| Entry |
|
| Name |
phenylalanine/tyrosine ammonia-lyase;
PTAL;
bifunctional PAL
|
| Class |
Lyases;
Carbon-nitrogen lyases;
Ammonia-lyases
 |
| Sysname |
L-phenylalanine(or L-tyrosine):trans-cinnamate(or trans-p-hydroxycinnamate) ammonia-lyase
|
| Reaction(IUBMB) |
(1) L-phenylalanine = trans-cinnamate + NH3 [RN: R00697];
(2) L-tyrosine = trans-p-hydroxycinnamate + NH3 [RN: R00737]
|
| Reaction(KEGG) |
|
| Substrate |
|
| Product |
|
| Comment |
This enzyme is a member of the aromatic amino acid lyase family, other members of which are EC 4.3.1.3 (histidine ammonia-lyase), EC 4.3.1.23 (tyrosine ammonia-lyase) and EC 4.3.1.24 (phenylalanine ammonia-lyase). The enzyme from some monocots, including maize, and from the yeast Rhodosporidium toruloides, deaminate L-phenylalanine and L-tyrosine with similar catalytic efficiency [3]. The enzyme contains the cofactor 3,5-dihydro-5-methylidene-4H-imidazol-4-one (MIO), which is common to this family [3]. This unique cofactor is formed autocatalytically by cyclization and dehydration of the three amino-acid residues alanine, serine and glycine [4].
|
| History |
EC 4.3.1.25 created 2008 (EC 4.3.1.5 created 1965, part-incorporated 2008)
|
| Pathway |
| Phenylalanine metabolism | | Phenylpropanoid biosynthesis | | Metabolic pathways | | Biosynthesis of secondary metabolites |
|
| Orthology |
| phenylalanine/tyrosine ammonia-lyase |
|
| Genes |
OSA: | | DOSA: | | BDI: | | SBI: | | ZMA: | | SITA: | |
 |
| Reference |
|
| Authors |
Rosler J, Krekel F, Amrhein N, Schmid J. |
| Title |
Maize phenylalanine ammonia-lyase has tyrosine ammonia-lyase activity. |
| Journal |
Plant. Physiol. 113 (1997) 175-9. |
| Sequence |
|
| Reference |
|
| Authors |
Watts KT, Mijts BN, Lee PC, Manning AJ, Schmidt-Dannert C. |
| Title |
Discovery of a substrate selectivity switch in tyrosine ammonia-lyase, a member of the aromatic amino acid lyase family. |
| Journal |
Chem. Biol. 13 (2006) 1317-26. |
| Reference |
|
| Authors |
Louie GV, Bowman ME, Moffitt MC, Baiga TJ, Moore BS, Noel JP. |
| Title |
Structural determinants and modulation of substrate specificity in phenylalanine-tyrosine ammonia-lyases. |
| Journal |
Chem. Biol. 13 (2006) 1327-38. |
| Reference |
|
| Authors |
Schwede TF, Retey J, Schulz GE. |
| Title |
Crystal structure of histidine ammonia-lyase revealing a novel polypeptide modification as the catalytic electrophile. |
| Journal |
Biochemistry. 38 (1999) 5355-61. |
| Other DBs |
ExplorEnz - The Enzyme Database: IUBMB Enzyme Nomenclature: ExPASy - ENZYME nomenclature database: BRENDA, the Enzyme Database: |
| LinkDB |
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