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3dyd, resolution 2.30Å ()
Gene: TAT (Homo sapiens)
Activity: Tyrosine transaminase, with EC number
Resources: FirstGlance, OCA, RCSB, PDBsum
Coordinates: save as pdb, mmCIF, xml


Human Tyrosine Aminotransferase


[ATTY_HUMAN] Defects in TAT are the cause of tyrosinemia type 2 (TYRO2) [MIM:276600]; also known as Richner-Hanhart syndrome. TYRO2 is an inborn error of metabolism characterized by elevations of tyrosine in the blood and urine, and oculocutaneous manifestations. Typical features include palmoplantar keratosis, painful corneal ulcers, and mental retardation.[1]


[ATTY_HUMAN] Transaminase involved in tyrosine breakdown. Converts tyrosine to p-hydroxyphenylpyruvate. Can catalyze the reverse reaction, using glutamic acid, with 2-oxoglutarate as cosubstrate (in vitro). Has much lower affinity and transaminase activity towards phenylalanine.[2][3]

About this Structure

3dyd is a 2 chain structure with sequence from Homo sapiens. Full crystallographic information is available from OCA.


  1. Natt E, Kida K, Odievre M, Di Rocco M, Scherer G. Point mutations in the tyrosine aminotransferase gene in tyrosinemia type II. Proc Natl Acad Sci U S A. 1992 Oct 1;89(19):9297-301. PMID:1357662
  2. Seralini GE, Luu-The V, Labrie F. Cloning and expression of human tyrosine aminotransferase cDNA. Biochim Biophys Acta. 1995 Jan 2;1260(1):97-101. PMID:7999802
  3. Sivaraman S, Kirsch JF. The narrow substrate specificity of human tyrosine aminotransferase--the enzyme deficient in tyrosinemia type II. FEBS J. 2006 May;273(9):1920-9. PMID:16640556 doi:10.1111/j.1742-4658.2006.05202.x

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