Acetylglutamate synthase from Neurospora crassa: Structure and regulation of expression

作者：Yu YG; Turner GE; Weiss RL

来源：Molecular Microbiology, 1996, 22(3): 545-554.

DOI：10.1046/j.1365-2958.1996.1321494.x

A DNA clone which complemented an arg-14 mutation of Neurospora crassa was isolated by sib selection from a cosmid library (pMOcosX). Southern and restriction-fragment-length polymorphism (RFLP) analysis confirmed that the cloned DNA contained the arg-14 gene. The arg-14 gene was identified as the structural gene for acetylglutamate synthase by immunodepletion of enzyme activity with antibodies prepared against an arg-14 fusion protein and by the thermal instability of acetylglutamate synthase in a temperature-sensitive arg-14 mutant. The fungal acetylglutamate synthase has little sequence homology to its bacterial counterpart, unlike other arginine biosynthetic enzymes. Expression of the arg-14 gene is regulated by cross-pathway control similar to many amino acid biosynthetic genes. However, expression of acetylglutamate synthase occurs throughout the developmental growth cycle, unlike other arginine biosynthetic enzymes.

• 出版日期1996-11