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SULFOQUINOVOSIDASES CATALYZE HYDROLYSIS OF PLANT SULFOLIPID: COMPARATIVE STRUCTURAL AND KINETIC STUDIES

机译：磺丙酮苷酶催化植物硫普利普利的水解：比较结构和动力学研究

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Sulfoquinovose (SQ, 6-deoxy-6-sulfoglucose) is a sulfur-containing sugar that forms the polar head group of the plant sulfolipid, sulfoquinovosyl diacylglycerol (SQDG)[4]. Two sulfoglycolysis pathways have been discovered that facilitate the degradation of SQDG: the sulfoglycolyticEmbden-Meyerhof-Parnas (sulfo-EMP) pathway and the sulfoglycolytic Entner-Doudoroff (sulfo-ED) pathway[1,2]. Entry of SQDG to the sulfur cycle requires hydrolysis of SQDG to form SQ, which is catalyzed by a sulfoquinovosidase, YihQ. Structural analysis of Esherichia coli YihQ revealed substrate recognition by a non-contiguous QQRWY motif[3]. On the other hand putative SQases within gene clusters encoding sulfo-EMP and sulfo-ED pathways contain a KERWY motif; it is not known whether these genes encode genuine sulfoquinovosidases.

机译：磺喹啉（Sq，6-脱氧-6-磺葡聚糖）是含硫糖，其形成植物硫普利的极性头部，磺喹啉基二甘油（SQDG）[4]。已经发现两种磺基族解途径，促进SqdG的降解：磺基吡咯型肿瘤 - Meyerhof-parnas（磺基-MEP）途径和磺酰络合物Entner-doudoroff（磺酰ED）途径[1,2]。 SQDG进入硫循环需要SQDG的水解以形成Sq，以形成由磺基喹啉酶，yihq催化。 Esherichia Coli Yihq的结构分析显示非连续QQRWY基序的基板识别[3]。另一方面，在编码磺基-MEP和磺基型途径的基因簇中，含有Kerwy主题的诱导的Sqase;尚不清楚这些基因是否编码真正的磺丙酮苷酶。

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《International Carbohydrate Symposium》|2018年|832 p.|共1页
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Palika Abayakoon; Yi Jin; James P. Lingford;
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中图分类碳水化合物、糖;
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SULFOQUINOVOSIDASES CATALYZE HYDROLYSIS OF PLANT SULFOLIPID: COMPARATIVE STRUCTURAL AND KINETIC STUDIES

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