Crystal structure of tyrosine hydroxylase at 2.3 Å and its implications for inherited neurodegenerative diseases

Kenneth E. Goodwill, Christelle Sabatier, Cara Marks, Reetta Raag, Paul F. Fitzpatrick, Raymond C. Stevens

Research output: Contribution to journalArticlepeer-review

254 Scopus citations

Abstract

Tyrosine hydroxylase (TyrOH) catalyzes the conversion of tyrosine to L- DOPA, the rate-limiting step in the biosynthesis of the catecholamines dopamine, adrenaline, and noradrenaline. TyrOH is highly homologous in terms of both protein sequence and catalytic mechanism to phenylalanine hydroxylase (PheOH) and tryptophan hydroxylase (TrpOH). The crystal structure of the catalytic and tetramerization domains of TyrOH reveals a novel α-helical basket holding the catalytic iron and a 40 Å long anti-parallel coiled coil which forms the core of the tetramer. The catalytic iron is located 10 Å below the enzyme surface in a 17 Å deep active site pocket and is coordinated by the conserved residues His 331. His 336 and Glu 376. The structure provides a rationale for the effect of point mutations in TyrOH that cause L-DOPA responsive parkinsonism and Segawa's syndrome. The location of 112 different point mutations in PheOH that lead to phenylketonuria (PKU) are predicted based on the TyrOH structure.

Original languageEnglish (US)
Pages (from-to)578-585
Number of pages8
JournalNature Structural Biology
Volume4
Issue number7
DOIs
StatePublished - Jul 17 1997

ASJC Scopus subject areas

  • Structural Biology
  • Biochemistry
  • Genetics

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