1od6

The Crystal Structure of Phosphopantetheine adenylyltransferase from Thermus Thermophilus in complex with 4'-phosphopantetheine

spinqualitylabelsall models 1od6, resolution 1.50Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1od6 is a 1 chain structure with sequence from Thermus thermophilus HB8. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.5Å Ligands: PNS, SO4 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT, TOPSAN Function COAD_THET8 Reversibly transfers an adenylyl group from ATP to 4'-phosphopantetheine, yielding dephospho-CoA (dPCoA) and pyrophosphate.[HAMAP-Rule:MF_00151] 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 Phosphopantetheine adenylyltransferase (PPAT) is an essential enzyme in bacteria that catalyzes the rate-limiting step in coenzyme A (CoA) biosynthesis by transferring an adenylyl group from ATP to 4'-phosphopantetheine (Ppant), yielding 3'-dephospho-CoA (dPCoA). The crystal structure of PPAT from Thermus thermophilus HB8 (Tt PPAT) complexed with Ppant has been determined by the molecular-replacement method at 1.5 A resolution. The overall fold of the enzyme is almost the same as that of Escherichia coli PPAT, a hexamer having point group 32. The asymmetric unit of Tt PPAT contains a monomer and the crystallographic triad and dyad coincide with the threefold and twofold axes of the hexamer, respectively. Most of the important atoms surrounding the active site in E. coli PPAT are conserved in Tt PPAT, indicating similarities in their substrate binding and enzymatic reaction. The notable difference between E. coli PPAT and Tt PPAT is the simultaneous substrate recognition by all six subunits of Tt PPAT compared with substrate recognition by only three subunits in E. coli PPAT. Comparative analysis also revealed that the higher stability of Tt PPAT arises from stabilization of each subunit by hydrophobic effects, hydrogen bonds and entropic effects. Structure and implications for the thermal stability of phosphopantetheine adenylyltransferase from Thermus thermophilus.,Takahashi H, Inagaki E, Fujimoto Y, Kuroishi C, Nodake Y, Nakamura Y, Arisaka F, Yutani K, Kuramitsu S, Yokoyama S, Yamamoto M, Miyano M, Tahirov TH Acta Crystallogr D Biol Crystallogr. 2004 Jan;60(Pt 1):97-104. Epub 2003, Dec 18. PMID:14684898 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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