EC |
4.3.2.7 |
Accepted name: |
glutathione-specific γ-glutamylcyclotransferase |
Reaction: |
glutathione = L-cysteinylglycine + 5-oxo-L-proline |
Other name(s): |
γ-GCG; CHAC (gene name); CHAC1 (gene name); CHAC2 (gene name) |
Systematic name: |
glutathione γ-glutamyl cyclotransferase (5-oxo-L-proline producing) |
Comments: |
The enzyme, found in bacteria, fungi and animals, is specific for glutathione (cf. EC 4.3.2.9, γ-glutamylcyclotransferase). The enzyme acts as a cyclotransferase, cleaving the amide bond via transamidation using the α-amine of the L-glutamyl residue, releasing it as the cyclic 5-oxo-L-proline. |
Links to other databases: |
BRENDA, EXPASY, Gene, KEGG, MetaCyc, PDB |
References: |
1. |
Kumar, A., Tikoo, S., Maity, S., Sengupta, S., Sengupta, S., Kaur, A. and Bachhawat, A.K. Mammalian proapoptotic factor ChaC1 and its homologues function as γ-glutamyl cyclotransferases acting specifically on glutathione. EMBO Rep. 13 (2012) 1095–1101. [DOI] [PMID: 23070364] |
2. |
Kaur, A., Gautam, R., Srivastava, R., Chandel, A., Kumar, A., Karthikeyan, S. and Bachhawat, A.K. ChaC2, an enzyme for slow turnover of cytosolic glutathione. J. Biol. Chem. 292 (2017) 638–651. [DOI] [PMID: 27913623] |
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[EC 4.3.2.7 created 2017] |
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