粗糙脉孢菌中氨基酸摄取活性的发展。

Development of amino acid uptake activity in Neurospora.

作者信息

Railey R M, Kinsey J A

出版信息

Can J Microbiol. 1976 Feb;22(2):115-20. doi: 10.1139/m76-017.

Abstract

During the germination and growth of Neurospora conidia, amino acid permease systems I (neutral) and II (general) increase in specific activity. System III (basic) decreases in specific activity with the onset of germination. System I shows two peaks of activity during the logarithmic phase of growth. One peak occurs at 6 h, the other at 12 h of growth. Both peaks are abolished in the mtr mutant. Both peaks have a Km for phenylalanine of 40 muM. The peaks of system I activity appear to correlate with morphological changes.

摘要

在粗糙脉孢菌分生孢子的萌发和生长过程中，氨基酸通透酶系统I（中性）和系统II（通用）的比活性增加。系统III（碱性）的比活性在萌发开始时降低。系统I在生长对数期显示出两个活性峰值。一个峰值出现在生长6小时时，另一个出现在生长12小时时。在mtr突变体中，这两个峰值均消失。这两个峰值对苯丙氨酸的Km值均为40μM。系统I活性的峰值似乎与形态变化相关。