1b5s

DIHYDROLIPOYL TRANSACETYLASE (E.C.2.3.1.12) CATALYTIC DOMAIN (RESIDUES 184-425) FROM BACILLUS STEAROTHERMOPHILUS

spinqualitylabelsall models 1b5s, resolution 4.40Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1b5s is a 5 chain structure with sequence from Geobacillus stearothermophilus. The September 2012 RCSB PDB Molecule of the Month feature on Pyruvate Dehydrogenase Complex by David Goodsell is 10.2210/rcsb_pdb/mom_2012_9. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 4.4Å Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function ODP2_GEOSE The pyruvate dehydrogenase complex catalyzes the overall conversion of pyruvate to acetyl-CoA and CO(2). It contains multiple copies of three enzymatic components: pyruvate dehydrogenase (E1), dihydrolipoamide acetyltransferase (E2) and lipoamide dehydrogenase (E3). 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 The pyruvate dehydrogenase multienzyme complex (Mr of 5-10 million) is assembled around a structural core formed of multiple copies of dihydrolipoyl acetyltransferase (E2p), which exhibits the shape of either a cube or a dodecahedron, depending on the source. The crystal structures of the 60-meric dihydrolipoyl acyltransferase cores of Bacillus stearothermophilus and Enterococcus faecalis pyruvate dehydrogenase complexes were determined and revealed a remarkably hollow dodecahedron with an outer diameter of approximately 237 A, 12 large openings of approximately 52 A diameter across the fivefold axes, and an inner cavity with a diameter of approximately 118 A. Comparison of cubic and dodecahedral E2p assemblies shows that combining the principles of quasi-equivalence formulated by Caspar and Klug [Caspar, D. L. & Klug, A. (1962) Cold Spring Harbor Symp. Quant. Biol. 27, 1-4] with strict Euclidean geometric considerations results in predictions of the major features of the E2p dodecahedron matching the observed features almost exactly. Principles of quasi-equivalence and Euclidean geometry govern the assembly of cubic and dodecahedral cores of pyruvate dehydrogenase complexes.,Izard T, Aevarsson A, Allen MD, Westphal AH, Perham RN, de Kok A, Hol WG Proc Natl Acad Sci U S A. 1999 Feb 16;96(4):1240-5. PMID:9990008 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Dihydrolipoamide acetyltransferase 3D structures

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