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2
Changes in enzymic activities of nucleoside diphosphate sugar interconversions during differentiation of cambium to xylem in sycamore and poplar.悬铃木和杨树形成层向木质部分化过程中核苷二磷酸糖相互转化的酶活性变化。
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2
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7
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8
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1
WOOD HEMICELLULOSES. I.木材半纤维素。一
Adv Carbohydr Chem. 1964;19:247-302.
2
Structural chemistry of the hemicelluloses.半纤维素的结构化学
Adv Carbohydr Chem. 1959;14:429-68. doi: 10.1016/s0096-5332(08)60228-3.
3
The enzymatic synthesis of a glucomannan.葡甘露聚糖的酶促合成
Biochem Biophys Res Commun. 1966 May 3;23(3):311-8. doi: 10.1016/0006-291x(66)90547-x.
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Changes in the cell walls of plants during differentiation.植物细胞壁在分化过程中的变化。
Symp Soc Exp Biol. 1963;17:157-74.
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Patterns of polysaccharide biosynthesis in differentiating cells of maize root-tips.玉米根尖分化细胞中多糖生物合成的模式。
Biochem J. 1970 Dec;120(3):479-91. doi: 10.1042/bj1200479.
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Biosynthesis of uridine diphosphate D-xylose. V. UDP-D-glucuronate and UDP-D-galacturonate carboxy-lyase of Ampullariella digitata.尿苷二磷酸 D-木糖的生物合成。V. 指状瓶霉的尿苷二磷酸-D-葡萄糖醛酸和尿苷二磷酸-D-半乳糖醛酸羧基裂解酶
Arch Biochem Biophys. 1972 Feb;148(2):576-80. doi: 10.1016/0003-9861(72)90176-2.
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Biosynthesis of a cell wall glucomannan in mung bean seedlings.绿豆幼苗中细胞壁葡甘露聚糖的生物合成。
J Biol Chem. 1969 Mar 25;244(6):1608-16.
8
UDPGlucose 4-epimerase from Saccharomyces fragilis. Allosteric kinetics with UDP-glucose as substrate.来自脆壁酵母的UDP葡萄糖4-表异构酶。以UDP-葡萄糖为底物的变构动力学。
J Biol Chem. 1975 Jun 10;250(11):4373-5.
9
Changes in enzymic activities of nucleoside diphosphate sugar interconversions during differentiation of cambium to xylem in sycamore and poplar.悬铃木和杨树形成层向木质部分化过程中核苷二磷酸糖相互转化的酶活性变化。
Biochem J. 1977 Feb 15;162(2):267-79. doi: 10.1042/bj1620267.

松和冷杉形成层分化为木质部过程中核苷二磷酸糖相互转化的酶活性变化

Changes in enzymic activities of nucleoside diphosphate sugar interconversions during differentiation of cambium to xylem in pine and fir.

作者信息

Dalessandro G, Northcote D H

出版信息

Biochem J. 1977 Feb 15;162(2):281-8. doi: 10.1042/bj1620281.

DOI:10.1042/bj1620281
PMID:192219
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC1164599/
Abstract

A protein fraction [precipitate obtained between 40 and 65% (NH4)2SO4 satn.] prepared from cambial cells, differentiating xylem cells and differentiated xylem cells of pine and fir trees contained all the enzymes required for the nucleoside diphosphate sugar interconversions. By using UDP-D-[U-14C]glucose or UDP-D-[U-14C]galactose, UDP-D-[U-14C-]glucuronic acid and UDP-D-[U-14C]xylose as substrates, the activities of UDP-D-galactose 4-epimerase (DC 5.1.3.2), UDP-D-xylose 4-epimerase(EC 5.1.3.5), UDP-D-glucose dehydrogenase (EC 1.1.1.22) and UDP-D-glucuronate 4-epimerase (EC5.1.3.6), UDP-d-glucuronate decarboxylase (EC 4.1.1.35) were measured at different stages of cell-wall development. The specific activities and the activities per cell of these enzymes varied during differentiation of cambium to xylem according to the type polysaccharide synthesized. Variations were also found between the two species investigated. These data, compared with those obtained in out previous work on angiosperms [see the preceding paper, Dalessandro & Northcote (1977) Biochem. J. 162, 267-279], suggest that some control of polysaccharide synthesis operates at the level of the formation of the precursors of pectin and hemicellulose syntheses.

摘要

从松树和冷杉树的形成层细胞、正在分化的木质部细胞以及已分化的木质部细胞中制备的一种蛋白质组分（在40%至65%饱和度的硫酸铵中获得的沉淀）含有核苷二磷酸糖相互转化所需的所有酶。以UDP-D-[U-¹⁴C]葡萄糖、UDP-D-[U-¹⁴C]半乳糖、UDP-D-[U-¹⁴C-]葡萄糖醛酸和UDP-D-[U-¹⁴C]木糖为底物，在细胞壁发育的不同阶段测定了UDP-D-半乳糖4-表异构酶（DC 5.1.3.2）、UDP-D-木糖4-表异构酶（EC 5.1.3.5）、UDP-D-葡萄糖脱氢酶（EC 1.1.1.22）、UDP-D-葡萄糖醛酸4-表异构酶（EC5.1.3.6）和UDP-D-葡萄糖醛酸脱羧酶（EC 4.1.1.35）的活性。这些酶的比活性和每个细胞的活性在形成层向木质部分化过程中，根据合成的多糖类型而有所不同。在所研究的两个物种之间也发现了差异。这些数据与我们之前关于被子植物的研究结果[见前文，Dalessandro & Northcote（1977）Biochem. J. 162, 267 - 279]相比，表明在果胶和半纤维素合成前体的形成水平上存在对多糖合成的某种控制。