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Nitrogen Source Regulates Glutamate Dehydrogenase NADP Synthesis in Neurospora crassa

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TLDR
Quantitative immunoelectrophoresis established that, under all conditions, enzyme activity corresponded to enzyme concentration, and isotope incorporation studies demonstrated that the nitrogen source exerts its regulation at the level of de novo enzyme synthesis.
Abstract
Neurospora crassa glutamate dehydrogenase-NADP (EC 1.3.1.3) has a higher activity when mycelium is grown on ammonium or nitrate as nitrogen source than when grown on glutamate or glutamine. Quantitative immunoelectrophoresis established that, under all conditions, enzyme activity corresponded to enzyme concentration. Isotope incorporation studies demonstrated that the nitrogen source exerts its regulation at the level of de novo enzyme synthesis.

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Morphological, biochemical and molecular changes during ectomycorrhiza development

TL;DR: Recent genetic data indicate that the continued vegetative growth of the ectomycorrhizal hyphae and the root tissues, and their ability to switch to symbiotic organ formation, is basically controlled by developmentally critical genes.
Journal ArticleDOI

Ammonium assimilation by spruce—Hebeloma sp. ectomycorrhizas

TL;DR: Results are consistent with a major role of glutamate dehydrogenase and glutamine synthetase in nitrogen assimilation in the symbiosis and do not suggest any significant role for glutamate synthase in the synthesis of glutamate.
Journal ArticleDOI

Nitrogen assimilating enzymes in the white button mushroom Agaricus bisporus

TL;DR: The specific activities of the ammonia assimilating enzymes showed no variation during maturation of the sporophores and A. bisporus was not able to use organic nitrogen containing substances as a sole nitrogen and carbon source.
Journal ArticleDOI

The involvement of glutamate dehydrogenase and glutamine synthetase in ammonia assimilation by the rapidly growing ectomycorrhizal ascomycete, Cenococcum geophilum Fr.

TL;DR: The data are consistent with a pivotal role for glutamine synthetase activity and indicates that the primary assimilation of NH4+ in rapidly growing C. geophilum is brought about by concurrent activity of the GDH and GS pathways.
Journal ArticleDOI

Glutamine metabolism and cycling in Neurospora crassa.

TL;DR: The glutamine cycle is not futile, because it is necessary to drive an effective carbon flow to support growth and, in doing so, buffers variations in the nutrient supply and drives energy generation and carbon flow for optimal cell function.
References
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Journal ArticleDOI

Cleavage of Structural Proteins during the Assembly of the Head of Bacteriophage T4

TL;DR: Using an improved method of gel electrophoresis, many hitherto unknown proteins have been found in bacteriophage T4 and some of these have been identified with specific gene products.
Journal Article

Cleavage of structural proteins during the assemble of the head of bacterio-phage T4

U. K. Laemmli
- 01 Jan 1970 - 
TL;DR: Using an improved method of gel electrophoresis, many hitherto unknown proteins have been found in bacteriophage T4 and some of these have been identified with specific gene products as mentioned in this paper.
Journal ArticleDOI

A Film Detection Method for Tritium‐Labelled Proteins and Nucleic Acids in Polyacrylamide Gels

TL;DR: A simple method for detecting 3H in polyacrylamide gels by scintillation autography (fluorography) using X-ray film, which is ten times more sensitive than conventional autoradiography of isotopes with higher emission energies.
Journal ArticleDOI

The occurrence of two different glutamic dehydrogenases in Neurospora.

TL;DR: Many wild-type strains of Neurospora crassa produce two glutamic dehydrogenases, one specific for triphosphopyridine nucleotide and another for diphosphopyrsine nucleotide, which may be reasons for the presence of two different enzymes catalyzing the same reaction.
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