Qu'est-ce (qui) est pyridoxal - définition
CHEMICAL COMPOUND
Pyridoxal hydrochloride
pyridoxal
[?p?r?'d?ks?l]
¦ noun Biochemistry an oxidized derivative of pyridoxine which acts as a coenzyme in some metabolic processes, including the degradation of amino acids.
Group II pyridoxal-dependent decarboxylases
CLASS OF ENZYMES
In molecular biology, group II pyridoxal-dependent decarboxylases are family of enzymes including aromatic-L-amino-acid decarboxylase (L-dopa decarboxylase or tryptophan decarboxylase) , which catalyses the decarboxylation of tryptophan to tryptamine, tyrosine decarboxylase , which converts tyrosine into tyramine and histidine decarboxylase , which catalyses the decarboxylation of histidine to histamine.
Group I pyridoxal-dependent decarboxylases
CLASS OF ENZYMES
In molecular biology, the group I pyridoxal-dependent decarboxylases, also known as glycine cleavage system P-proteins, are a family of enzymes consisting of glycine cleavage system P-proteins (glycine dehydrogenase (decarboxylating)) from bacterial, mammalian and plant sources. The P protein is part of the glycine decarboxylase multienzyme complex (GDC) also annotated as glycine cleavage system or glycine synthase.
Wikipédia
Pyridoxal
Pyridoxal is one form of vitamin B6.
Some medically relevant bacteria, such as those in the genera Granulicatella and Abiotrophia, require pyridoxal for growth. This nutritional requirement can lead to the culture phenomenon of satellite growth. In in vitro culture, these pyridoxal-dependent bacteria may only grow in areas surrounding colonies of bacteria from other genera ("satellitism") that are capable of producing pyridoxal.
Pyridoxal is involved in what is believed to be the most ancient reaction of aerobic metabolism on Earth, about 2.9 billion years ago, a forerunner of the Great Oxidation Event.
