4-Hydroxyphenylpyruvate dioxygenase

4-hydroxyphenylpyruvate dioxygenase
Homodimer of 4-Hydroxyphenylpyruvate dioxygenase. Red ribbon represents iron-containing catalytic domain (with Fe 2+ represented as red-orange spheres); blue represents the oligomeric domain. Image generated from published structural data [1]
Identifiers
EC no.1.13.11.27
CAS no.9029-72-5
Databases
IntEnzIntEnz view
BRENDABRENDA entry
ExPASyNiceZyme view
KEGGKEGG entry
MetaCycmetabolic pathway
PRIAMprofile
PDB structuresRCSB PDB PDBe PDBsum
Gene OntologyAmiGO / QuickGO
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NCBIproteins
4-hydroxyphenylpyruvate dioxygenase
Identifiers
SymbolHPPD
Alt. symbolsHPD; PPD
NCBI gene3242
HGNC5147
OMIM609695
RefSeqNM_002150
UniProtP32754
Other data
EC number1.13.11.27
LocusChr. 12 q24-qter
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StructuresSwiss-model
DomainsInterPro

4-Hydroxyphenylpyruvate dioxygenase (HPPD), also known as α-ketoisocaproate dioxygenase (KIC dioxygenase), is an Fe(II)-containing non-heme oxygenase that catalyzes the second reaction in the catabolism of tyrosine - the conversion of 4-hydroxyphenylpyruvate into homogentisate. HPPD also catalyzes the conversion of phenylpyruvate to 2-hydroxyphenylacetate and the conversion of α-ketoisocaproate to β-hydroxy β-methylbutyrate.[2][3] HPPD is an enzyme that is found in nearly all aerobic forms of life.[4]

This reaction shows the conversion of 4-hydroxyphenylpyruvate into homogentisate by HPPD.
  1. ^ Fritze IM, Linden L, Freigang J, Auerbach G, Huber R, Steinbacher S (Apr 2004). "The crystal structures of Zea mays and Arabidopsis 4-hydroxyphenylpyruvate dioxygenase". Plant Physiology. 134 (4): 1388–400. doi:10.1104/pp.103.034082. PMC 419816. PMID 15084729.; rendered with UCSF Chimera [1]
  2. ^ "Homo sapiens: 4-hydroxyphenylpyruvate dioxygenase reaction". MetaCyc. SRI International. 20 August 2012. Retrieved 6 June 2016.
  3. ^ Kohlmeier M (2015). "Leucine". Nutrient Metabolism: Structures, Functions, and Genes (2nd ed.). Academic Press. pp. 385–388. ISBN 9780123877840. Retrieved 6 June 2016.
  4. ^ Gunsior M, Ravel J, Challis GL, Townsend CA (Jan 2004). "Engineering p-hydroxyphenylpyruvate dioxygenase to a p-hydroxymandelate synthase and evidence for the proposed benzene oxide intermediate in homogentisate formation". Biochemistry. 43 (3): 663–74. doi:10.1021/bi035762w. PMID 14730970.