Prephenate dehydrogenase is an enzyme found in the shikimate pathway, and helps catalyze the reaction from prephenate to tyrosine.
| prephenate dehydrogenase | |||||||||
|---|---|---|---|---|---|---|---|---|---|
 Prephenate dehydrogenase homodimer, Bacillus anthracis | |||||||||
| Identifiers | |||||||||
| EC no. | 1.3.1.12 | ||||||||
| CAS no. | 9044-92-2 | ||||||||
| Databases | |||||||||
| IntEnz | IntEnz view | ||||||||
| BRENDA | BRENDA entry | ||||||||
| ExPASy | NiceZyme view | ||||||||
| KEGG | KEGG entry | ||||||||
| MetaCyc | metabolic pathway | ||||||||
| PRIAM | profile | ||||||||
| PDB structures | RCSB PDB PDBe PDBsum | ||||||||
| Gene Ontology | AmiGO / QuickGO | ||||||||
| |||||||||
Nomenclature
editGene: (Saccharomyces Cerevisiae) TYR1[1]
Shikimate pathway: Arogenate/Prephenate (ADH/PDH). Although in the shikimate pathway arogenate and prephenate dehydrogenase catalyze different reactions, they can at times be used interchangeably.[2]
This enzyme so far has been found in sixteen different organisms; twelve different kinds of bacteria (mostly cyanobacteria) and four different kinds of plants (mostly different kinds of beans).[8]
Bacteria organisms (examples): Acenitobacter calcoaceticus, Fischerella sp., Flavobacterium so., Comamonas testosteroni, and nostoc sp.
Plant organisms: phaseolus coccineus, phaseolus vulgaris, vicia faba, vigna radiata
Function
editPresent in the shikimate pathway, in the pathway to synthesize tyrosine (a non-essential amino acid in both plants and animals). It catalyzes the oxidative decarboxylation reaction of prephenate to 4-hydroxyphenylpyruvate.[9]
Reaction
edit
In enzymology, a prephenate dehydrogenase (EC 1.3.1.12) is an enzyme that catalyzes the chemical reaction
- prephenate + NAD+ 4-hydroxyphenylpyruvate + CO2 + NADH
Thus, the two substrates of this enzyme are prephenate and NAD+, whereas its 3 products are 4-hydroxyphenylpyruvate, CO2, and NADH.
Structure
editThis enzyme belongs to the family of oxidoreductases, specifically those acting on the CH-CH group of donor with NAD+ or NADP+ as acceptor. The systematic name of this enzyme class is prephenate:NAD+ oxidoreductase (decarboxylating). Other names in common use include hydroxyphenylpyruvate synthase, and chorismate mutase---prephenate dehydrogenase. This enzyme participates in phenylalanine, tyrosine and tryptophan biosynthesis and novobiocin biosynthesis.
Also found in haemophilus influenzae, synechocystis (bacteria), and aquifex aeolicus (plant).
However, in haemophilus influenzae, prephenate dehydrogenase is fused with the enzyme chorismate mutase. This fusion is not found in plants or animals.[10]
Structural studies
editAs of late 2007, two structures have been solved for this class of enzymes, with PDB accession codes 2G5C and 2PV7.
References
edit- ^ Mannhaupt G, Stucka R, Pilz U, Schwarzlose C, Feldmann H (1989). "Characterization of the Prephenate Dehydrogenase-encoding Gene, TYR1, from Saccharomyces Cerevisiae". Gene. 85 (2): 303–11. doi:10.1016/0378-1119(89)90422-8. PMID 2697638.
- ^ "EC 1.3.1.13." EC 1.3.1.13. IUBMB Enzyme Nomenclature, 1972. Web. 24 Apr. 2014.
- ^ "Prephenate Dehydrogenase - TyrA - Bacillus Subtilis (strain 168)."Prephenate Dehydrogenase - TyrA - Bacillus Subtilis (strain 168). UniProt, 13 Nov. 2013. Web. 24 Apr. 2014.
- ^ "EC 1.3.1.13." EC 1.3.1.13. IUBMB Enzyme Nomenclature, 1972. Web. 24 Apr. 2014.
- ^ "EC 1.3.1.13." EC 1.3.1.13. IUBMB Enzyme Nomenclature, 1972. Web. 24 Apr. 2014.
- ^ "EC 1.3.1.13." EC 1.3.1.13. IUBMB Enzyme Nomenclature, 1972. Web. 24 Apr. 2014.
- ^ "EC 1.3.1.13." EC 1.3.1.13. IUBMB Enzyme Nomenclature, 1972. Web. 24 Apr. 2014.
- ^ "EC 1.3.1.13 - Prephenate Dehydrogenase (NADP+)." Information on Prephenate Dehydrogenase. BRENDA, n.d. Web. 24 Apr. 2014.
- ^ "InterPro." Bifunctional Chorismate Mutase/prephenate Dehydrogenase T-protein (IPR008244). InterPro, n.d. Web. 24 Apr. 2014.
- ^ Chiu HJ, Abdubek P, Astakhova T, Axelrod HL, Carlton D, Clayton T, Das D, Deller MC, Duan L, Feuerhelm J, Grant JC, Grzechnik A, Han GW, Jaroszewski L, Jin KK, Klock HE, Knuth MW, Kozbial P, Krishna SS, Kumar A, Marciano D, McMullan D, Miller MD, Morse AT, Nigoghossian E, Okach L, Reyes R, Tien HJ, Trame CB, van den Bedem H, Weekes D, Xu Q, Hodgson KO, Wooley J, Elsliger MA, Deacon AM, Godzik A, Lesley SA, Wilson IA (Oct 2010). "The Structure of Haemophilus Influenzae Prephenate Dehydrogenase Suggests Unique Features of Bifunctional TyrA Enzymes". Acta Crystallogr F. 66 (Pt 10): 1317–25. doi:10.1107/S1744309110021688. PMC 2954222. PMID 20944228.
