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| Chorismate mutase | |||||||||
|---|---|---|---|---|---|---|---|---|---|
 Crystal structure of chorismate mutase with a transition state analogue bound | |||||||||
| Identifiers | |||||||||
| EC no. | 5.4.99.5 | ||||||||
| CAS no. | 9068-30-8 | ||||||||
| 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 | ||||||||
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In enzymology, chorismate mutase (EC 5.4.99.5) is an enzyme that catalyzes the chemical reaction for the conversion of chorismate to prephenate in the pathway to the production of phenylalanine and tyrosine, also known as the shikimate pathway. Hence, this enzyme has one substrate, chorismate, and one product, prephenate. Chorismate mutase is found at a branch point in the pathway. The enzyme channels the substrate, chorismate to the biosynthesis of tyrosine and phenylalanine and away from tryptophan.[1] Its role in maintaining the balance of these aromatic amino acids in the cell is vital.[2] This is the single known example of a naturally occurring enzyme catalyzing a pericyclic reaction.[2][nb 1] Chorismate mutase is only found in fungi, bacteria, and higher plants. Some varieties of this protein may use the morpheein model of allosteric regulation.[4]
- ^ Qamra R, Prakash P, Aruna B, Hasnain SE, Mande SC (June 2006). "The 2.15 A crystal structure of Mycobacterium tuberculosis chorismate mutase reveals an unexpected gene duplication and suggests a role in host-pathogen interactions". Biochemistry. 45 (23): 6997–7005. doi:10.1021/bi0606445. PMID 16752890.
- ^ a b Kast P, Grisostomi C, Chen IA, Li S, Krengel U, Xue Y, Hilvert D (November 2000). "A strategically positioned cation is crucial for efficient catalysis by chorismate mutase". The Journal of Biological Chemistry. 275 (47): 36832–8. doi:10.1074/jbc.M006351200. PMID 10960481.
- ^ Luk LY, Qian Q, Tanner ME (August 2011). "A cope rearrangement in the reaction catalyzed by dimethylallyltryptophan synthase?". Journal of the American Chemical Society. 133 (32): 12342–5. doi:10.1021/ja2034969. PMID 21766851.
- ^ Selwood T, Jaffe EK (March 2012). "Dynamic dissociating homo-oligomers and the control of protein function". Archives of Biochemistry and Biophysics. 519 (2): 131–43. doi:10.1016/j.abb.2011.11.020. PMC 3298769. PMID 22182754.
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