首页> 外文期刊>Journal of Molecular Biology >The crystal structure of dTDP-D-glucose 4,6-dehydratase (RmlB) fromSalmonella enterica serovar typhimurium, the second enzyme in thedTDP-L-rhamnose pathway
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The crystal structure of dTDP-D-glucose 4,6-dehydratase (RmlB) fromSalmonella enterica serovar typhimurium, the second enzyme in thedTDP-L-rhamnose pathway

机译:肠沙门氏菌血清鼠伤寒沙门氏菌dDDP-D-葡萄糖4,6-脱水酶(RmlB)的晶体结构,dTDP-L-鼠李糖途径中的第二种酶

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摘要

(L)-Rhamnose is a 6-deoxyhexose that is found in a variety of different glycoconjugates in the cell walls of pathogenic bacteria. The precursor of L-rhamnose is dTDP-(L)-rhamnose, which is synthesised from glucose-1-phosphate and deoxythymidine triphosphate (dTTP) via a pathway requiring four enzymes. Significantly this pathway does not exist in humans and all four enzymes therefore represent potential therapeutic targets, dTDP-(D)-glucose 4,6-dehydratase (Rm1B; EC 4.2.1.46) is the second enzyme in the dTDP-(L)-rhamnose biosynthetic pathway. The structure of Salmonella enterica serovar Typhimurium Rm1B had been determined to 2.47 Angstrom resolution with its cofactor NAD (+) bound. The structure has been refined to a crystallographic X-factor of 20.4% and an X-free value of 24.9 % with good stereochemistry.
机译:(L)-鼠李糖是6-脱氧己糖,其在病原菌细胞壁的多种不同糖缀合物中发现。 L-鼠李糖的前体是dTDP-(L)-鼠李糖,它是由葡萄糖-1-磷酸和脱氧胸苷三磷酸(dTTP)通过需要四种酶的途径合成的。显然,该途径在人类中不存在,因此所有四种酶均代表潜在的治疗靶标,dTDP-(D)-葡萄糖4,6-脱水酶(Rm1B; EC 4.2.1.46)是dTDP-(L)-中的第二种酶。鼠李糖生物合成途径。沙门氏菌血清型鼠伤寒沙门氏菌Rm1B的结构已确定为2.47埃分辨率,并带有辅因子NAD(+)。该结构已精炼到20.4%的晶体X因子和24.9%的无X值,并具有良好的立体化学。

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