3qom | pdb_00003qom

Crystal structure of 6-phospho-beta-glucosidase from Lactobacillus plantarum

spinqualitylabelsall models 3qom, resolution 1.50Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 3qom is a 1 chain structure with sequence from "lactobacillus_arabinosus"_fred_et_al. "lactobacillus arabinosus" fred et al.. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: ACT, BGC, PO4 NonStd Res: MSE Gene: pbg1, lp_0440 ("Lactobacillus arabinosus" Fred et al.) Activity: 6-phospho-beta-glucosidase, with EC number 3.2.1.86 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Publication Abstract from PubMed In lactic acid bacteria and other bacteria, carbohydrate uptake is mostly governed by phosphoenolpyruvate-dependent phosphotransferase systems (PTSs). PTS-dependent translocation through the cell membrane is coupled with phosphorylation of the incoming sugar. After translocation through the bacterial membrane, the beta-glycosidic bond in 6'-P-beta-glucoside is cleaved, releasing 6-P-beta-glucose and the respective aglycon. This reaction is catalyzed by 6-P-beta-glucosidases, which belong to two glycoside hydrolase (GH) families: GH1 and GH4. Here, the high-resolution crystal structures of GH1 6-P-beta-glucosidases from Lactobacillus plantarum (LpPbg1) and Streptococcus mutans (SmBgl) and their complexes with ligands are reported. Both enzymes show hydrolytic activity towards 6'-P-beta-glucosides. The LpPbg1 structure has been determined in an apo form as well as in a complex with phosphate and a glucose molecule corresponding to the aglycon molecule. The S. mutans homolog contains a sulfate ion in the phosphate-dedicated subcavity. SmBgl was also crystallized in the presence of the reaction product 6-P-beta-glucose. For a mutated variant of the S. mutans enzyme (E375Q), the structure of a 6'-P-salicin complex has also been determined. The presence of natural ligands enabled the definition of the structural elements that are responsible for substrate recognition during catalysis. GH1-family 6-P-beta-glucosidases from human microbiome lactic acid bacteria.,Michalska K, Tan K, Li H, Hatzos-Skintges C, Bearden J, Babnigg G, Joachimiak A Acta Crystallogr D Biol Crystallogr. 2013 Mar;69(Pt 3):451-63. doi:, 10.1107/S0907444912049608. Epub 2013 Feb 16. PMID:23519420 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Beta-glucosidase

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