Enzymes
| UniProtKB help_outline | 2 proteins |
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- 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 Nω-methyl-L-arginine Identifier CHEBI:114953 Charge 1 Formula C7H17N4O2 InChIKeyhelp_outline NTNWOCRCBQPEKQ-YFKPBYRVSA-O SMILEShelp_outline CNC(=[NH2+])NCCC[C@H]([NH3+])C([O-])=O 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 L-citrulline Identifier CHEBI:57743 Charge 0 Formula C6H13N3O3 InChIKeyhelp_outline RHGKLRLOHDJJDR-BYPYZUCNSA-N SMILEShelp_outline NC(=O)NCCC[C@H]([NH3+])C([O-])=O 2D coordinates Mol file for the small molecule Search links Involved in 17 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline methylamine Identifier CHEBI:59338 Charge 1 Formula CH6N InChIKeyhelp_outline BAVYZALUXZFZLV-UHFFFAOYSA-O SMILEShelp_outline C[NH3+] 2D coordinates Mol file for the small molecule Search links Involved in 27 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
Cross-references
| RHEA:25173 | RHEA:25174 | RHEA:25175 | RHEA:25176 | |
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| Reaction direction help_outline | undefined | left-to-right | right-to-left | bidirectional |
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| EC numbers help_outline |
Publications
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Characterization of dimethylargininase from bovine brain: evidence for a zinc binding site.
Bogumil R., Knipp M., Fundel S.M., Vasak M.
Dimethylargininase (EC 3.5.3.18) is involved in the regulation of the levels of the natural occurring free arginine derivatives L-Nomega,Nomega-dimethylarginine and L-Nomega-methylarginine, which are reversible inhibitors of nitric oxide synthase. A dimethylargininase has been isolated from bovine ... >> More
Dimethylargininase (EC 3.5.3.18) is involved in the regulation of the levels of the natural occurring free arginine derivatives L-Nomega,Nomega-dimethylarginine and L-Nomega-methylarginine, which are reversible inhibitors of nitric oxide synthase. A dimethylargininase has been isolated from bovine brain tissue and was characterized by using immunological, kinetic, and spectroscopic techniques. Western blot analysis using polyclonal antibodies revealed that the enzyme is widely distributed in bovine with the highest relative concentrations found in brain and kidney tissue. A similar tissue distribution has also been reported for the other so far isolated dimethylargininase from rat kidney [Ogawa, T., Kimoto, M., and Sasaoka, K. (1989) J. Biol. Chem. 264, 10205-10209]. The bovine enzyme is a monomeric, globular protein (molecular mass approximately 31.2 kDa) containing one tightly bound Zn2+ ion, which can be removed by dialysis against 1,10-phenanthroline. The determination of kinetic constants for both the native (holo-protein) and the zinc-depleted (apo-protein) enzyme at 37 degrees ¿C established that the dimethylargininase is not a zinc hydrolase. The specific activity was 0.66 unit/mg for the holo-protein and 0.19 unit/mg for the apo-protein. The secondary structure determination of the native enzyme by circular dichroism revealed 41% alpha-helix and 32% beta-sheet and beta-turn structure. In the apo-enzyme, a small, but significant decrease in the alpha-helical content (5%) was observed, consistent with a marked decrease in enzymatic activity to 30%. Upon preincubation of both enzyme forms at 50 degrees C, only the holo-enzyme showed a residual enzymatic activity. In thermostability studies, a 7 degrees C lower apparent Tm value was observed for the apo-enzyme compared to the 66 degrees C for the holo-enzyme, suggesting that the zinc ion has a structure-stabilizing role. Besides the tightly bound zinc, additional Zn2+ ions inhibit the enzyme competitively with a Ki value of 2.0 microM. A possible interrelationship between dimethylargininase and nitric oxide synthase is discussed. << Less
Biochemistry 37:4791-4798(1998) [PubMed] [EuropePMC]
This publication is cited by 1 other entry.