sucrase
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Definition
Noun: * An enzyme that catalyzes the hydrolysis of sucrose into its component monosaccharides, glucose and fructose. It is a type of carbohydrase, a digestive enzyme that breaks down sugars.
Usage
- Sucrase is a specific, scientific term used primarily in biological, biochemical, and medical contexts.
- It refers to the biological catalyst responsible for digesting common table sugar (sucrose).
- The word is typically used as a non-count noun when referring to the enzyme in general, but can be countable when referring to types or specific instances (e.g., intestinal sucrase).
Examples
- The enzyme sucrase is produced by the cells lining the small intestine.
- A deficiency in sucrase can lead to digestive problems after consuming sucrose.
- The experiment measured the activity of sucrase under different pH conditions.
Advanced Usage
- Sucrase-isomaltase complex: This is the specific form of the enzyme found in the human intestinal brush border. It has two active sites: one for sucrose (sucrase activity) and one for isomaltose and maltose (isomaltase activity).
- Congenital sucrase-isomaltase deficiency (CSID): A genetic disorder where individuals lack functional sucrase-isomaltase complex, leading to an inability to properly digest sucrose and some other sugars.
Variants and Related Words
- Invertase: A synonym for sucrase, commonly used in industrial and yeast biology contexts. The reaction it catalyzes is called "inversion," producing "invert sugar."
- Carbohydrase: The general class of enzymes that break down carbohydrates, which includes sucrase, lactase, and amylase.
- Disaccharidase: The subclass of carbohydrases that break down disaccharides (double sugars). Sucrase is a disaccharidase.
Synonyms
- Invertase
- Beta-fructofuranosidase (a more precise systematic name)
Related Terms and Concepts
- Substrate: The specific molecule an enzyme acts upon. For sucrase, the substrate is sucrose.
- Products: The molecules resulting from the enzymatic reaction. For sucrase, the products are glucose and fructose.
- Hydrolysis: The type of chemical reaction catalyzed by sucrase, where a water molecule is used to break a chemical bond.
Noun
- an enzyme that catalyzes the hydrolysis of sucrose into glucose and fructose