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

1. an enzyme that catalyzes the hydrolysis of sucrose into glucose and fructose