carboxylase

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carboxylase

[kahr-bok´sĭ-lās]

an enzyme that catalyzes the removal of carbon dioxide from the carboxyl group of alpha amino keto acids.

car·box·yl·ase

(kar-bok'sil-ās),

1. One of several carboxy-lyases, trivially named carboxylases or decarboxylases, 4.1.1.x), catalyzing the addition of CO₂ to all or part of another molecule to create an additional -COOH group (for example, ribulose-1,5-bisphosphate carboxylase).

2. Name occasionally applied to pyruvate decarboxylase.

Farlex Partner Medical Dictionary © Farlex 2012

car·box·yl·ase

(kahr-bok'sil-ās)

One of several carboxylyases catalyzing the addition of CO₂ to another molecule to create an additional -COOH group.

Medical Dictionary for the Health Professions and Nursing © Farlex 2012

carboxylase

an enzyme that assists in the CARBOXYLATION or decarboxylation of a SUBSTRATE (3).

Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005

References in periodicals archive ?

Acetyl-CoA carboxylase catalyzes the conversion of acetyl-CoA into malonyl-CoA, which constitutes the initial reaction in fatty acid biosynthesis [26].

Sasaki, "Acetyl-CoA carboxylase in higher plants: most plants other than gramineae have both the prokaryotic and the eukaryotic forms of this enzyme," Plant & Cell Physiology, vol.

Dormann, "Increased fatty acid production in potato by engineering of acetyl-CoA carboxylase," Planta, vol.

Transcriptome Analysis Reveals Dynamic Fat Accumulation in the Walnut Kernel

Suormala, "Multiple carboxylase deficiency: inherited and acquired disorders of biotin metabolism," International Journal for Vitamin and Nutrition Research, vol.

Dietary Biotin Supplementation Modifies Hepatic Morphology without Changes in Liver Toxicity Markers

Physical and kinetic properties of photosynthetic PEP carboxylase in developing apple fruit.

Phosphoenolpyruvate carboxylase: A new era of structural biology.

Effect of sulfite on phosphoenol pyruvate carboxylase of maize (Zea mays)

Well-watered [right arrow] Moisture stressed [[Psi].sub.leaf] (MPa) -1.0 -1.9 -2.8 PS-[CO.sub.2] ([micro] 44 27 13 mol [m.sup.-2] [s.sup.-1]) PR-[O.sub.2] ([micro] mol 33 24 13 [m.sup.-2] [s.sup.-1]) Energy dissipation (%): PS 26 16 9 PR 20 14 9 Total 46 30 18 To what extent rubisco acts as carboxylase or oxygenase depends upon the relative concentrations of [CO.sub.2] and [O.sub.2] presented to the enzyme.

Another alternative route occurs at the end of glycolysis where a "malate shunt" (Amthor, 1994a) may bypass pyruvate kinase through production of malate from PEP by PEP carboxylase. The shunt is favored when ADP is in short supply.

Variations in [K.sub.m]([CO.sub.2]) of ribulose-1,5-bisphosphate carboxylase among grasses.

Yield Potential, Plant Assimilatory Capacity, and Metabolic Efficiencies

Among enzymes involved in lipogenesis, acetyl- coenzyme A carboxylase a (ACACA) has been considered for its special regulatory role in fatty acid biosynthesis by catalyzing the ATP-dependent formation of malonyl-coenzyme A (Cronan and Waldrop, 2002; Badaoui et al., 2007; Garcia -fernandez et al, 2010).

Human acetyl-CoA carboxylase: characterization molecular cloning, and evidence for two isoforms.

Goat acetyl-coenzyme A carboxylase alpha: molecular characterization, polymorphism, and association with milk traits.

ASSOCIATION OF THE ACETYL-COENZYME-A CARBOXYLASE a EXON 1 GENETIC PATTERNS WITH MILK TRAITS IN MAHABADI GOAT