Enzymes
| UniProtKB help_outline | 15,014 proteins |
| Enzyme class help_outline |
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Reaction participants Show >> << Hide
- Name help_outline an L-aminoacyl-L-amino acid Identifier CHEBI:77460 Charge 0 Formula C4H6N2O3R2 SMILEShelp_outline [NH3+][C@@H]([*])C(=O)N[C@@H]([*])C([O-])=O 2D coordinates Mol file for the small molecule Search links Involved in 5 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline H2O Identifier CHEBI:15377 (Beilstein: 3587155; CAS: 7732-18-5) help_outline Charge 0 Formula H2O InChIKeyhelp_outline XLYOFNOQVPJJNP-UHFFFAOYSA-N SMILEShelp_outline [H]O[H] 2D coordinates Mol file for the small molecule Search links Involved in 6,204 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline an L-α-amino acid Identifier CHEBI:59869 Charge 0 Formula C2H4NO2R SMILEShelp_outline [NH3+][C@@H]([*])C([O-])=O 2D coordinates Mol file for the small molecule Search links Involved in 366 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
Cross-references
| RHEA:48940 | RHEA:48941 | RHEA:48942 | RHEA:48943 | |
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| Reaction direction help_outline | undefined | left-to-right | right-to-left | bidirectional |
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Related reactions help_outline
Specific form(s) of this reaction
Publications
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Characterization of a Bifidobacterium longum BORI dipeptidase belonging to the U34 family.
Seo J.M., Ji G.E., Cho S.H., Park M.S., Lee H.J.
A dipeptidase was purified from a cell extract of Bifidobacterium longum BORI by ammonium sulfate precipitation and chromatography on DEAE-cellulose and Q-Sepharose columns. The purified dipeptidase had a molecular mass of about 49 kDa and was optimally active at pH 8.0 and 50 degrees C. The enzym ... >> More
A dipeptidase was purified from a cell extract of Bifidobacterium longum BORI by ammonium sulfate precipitation and chromatography on DEAE-cellulose and Q-Sepharose columns. The purified dipeptidase had a molecular mass of about 49 kDa and was optimally active at pH 8.0 and 50 degrees C. The enzyme was a strict dipeptidase, being capable of hydrolyzing a range of dipeptides but not tri- and tetrapeptides, p-nitroanilide derivatives of amino acids, or N- or C-terminus-blocked dipeptides. A search of the amino acid sequence of an internal tryptic fragment against protein sequences deduced from the total genome sequence of B. longum NCC2705 revealed that it was identical to an internal sequence of the dipeptidase gene (pepD), which comprised 1,602 nucleotides encoding 533 amino acids with a molecular mass of 60 kDa, and thereby differed considerably from the 49-kDa mass of the purified dipeptidase. To understand this discrepancy, pepD was cloned into an Escherichia coli expression vector (pBAD-TOPO derivative) to generate the recombinant plasmids pBAD-pepD and pBAD-pepD-His (note that His in the plasmid designation stands for a polyhistidine coding region). Both plasmids were successfully expressed in E. coli, and the recombinant protein PepD-His was purified using nickel-chelating affinity chromatography and reconfirmed by internal amino acid sequencing. The PepD sequence was highly homologous to those of the U34 family of peptidases, suggesting that the B. longum BORI dipeptidase is a type of cysteine-type N-terminal nucleophile hydrolase and has a beta-hairpin motif similar to that of penicillin V acylase, which is activated by autoproteolytic processing. << Less
Appl. Environ. Microbiol. 73:5598-5606(2007) [PubMed] [EuropePMC]