Enzymes
UniProtKB help_outline | 5 proteins |
Enzyme class help_outline |
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Reaction participants Show >> << Hide
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Namehelp_outline
L-leucyl-tRNALeu
Identifier
RHEA-COMP:9622
Reactive part
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- Name help_outline 3'-(L-leucyl)adenylyl group Identifier CHEBI:78494 Charge 0 Formula C16H24N6O7P SMILEShelp_outline CC(C)C[C@H]([NH3+])C(=O)O[C@@H]1[C@@H](COP([O-])(-*)=O)O[C@H]([C@@H]1O)n1cnc2c(N)ncnc12 2D coordinates Mol file for the small molecule Search links Involved in 7 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline cyclo(L-leucyl-L-leucyl) Identifier CHEBI:67269 (CAS: 952-45-4) help_outline Charge 0 Formula C12H22N2O2 InChIKeyhelp_outline XWYXUMDVQIOAPR-UWVGGRQHSA-N SMILEShelp_outline CC(C)C[C@@H]1NC(=O)[C@H](CC(C)C)NC1=O 2D coordinates Mol file for the small molecule Search links Involved in 2 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline H+ Identifier CHEBI:15378 Charge 1 Formula H InChIKeyhelp_outline GPRLSGONYQIRFK-UHFFFAOYSA-N SMILEShelp_outline [H+] 2D coordinates Mol file for the small molecule Search links Involved in 9,176 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
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Namehelp_outline
tRNALeu
Identifier
RHEA-COMP:9613
Reactive part
help_outline
- Name help_outline AMP 3'-end residue Identifier CHEBI:78442 Charge -1 Formula C10H12N5O6P SMILEShelp_outline Nc1ncnc2n(cnc12)[C@@H]1O[C@H](COP([O-])(-*)=O)[C@@H](O)[C@H]1O 2D coordinates Mol file for the small molecule Search links Involved in 67 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
Cross-references
RHEA:46452 | RHEA:46453 | RHEA:46454 | RHEA:46455 | |
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Reaction direction help_outline | undefined | left-to-right | right-to-left | bidirectional |
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Publications
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Cyclodipeptide synthases arec a family of tRNA-dependent peptide bond-forming enzymes.
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., Pernodet J.L.
Cyclodipeptides and their derivatives belong to the diketopiperazine (DKP) family, which is comprised of a broad array of natural products that exhibit useful biological properties. In the few known DKP biosynthetic pathways, nonribosomal peptide synthetases (NRPSs) are involved in the synthesis o ... >> More
Cyclodipeptides and their derivatives belong to the diketopiperazine (DKP) family, which is comprised of a broad array of natural products that exhibit useful biological properties. In the few known DKP biosynthetic pathways, nonribosomal peptide synthetases (NRPSs) are involved in the synthesis of cyclodipeptides that constitute the DKP scaffold, except in the albonoursin (1) pathway. Albonoursin, or cyclo(alpha,beta-dehydroPhe-alpha,beta-dehydroLeu), is an antibacterial DKP produced by Streptomyces noursei. In this pathway, the formation of the cyclo(Phe-Leu) (2) intermediate is catalyzed by AlbC, a small protein unrelated to NRPSs. We demonstrated that AlbC uses aminoacyl-tRNAs as substrates to catalyze the formation of the DKP peptide bonds. Moreover, several other bacterial proteins, presenting moderate similarity to AlbC, also use aminoacyl-tRNAs to synthesize various cyclodipeptides. Therefore, AlbC and these related proteins belong to a newly defined family of enzymes that we have named cyclodipeptide synthases (CDPSs). << Less
Nat. Chem. Biol. 5:414-420(2009) [PubMed] [EuropePMC]
This publication is cited by 2 other entries.
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Structural basis for nonribosomal peptide synthesis by an aminoacyl-tRNA synthetase paralog.
Bonnefond L., Arai T., Sakaguchi Y., Suzuki T., Ishitani R., Nureki O.
Cyclodipeptides are secondary metabolites biosynthesized by many bacteria and exhibit a wide array of biological activities. Recently, a new class of small proteins, named cyclodipeptide synthases (CDPS), which are unrelated to the typical nonribosomal peptide synthetases, was shown to generate se ... >> More
Cyclodipeptides are secondary metabolites biosynthesized by many bacteria and exhibit a wide array of biological activities. Recently, a new class of small proteins, named cyclodipeptide synthases (CDPS), which are unrelated to the typical nonribosomal peptide synthetases, was shown to generate several cyclodipeptides, using aminoacyl-tRNAs as substrates. The Mycobacterium tuberculosis CDPS, Rv2275, was found to generate cyclodityrosine through the formation of an aminoacyl-enzyme intermediate and to have a structure and oligomeric state similar to those of the class Ic aminoacyl-tRNA synthetases (aaRSs). However, the poor sequence conservation among CDPSs has raised questions about the architecture and catalytic mechanism of the identified homologs. Here we report the crystal structures of Bacillus licheniformis CDPS YvmC-Blic, in the apo form and complexed with substrate mimics, at 1.7-2.4-Å resolutions. The YvmC-Blic structure also exhibits similarity to the class Ic aaRSs catalytic domain. Our mutational analysis confirmed the importance of a set of residues for cyclodileucine formation among the conserved residues localized in the catalytic pocket. Our biochemical data indicated that YvmC-Blic binds tRNA and generates cyclodileucine as a monomer. We were also able to detect the presence of an aminoacyl-enzyme reaction intermediate, but not a dipeptide tRNA intermediate, whose existence was postulated for Rv2275. Instead, our results support a sequential catalytic mechanism for YvmC-Blic, with the successive attachment of two leucine residues on the enzyme via a conserved serine residue. Altogether, our findings suggest that all CDPS enzymes share a common aaRS-like architecture and a catalytic mechanism involving the formation of an enzyme-bound intermediate. << Less
Proc. Natl. Acad. Sci. U.S.A. 108:3912-3917(2011) [PubMed] [EuropePMC]