Enzymes
| UniProtKB help_outline | 1,120 proteins |
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Reaction participants Show >> << Hide
- Name help_outline formamide Identifier CHEBI:16397 (CAS: 75-12-7) help_outline Charge 0 Formula CH3NO InChIKeyhelp_outline ZHNUHDYFZUAESO-UHFFFAOYSA-N SMILEShelp_outline [H]C(N)=O 2D coordinates Mol file for the small molecule Search links Involved in 4 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline H2O Identifier CHEBI:15377 (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 6,264 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline formate Identifier CHEBI:15740 (CAS: 71-47-6) help_outline Charge -1 Formula CHO2 InChIKeyhelp_outline BDAGIHXWWSANSR-UHFFFAOYSA-M SMILEShelp_outline [H]C([O-])=O 2D coordinates Mol file for the small molecule Search links Involved in 98 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline NH4+ Identifier CHEBI:28938 (CAS: 14798-03-9) help_outline Charge 1 Formula H4N InChIKeyhelp_outline QGZKDVFQNNGYKY-UHFFFAOYSA-O SMILEShelp_outline [H][N+]([H])([H])[H] 2D coordinates Mol file for the small molecule Search links Involved in 529 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
Cross-references
| RHEA:21948 | RHEA:21949 | RHEA:21950 | RHEA:21951 | |
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| Reaction direction help_outline | undefined | left-to-right | right-to-left | bidirectional |
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More general form(s) of this reaction
Publications
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The AmiE aliphatic amidase and AmiF formamidase of Helicobacter pylori: natural evolution of two enzyme paralogues.
Skouloubris S., Labigne A., De Reuse H.
Aliphatic amidases (EC 3.5.1.4) are enzymes catalysing the hydrolysis of short-chain amides to produce ammonia and the corresponding organic acid. Such an amidase, AmiE, has been detected previously in Helicobacter pylori. Analysis of the complete H. pylori genome sequence revealed the existence o ... >> More
Aliphatic amidases (EC 3.5.1.4) are enzymes catalysing the hydrolysis of short-chain amides to produce ammonia and the corresponding organic acid. Such an amidase, AmiE, has been detected previously in Helicobacter pylori. Analysis of the complete H. pylori genome sequence revealed the existence of a duplicated amidase gene that we named amiF. The corresponding AmiF protein is 34% identical to its AmiE paralogue. Because gene duplication is widely considered to be a fundamental process in the acquisition of novel enzymatic functions, we decided to study and compare the functions of the paralogous amidases of H. pylori. AmiE and AmiF proteins were overproduced in Escherichia coli and purified by a two-step chromatographic procedure. The two H. pylori amidases could be distinguished by different biochemical characteristics such as optimum pH or temperature. AmiE hydrolysed propionamide, acetamide and acrylamide and had no activity with formamide. AmiF presented an unexpected substrate specificity: it only hydrolysed formamide. AmiF is thus the first formamidase (EC 3.5.1.49) related to aliphatic amidases to be described. Cys-165 in AmiE and Cys-166 in AmiF were identified as residues essential for catalysis of the corresponding enzymes. H. pylori strains carrying single and double mutations of amiE and amiF were constructed. The substrate specificities of these enzymes were confirmed in H. pylori. Production of AmiE and AmiF proteins is dependent on the activity of other enzymes involved in the nitrogen metabolism of H. pylori (urease and arginase respectively). Our results strongly suggest that (i) the H. pylori paralogous amidases have evolved to achieve enzymatic specialization after ancestral gene duplication; and (ii) the production of these enzymes is regulated to maintain intracellular nitrogen balance in H. pylori. << Less
Mol. Microbiol. 40:596-609(2001) [PubMed] [EuropePMC]
This publication is cited by 3 other entries.
Comments
Published in: "The aliphatic amidases of Pseudomonas aeruginosa." Clarke, P.H. Adv. Microb. Physiol. 4 (1970) 179–222. "Utilization of aliphatic amides and formation of two different amidases by Alcaligenes eutrophus." Friedich, C.G. and Mitrenga, G. J. Gen. Microbiol. 125 (1981) 367–374.