Enzymes
| UniProtKB help_outline | 33,523 proteins |
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- Name help_outline 1-(5-phospho-β-D-ribosyl)-ATP Identifier CHEBI:73183 Charge -6 Formula C15H19N5O20P4 InChIKeyhelp_outline RKNHJBVBFHDXGR-KEOHHSTQSA-H SMILEShelp_outline O[C@H]1[C@@H](O)[C@@H](O[C@@H]1COP([O-])(=O)OP([O-])(=O)OP([O-])([O-])=O)n1cnc2c1ncn([C@@H]1O[C@H](COP([O-])([O-])=O)[C@@H](O)[C@H]1O)c2=N 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 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 1-(5-phospho-β-D-ribosyl)-5'-AMP Identifier CHEBI:59457 Charge -4 Formula C15H19N5O14P2 InChIKeyhelp_outline RTQMRTSPTLIIHM-KEOHHSTQSA-J SMILEShelp_outline O[C@H]1[C@@H](O)[C@@H](O[C@@H]1COP([O-])([O-])=O)n1cnc2c1ncn([C@@H]1O[C@H](COP([O-])([O-])=O)[C@@H](O)[C@H]1O)c2=N 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 diphosphate Identifier CHEBI:33019 (Beilstein: 185088) help_outline Charge -3 Formula HO7P2 InChIKeyhelp_outline XPPKVPWEQAFLFU-UHFFFAOYSA-K SMILEShelp_outline OP([O-])(=O)OP([O-])([O-])=O 2D coordinates Mol file for the small molecule Search links Involved in 1,129 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 9,431 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
Cross-references
| RHEA:22828 | RHEA:22829 | RHEA:22830 | RHEA:22831 | |
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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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The 1.25 A resolution structure of phosphoribosyl-ATP pyrophosphohydrolase from Mycobacterium tuberculosis.
Javid-Majd F., Yang D., Ioerger T.R., Sacchettini J.C.
Phosphoribosyl-ATP pyrophosphohydrolase is the second enzyme in the histidine-biosynthetic pathway, irreversibly hydrolyzing phosphoribosyl-ATP to phosphoribosyl-AMP and pyrophosphate. It is encoded by the hisE gene, which is present as a separate gene in many bacteria and archaea but is fused to ... >> More
Phosphoribosyl-ATP pyrophosphohydrolase is the second enzyme in the histidine-biosynthetic pathway, irreversibly hydrolyzing phosphoribosyl-ATP to phosphoribosyl-AMP and pyrophosphate. It is encoded by the hisE gene, which is present as a separate gene in many bacteria and archaea but is fused to hisI in other bacteria, fungi and plants. Because of its essentiality for growth in vitro, HisE is a potential drug target for tuberculosis. The crystal structures of two native (uncomplexed) forms of HisE from Mycobacterium tuberculosis have been determined to resolutions of 1.25 and 1.79 A. The structure of the apoenzyme reveals that the protein is composed of five alpha-helices with connecting loops and is a member of the alpha-helical nucleoside-triphosphate pyrophosphatase superfamily. The biological unit of the protein is a homodimer, with an active site on each subunit composed of residues exclusively from that subunit. A comparison with the Campylobacter jejuni dUTPase active site allowed the identification of putative metal- and substrate-binding sites in HisE, including four conserved glutamate and glutamine residues in the sequence that are consistent with a motif for pyrophosphohydrolase activity. However, significant differences between family members are observed in the loop region between alpha-helices H1 and H3. The crystal structure of M. tuberculosis HisE provides insights into possible mechanisms of substrate binding and the diversity of the nucleoside-triphosphate pyrophosphatase superfamily. << Less
Acta Crystallogr D Biol Crystallogr 64:627-635(2008) [PubMed] [EuropePMC]