The Enzyme Database

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Accepted name: cyclo(L-tyrosyl-L-tyrosyl) synthase
Reaction: 2 L-tyrosyl-tRNATyr = 2 tRNATyr + cyclo(L-tyrosyl-L-tyrosyl)
For diagram of cyclic dipeptide biosynthesis, click here
Glossary: cyclo(L-tyrosyl-L-tyrosyl) = (3S,6S)-3,6-bis[(4-hydroxyphenyl)methyl]piperazine-2,5-dione
Other name(s): Rv2275 (gene name); cYY synthase; cyclodityrosine synthase
Systematic name: L-tyrosyl-tRNATyr:L-tyrosyl-tRNATyr tyrosyltransferase (cyclizing)
Comments: The reaction proceeds following a ping-pong mechanism forming a covalent intermediate between an active site serine and the first L-tyrosine residue [2]. The protein, from the bacterium Mycobacterium tuberculosis, also forms small amounts of cyclo(L-tyrosyl-L-phenylalanyl) [1].
Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc
1.  Gondry, M., Sauguet, L., Belin, P., Thai, R., Amouroux, R., Tellier, C., Tuphile, K., Jacquet, M., Braud, S., Courcon, M., Masson, C., Dubois, S., Lautru, S., Lecoq, A., Hashimoto, S., Genet, R. and Pernodet, J.L. Cyclodipeptide synthases are a family of tRNA-dependent peptide bond-forming enzymes. Nat. Chem. Biol. 5 (2009) 414–420. [PMID: 19430487]
2.  Vetting, M.W., Hegde, S.S. and Blanchard, J.S. The structure and mechanism of the Mycobacterium tuberculosis cyclodityrosine synthetase. Nat. Chem. Biol. 6 (2010) 797–799. [PMID: 20852636]
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