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CBS P35520

胱硫醚β-合酶 (EC 4.2.1.22) (Beta-thionase) (丝氨酸硫水化酶)

蛋白质信息 (UniProt)

胱硫醚β-合酶 (EC 4.2.1.22) (Beta-thionase) (丝氨酸硫水化酶)

P35520

功能描述

氢裂解酶,催化转硫途径的第一步,在该步骤中,L-丝氨酸的羟基在β-置换反应中被L-同型半胱氨酸置换,形成L-胱硫醚,即L-半胱氨酸的前体。该分解代谢途径允许消除L-甲硫氨酸和有毒代谢物L-同型半胱氨酸 (PubMed:20506325, PubMed:23974653, PubMed:23981774)。也参与硫化氢的产生,硫化氢是一种气体递质,对神经元具有信号传导和细胞保护作用 (By similarity)。 {ECO:0000250|UniProtKB:P32232, ECO:0000269|PubMed:20506325, ECO:0000269|PubMed:23974653, ECO:0000269|PubMed:23981774}。

组织特异性

In the adult strongly expressed in liver and pancreas, some expression in heart and brain, weak expression in lung and kidney. In the fetus, expressed in brain, liver and kidney.

亚细胞定位

Cytoplasm

关键词

3D-structure Allosteric enzyme Alternative splicing Amino-acid biosynthesis CBS domain Cysteine biosynthesis Cytoplasm Disease variant Heme Iron