What is polyamine metabolism?
Polyamine metabolism has been linked to protein synthesis through the unique posttranslational modification of the universal translation factor EIF5A. EIF5A is an essential gene that encodes a protein that is approximately 17 kDa in size and is conserved among eukaryotes and archaebacteria .
What is the function of polyamine?
Polyamines can enhance the permeability of the blood–brain barrier. They are involved in modulating senescence of organs in plants and are therefore considered as a plant hormone. In addition, they are directly involved in regulation of programmed cell death.
What is polyamine growth factor?
The synthetically derived polyamine growth factor is a replication of the molecule found in all living things. As we age, smaller amounts of the naturally-occurring molecule are produced which, in turn, negatively affects cellular growth, skin elasticity and collagen production.
Where are polyamines found?
Polyamines are ubiquitous in eukaryotic and prokaryotic cells (Liu et al., 2016, 2017), and are found even in plant RNA viruses and plant tumors. They have potent biological activities. There are numerous forms of PAs. In higher plants, PAs are predominantly present in their free form.
What is the difference between polyamide and polyamine?
Note the Difference: Polyamide cured epoxies provide better flexibility, better abrasion resistance, improved corrosion resistance, and are relatively safer to use whereas polyamine-cured epoxies are tough, more chemical resistant, brittle, and provide improved abrasion resistance.
How is polyamine made?
Polyamines are synthesized from two amino acids: L-methionine and L-ornithine (an amino acid that is not found in proteins, that is produced as part of the urea cycle). In mammalian cells, putrescine is formed by decarboxylation of ornithine, a reaction catalyzed by the enzyme ornithine decarboxylase (ODC).
What are polyamines in bacteria?
The most common polyamines are putrescine, spermidine and spermine, which exist in varying concentrations in different organisms. They are involved in a variety of cellular processes such as gene expression, cell growth, survival, stress response and proliferation.
Is nylon a polyamine?
Nylon is a generic designation for a family of synthetic polymers composed of polyamides (repeating units linked by amide links). Nylon was the first commercially successful synthetic thermoplastic polymer.
What is amine epoxy?
An amine cured epoxy coating is an epoxy coating where an anime-based hardener was used in the curation process. In the most general sense, these epoxy coatings are described on the molecular level as having anime and alcohol functional groups formed during the curing.
Is polyamine an amino acid?
Polyamines are synthesized from two amino acids: L-methionine and L-ornithine (an amino acid that is not found in proteins, that is produced as part of the urea cycle). Polyamines are oxidized by variety of oxidases with different modes of action and co-factor requirements.
How is Cadaverine produced?
Cadaverine is synthesized through the direct decarboxylation of L-lysine, which is catalyzed by lysine decarboxylase in living cells.
What is polyamine metabolism and why is it important?
A factor that has been demonstrated to be involved in these responses is polyamine metabolism, essentially of the three most common polyamines: putrescine, spermidine and spermine. The gathered evidences on this subject suggest that polyamines are able to control cellular signal transduction, as well as to modulate protein-protein interactions.
Are polyamines involved in stress response in plants?
Among the known elements related with stress response are polyamines, as it has been widely demonstrated in plants ( Galston and Sawhney, 1990; Alcazar et al., 2010; Gill and Tuteja, 2010a; Gupta et al., 2013 ).
Is polyamine distribution different in prokaryotic and eukaryotic cells?
Regarding polyamine distribution, in general, eukaryotes have low putrescine content and a high content of spermidine and spermine, while prokaryotes have a higher concentration of putrescine than spermidine ( Manni et al., 1987 ).