structures of Azospirillum brasilense Glutamate Synthase in Its Oligomeric Assemblies.,Swuec P, Chaves-Sanjuan A, Camilloni C, Vanoni MA, Bolognesi M J Mol Biol. 2019 Aug 29. pii: S0022-2836(19)30520-0. doi:, 10.1016/j.jmb.2019.08.011. PMID:31473159 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.