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|Molar mass||180.157 g/mol|
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Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
4-Hydroxyphenylpyruvic acid (4-HPPA) is an intermediate in the metabolism of the amino acid phenylalanine. The aromatic side chain of phenylalanine is hydroxylated by the enzyme phenylalanine hydroxylase to form tyrosine. The conversion from tyrosine to 4-HPPA is in turn catalyzed by tyrosine aminotransferase. Additionally, 4-HPPA can be converted to homogentisic acid which is one of the precursors to ochronotic pigment.
It is an intermediary compound in the biosynthesis of scytonemin.
- Brand, Larry; Harper, Alfred (1974). "Effect of glucagon on phenylalanine metabolism and phenylalanine-degrading enzymes in the rat". Biochemical Journal 142 (2): 231–45. PMC 1168273. PMID 4155291.
- Denoya, Claudio; Skinner, Deborah; Morgenstern, Margaret (September 1994). "A Streptomyces avermitilis gene encoding a 4-hydroxyphenylpyruvic acid dioxygenase-like protein that directs the production of homogentisic acid and an ochronotic pigment in Escherichia coli". Journal of Bacteriology 1 (17): 5312–5319. Retrieved 18 July 2011.
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