Sialic acid lyase in differentiating murine teratocarcinoma cells.

Sialic acid lyase in differentiating murine teratocarcinoma cells.
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唾液酸裂解酶在分化小鼠畸胎癌细胞中的作用。

DOI:
10.1016/0014-4827(85)90088-6
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发表时间:
1985
影响因子:
3.7
通讯作者:
Warren,L
Warren,L
中科院分区:
医学3区
文献类型:
--
作者:
Warren,L

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已发现培养的分化的鼠壁内胚层细胞(PYS-2)中的N-乙酰神经氨酸裂解酶(NAN-裂解酶)活性比相关的未分化的胚胎畸胎瘤细胞(F9)中的活性高得多。在暴露于分化诱导剂如视黄酸(RA)(10− 7 M)的F9细胞中,该酶的水平迅速增加。该酶的水平在PYS-2细胞生长的对数期期间增加,并且在细胞达到汇合后降低。来自PYS-2细胞的NAN-裂解酶已纯化365倍,并已部分表征。虽然大多数酶是自由可溶的,但PYS-2细胞中至少16%的酶与细胞核相关。鉴于NAN、神经氨酸酶、NAN转移酶和合成和激活NAN的酶的水平在分化过程中基本保持不变的事实,讨论了NAN裂解酶在细胞中的可能功能及其在生长和分化过程中显著升高的意义。
N-Acetylneuraminic acid lyase (NAN-lyase) activity has been found to be much higher in the differentiated, murine parietal endodermal ceil (PYS-2) in culture than in the related, undifferentiated embryonal teratocarcinoma cell (F9). The level of the enzyme rapidly increases in F9 cells exposed to an inducer of differentiation such as retinoic acid (RA) (10−7M). The level of the enzyme increases during log phase of growth of PYS-2 cells and decreases after the cells reach confluence. NAN-lyase from PYS-2 cells has been purified 365-fold and has been partially characterized. While most of the enzyme is freely soluble, at least 16% of the enzyme in PYS-2 cells is associated with the nucleus. The possible function of NAN-lyase in the cell and the significance of its marked elevation during growth and differentiation are discussed in view of the fact that the levels of NAN, neuraminidase, NAN transferases and the enzymes that synthesize and activate NAN, remain essentially unchanged during differentiation.
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发表时间: 1967
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DOI: 10.1146/annurev.bi.53.070184.003313
发表时间: 1984
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发表时间: 1970
期刊: The Journal of biological chemistry
影响因子: --
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