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A branched-chain amino acid (BCAA) is an amino acid having an aliphatic side-chain with a branch (a central carbon atom bound to three or more carbon atoms). Among the proteinogenic amino acids, there are three BCAAs: leucine, isoleucine, and valine. [1]
This enzyme catalyzes the reversible transamination of branched-chain alpha-keto acids (BCKAs) to the branched-chain amino acids (BCAAs) valine, leucine and isoleucine, which are essential for cell growth. In humans, its primary role is the deamination of BCAAs, as humans lack the enzymes for de novo synthesis of BCKAs.
Branched-chain amino acids (BCAA) are ubiquitous in many organisms, comprising 35% of all proteins and 40% of the amino acids required in all mammals. [13] Mammalian BCATs come in two isoforms: cytosolic (BCATc) and mitochondrial (BCATm). The isoforms share 58% homology, [15] but vary in location and catalytic efficiency.
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BCAA may refer to: Branched-chain amino acid; Belgian Civil Aviation Authority; Bermuda Civil Aviation Authority; British Columbia Automobile Association
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