2b7l

Crystal Structure of CTP:Glycerol-3-Phosphate Cytidylyltransferase from Staphylococcus aureus

spinqualitylabelsall models 2b7l, resolution 3.00Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2b7l is a 4 chain structure with sequence from Staphylococcus aureus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 3Å Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function O05155_STAAU 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 Integrity of the cell wall is essential for bacterial survival, and as a consequence components involved in its biosynthesis can potentially be exploited as targets for antibiotics. One such potential target is CTP:glycerol-3-phosphate cytidylyltransferase. This enzyme (TarD(Sa) in Staphylococcus aureus and TagD(Bs) in Bacillus subtilis) catalyzes the formation of CDP-glycerol, which is used for the assembly of linkages between peptidoglycan and teichoic acid polymer in Gram-positive bacteria. Intriguingly, despite the high sequence identity between TarD(Sa) and TagD(Bs) (69% identity), kinetic studies show that these two enzymes differ markedly in their kinetic mechanism and activity. To examine the basis for the disparate enzymological properties, we have determined the crystal structure of TarD(Sa) in the apo state to 3 A resolution, and performed equilibrium sedimentation analysis. Comparison of the structure with that of CTP- and CDP-glycerol-bound TagD(Bs) crystal structures reveals that the overall structure of TarD(Sa) is essentially the same as that of TagD(Bs), except in the C-terminus, where it forms a helix in TagD(Bs) but is disordered in the apo TarD(Sa) structure. In addition, TarD(Sa) can exist both as a tetramer and as a dimer, unlike TagD(Bs), which is a dimer. These observations shed light on the structural basis for the differing kinetic characteristics between TarD(Sa) and TagD(Bs). Crystal structure of CTP:glycerol-3-phosphate cytidylyltransferase from Staphylococcus aureus: examination of structural basis for kinetic mechanism.,Fong DH, Yim VC, D'Elia MA, Brown ED, Berghuis AM Biochim Biophys Acta. 2006 Jan;1764(1):63-9. Epub 2005 Nov 10. PMID:16344011 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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