oxalacetate
Definition
Noun: 1. A salt or ester of oxalacetic acid: Oxalacetate is a chemical compound that is either the salt form (where the acidic hydrogen of oxalacetic acid is replaced by a metal or other cation) or the ester form (where the acidic hydrogen is replaced by an organic group) of oxalacetic acid. It is a key intermediate in several fundamental metabolic pathways in living organisms.
Usage Examples
- Noun:
- Oxalacetate is a crucial substrate in the citric acid cycle.
- The enzyme catalyzes the conversion of malate to oxalacetate.
- Researchers measured the cellular concentration of oxalacetate.
Advanced Usage
- Biochemical Context: In biochemistry, "oxalacetate" almost exclusively refers to the anionic form (OAA) of oxalacetic acid that participates in cellular metabolism. It is a four-carbon molecule central to the citric acid cycle (Krebs cycle), gluconeogenesis, and amino acid synthesis.
- The availability of oxalacetate can regulate the rate of the citric acid cycle.
Variants and Related Words
- Oxaloacetate (n): This is the more common modern spelling and is used interchangeably with "oxalacetate." Both refer to the same compound.
- Oxaloacetate is formed from pyruvate by the enzyme pyruvate carboxylase.
- Oxalacetic Acid (n): The parent dicarboxylic acid from which oxalacetate is derived.
- OAA (n): A common initialism for Oxaloacetate/Oxalacetate.
Synonyms
- Oxaloacetate (n): The synonymous spelling.
Related Concepts (Not Synonyms)
- Metabolite (n): A substance involved in metabolism. Oxalacetate is a key metabolite.
- Intermediate (n): A chemical compound formed in one step of a pathway and consumed in the next. Oxalacetate is a critical metabolic intermediate.
- Krebs Cycle Intermediate (n): A substance that is part of the citric acid cycle.
Noun
-
a salt or ester of oxalacetic acid
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