Protein Information

Name ATPase
Synonyms ATP7A; MK; ATPase; Cation transporting ATPase; ATP7A protein; ATPase Cu(2+) transporting alpha polypeptide; Copper pump 1; Copper transporting ATPase 1…

Compound Information

Name oxamate
CAS hexyl 2-(diethylamino)-2-oxoacetate

Reference List

PubMed Abstract RScore(About this table)
19341298 Zeczycki TN, St Maurice M, Jitrapakdee S, Wallace JC, Attwood PV, Cleland WW: Insight into the carboxyl transferase domain mechanism of pyruvate carboxylase from Rhizobium etli. Biochemistry. 2009 May 26;48(20):4305-13.

The effects of mutations in the active site of the carboxyl transferase domain of Rhizobium etli pyruvate carboxylase have been determined for the forward reaction to form oxaloacetate, the reverse reaction to form MgATP, the oxamate-induced decarboxylation of oxaloacetate, the phosphorylation of MgADP by carbamoyl phosphate, and the bicarbonate-dependent ATPase reaction.
81(1,1,1,1) Details
1445229 Attwood PV, Graneri BD: Bicarbonate-dependent ATP cleavage catalysed by pyruvate carboxylase in the absence of pyruvate. Biochem J. 1992 Nov 1;287 ( Pt 3):1011-7.

The HCO3 (-)-dependent MgATP cleavage is also sensitive to inhibition by a pyruvate carboxylase inhibitor, oxamate, and the dependence of the reaction on the free Mg2+ concentration is similar to that of the pyruvate-carboxylation reaction, whereas the HCO3 (-)-independent MgATP cleavage is not dependent on the concentration of free Mg2+ in the range tested.
This indicates that MgATP cleavage by pyruvate carboxylase is entirely dependent on the presence of HCO3- and that there may be a low level of ATPase contamination in the enzyme preparations.
1(0,0,0,1) Details
15030490 Sueda S, Islam MN, Kondo H: Protein engineering of pyruvate carboxylase: investigation on the function of acetyl-CoA and the quaternary structure. Eur J Biochem. 2004 Apr;271(7):1391-400.

The two proteins thus formed, PC-(BC) and PC-(CT+BCCP), retained their catalytic activity as assayed by biotin-dependent ATPase and oxamate-dependent oxalacetate decarboxylation, for the former and the latter, respectively.
31(0,1,1,1) Details