Question

Which amino acid plays a role in nitrogen metabolism?

Answer 1

Hint: Nitrogen metabolism is an integral aspect of the global chemical cycle as well as one of the basic processes of plant physiology. Through the reduction of nitrate, plant nitrogen absorption plays a direct role in the synthesis and conversion of amino acids. Nitrogen metabolism is not only one of basic processes of plant physiology, but also one of the important parts of the global chemical cycle.

Complete answer:
Ammonia is the preferred nitrogen donor in many microorganisms. Glutamate and glutamine are the primary products of absorbed ammonia, and they serve as the major nitrogen store for several metabolic pathways. Glutamate is the primary nitrogen source for the formation of N-amine and is engaged in the core of amino acid metabolism's transamination processes.

The availability of energy and nitrogen, for example, determines the participation of the three key enzymes in ammonia assimilation in E. coli: Glutamate synthetase (GS-ase), glutamate synthase (GOGAT-ase), and glutamate dehydrogenase (GDH-ase) are three enzymes that help to break down glutamine (Fig. 2). At the cost of one ATP molecule, GS-ase catalyses the integration of ammonia into glutamate to create glutamine.

The action of GOGAT-ase can then convert glutamine plus -ketoglutarate to glutamate. At low ammonia concentrations, this is the main route. In energy-strapped situations, glutamate can also be produced directly by -ketoglutarate amination, which is catalysed by GDH-ase.

Note:-
The principal end-product of nitrogen metabolism is urea. Gluconeogenesis is carried out using the carbon skeletons of amino acids. The liver produces urea, which is carried to the kidneys and expelled in the urine. Nitrogen fixation is a biological process that converts nitrogen gas into a form that plants and other microorganisms can use.