منابع مشابه
2-Deoxy-α-d-arabino-hexopyranose
The title compound, C(6)H(12)O(5), is the α-pyran-ose form of the reducing aldose 2-de-oxy-d-arabino-hexose. The six-membered pyran-ose ring adopts a (4)C(1) conformation, with the anomeric hy-droxy group in axial and the other substituents in equatorial positions. In the crystal, each of the four hy-droxy groups acts as an inter-molecular hydrogen-bond donor function, resulting in a three-dime...
متن کامل3-Deoxy-D-arabino-heptulosonate 7-Phosphate Synthase
The phenylalanine-sensitive 3-deoxy-marabino-heptulosonate ?-phosphate synthase (7-phospho-2-keto-3deoxy-D-arabino-heptonate D-erythrose-4-phosphate lyase (pyruvate phosphorylating), EC 4.2.1.15) was purified to apparent homogeneity from extracts of Escherichia coli K12. The enzyme has a molecular weight of 140,000 as judged by gel filtration and sedimentation equilibrium analysis. The enzyme h...
متن کاملFacile synthesis of nitrophenyl 2-acetamido-2-deoxy-α-D-mannopyranosides from ManNAc-oxazoline
The synthetic procedures for a large-scale preparation of o- and p-nitrophenyl 2-acetamido-2-deoxy-α-D-mannopyranoside are described. The synthetic pathway employs the glycosylation of phenol with ManNAc oxazoline, followed by nitration of the aromatic moiety yielding a separable mixture of the o- and p-nitrophenyl derivative in a 2:3 ratio.
متن کاملA Combined Chemical - En zymatrc Synthesis of 3 - Deoxy - D - arabino - heptulosonic Acid 7 - Phosphate I
3-Deoxy-o-arabino-heptulosonic acid 7-phosphate (DAHP) has been synthesized from N-acetyl-n/l-aspartate p-semialdehyde and dihydroxyacetone phosphate in four steps with an overall yield of 13%. The key step generates the required threo stereochemistry by using rabbit muscle aldolase (E.C.4.1.2.13) as catalysl. 3-Deoxy-o-arabino-heptulosonic a id 7-phosphate (DAHP, l) is an important intermediat...
متن کاملAllostery of 3-deoxy-D-arabino-heptulosonate 7-phosphate synthetase in Clostridium: another conserved generic characteristic.
Enzymological studies were done to characterize the allosteric control of 3-deoxy-d-arabino-heptulosonate 7-phosphate (DAHP) synthetase in three species of Clostridium. Allosteric control was identified as feedback inhibition by phenylalanine and was qualitatively similar for the DAHP synthetases of C. butyricum, C. acetobutylicum, and C. tetanomorphum. Quantitative differences in the enzymolog...
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ژورنال
عنوان ژورنال: Acta Crystallographica Section E Structure Reports Online
سال: 2011
ISSN: 1600-5368
DOI: 10.1107/s1600536811035264