Suppr超能文献

γ-谷氨酰转移酶在小牛胸腺细胞中的亚细胞定位

Subcellular localization of gamma-glutamyltransferase in calf thymocytes.

作者信息

Suter D, Brunner G, Ferber E

出版信息

Biochem J. 1978 Nov 1;175(2):643-7. doi: 10.1042/bj1750643.

Abstract

The subcellular localization of gamma-glutamyltransferase in calf thymocytes was investigated and compared with that of alkaline phosphodiesterase I, alkaline nitrophenyl phosphatase, succinate-tetrazolium oxidoreductase (succinate-INT reductase) and lactate dehydrogenase after two different methods of cell disruption and differential centrifugation. Most of the activity was recovered in the crude membrane fractions (43.0%), but significant amounts co-pelleted with the large-granule (mitochondria) fractions (31%). The specific activity of the gamma-glutamyltransferase in the purified plasma membrane was 30-50 times that of the enzyme in the cell homogenate and had a similar subcellular distribution to the plasma-membrane markers, alkaline phosphodiesterase I and alkaline nitrophenyl phosphatase. It was concluded that gamma-glutamyltransferase was primary a plasma-membrane-bound enzyme, and that its location in other subcellular fractions was probably due to their contamination with plasma-membrane vesicles.

摘要

研究了小牛胸腺细胞中γ-谷氨酰转移酶的亚细胞定位,并在两种不同的细胞破碎和差速离心方法后,将其与碱性磷酸二酯酶I、碱性硝基苯磷酸酶、琥珀酸-四氮唑氧化还原酶(琥珀酸-INT还原酶)和乳酸脱氢酶的亚细胞定位进行了比较。大部分活性在粗膜级分中回收(43.0%),但有相当数量的活性与大颗粒(线粒体)级分共沉淀(31%)。纯化质膜中γ-谷氨酰转移酶的比活性是细胞匀浆中该酶的30至50倍,并且其亚细胞分布与质膜标记物碱性磷酸二酯酶I和碱性硝基苯磷酸酶相似。得出的结论是,γ-谷氨酰转移酶主要是一种与质膜结合的酶,其在其他亚细胞级分中的定位可能是由于它们被质膜囊泡污染所致。

相似文献

9
Subcellular localization of adenylate cyclase in thymocytes.腺苷酸环化酶在胸腺细胞中的亚细胞定位。
Biochim Biophys Acta. 1980 Apr 17;629(1):50-60. doi: 10.1016/0304-4165(80)90263-9.

本文引用的文献

5
Isolation and characterization of lymphocyte plasma membranes.淋巴细胞质膜的分离与鉴定
Biochim Biophys Acta. 1972 May 9;266(2):494-504. doi: 10.1016/0005-2736(72)90105-8.
6
Preparation and properties of lymphocyte plasma membrane.淋巴细胞质膜的制备与特性
Contemp Top Mol Immunol. 1974;3:27-56. doi: 10.1007/978-1-4684-2838-4_2.

文献AI研究员

20分钟写一篇综述,助力文献阅读效率提升50倍。

立即体验

用中文搜PubMed

大模型驱动的PubMed中文搜索引擎

马上搜索

文档翻译

学术文献翻译模型,支持多种主流文档格式。

立即体验