4xpl

The crystal structure of Campylobacter jejuni N-acetyltransferase PseH in complex with acetyl coenzyme A

spinqualitylabelsall models 4xpl, resolution 1.95Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 4xpl is a 1 chain structure with sequence from Campylobacter jejuni subsp. jejuni PT14. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.95Å Ligands: ACO Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function A0A0J9X276_CAMJU Publication Abstract from PubMed Campylobacter jejuni is a bacterium that uses flagella for motility and causes worldwide acute gastroenteritis in humans. The C. jejuni N-acetyltransferase PseH (cjPseH) is responsible for the third step in flagellin O-linked glycosylation and plays a key role in flagellar formation and motility. cjPseH transfers an acetyl group from an acetyl donor, acetyl coenzyme A (AcCoA), to the amino group of UDP-4-amino-4,6-dideoxy-N-acetyl-beta-l-altrosamine to produce UDP-2,4-diacetamido-2,4,6-trideoxy-beta-l-altropyranose. To elucidate the catalytic mechanism of cjPseH, crystal structures of cjPseH alone and in complex with AcCoA were determined at 1.95 A resolution. cjPseH folds into a single-domain structure of a central beta-sheet decorated by four alpha-helices with two continuously connected grooves. A deep groove (groove-A) accommodates the AcCoA molecule. Interestingly, the acetyl end of AcCoA points toward an open space in a neighboring shallow groove (groove-S), which is occupied by extra electron density that potentially serves as a pseudosubstrate, suggesting that the groove-S may provide a substrate-binding site. Structure-based comparative analysis suggests that cjPseH utilizes a unique catalytic mechanism of acetylation that has not been observed in other glycosylation-associated acetyltransferases. Thus, our studies on cjPseH will provide valuable information for the design of new antibiotics to treat C. jejuni-induced gastroenteritis. Structural analysis of PseH, the Campylobacter jejuni N-acetyltransferase involved in bacterial O-linked glycosylation.,Song WS, Nam MS, Namgung B, Yoon SI Biochem Biophys Res Commun. 2015 Mar 20;458(4):843-8. doi:, 10.1016/j.bbrc.2015.02.041. Epub 2015 Feb 16. PMID:25698400 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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