beta-L-Arabinose 1-phosphate
IUPAC 名称
{[(2R,3R,4S,5S)-3,4,5-trihydroxyoxan-2-yl]oxy}phosphonic acid
描述
Beta-L-arabinose 1-phosphate is an intermediate in UDP-L-arabinose biosynthesis II (from L-arabinose) pathway. Although little is known of the incorporation of arabinose into these polymers or the contribution of the arabinosyl-substituents to the functions of the polymers, it has been demonstrated that arabinose-containing polymers are derived from UDP-L-arabinose, the activated sugar used by arabinosyltransferases.
The formation of UDP-L-arabinose occurs via two routes: a) a salvage pathway leading to the formation of UDP-L-arabinose from free arabinose (this pathway), and b) a de novo synthesis route involving the epimerisation of UDP-D-xylose by a UDP-D-xylose 4-epimerase The formation of UDP-L-arabinose at the end of the salvage pathway is achieved by a UDP-L-arabinose pyrophosphorylase. An enzyme with such activity has been purified from pea sprouts. This enzyme (USP for 'UDP-sugar pyrophosphorylase') was shown to have a broad range of monosaccharide substrates [HMDB]
异构
O[C@H]1CO[C@H](OP(O)(O)=O)[C@H](O)[C@H]1O
InChI标识符
InChI=1S/C5H11O8P/c6-2-1-12-5(4(8)3(2)7)13-14(9,10)11/h2-8H,1H2,(H2,9,10,11)/t2-,3-,4+,5+/m0/s1
键
ILXHFXFPPZGENN-QMKXCQHVSA-N