What Is 2-amino-2-deoxy-D-glucose chitosamine

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Last updated: April 15, 2026

Quick Answer: 2-Amino-2-deoxy-D-glucose, commonly known as chitosamine or D-glucosamine, is a naturally occurring amino sugar with the molecular formula C6H13NO5. It is a key building block of chitin, found in fungal cell walls and arthropod exoskeletons, and is widely used in dietary supplements for joint health.

Key Facts

2-Amino-2-deoxy-D-glucose has the molecular formula C6H13NO5 and a molar mass of 179.17 g/mol
It is the monomeric unit of chitosan, derived from deacetylation of chitin
Glucosamine supplements are commonly sourced from shellfish shells
Over 70% of osteoarthritis patients in the U.S. use glucosamine supplements
Chitosamine is structurally similar to glucose but has an amino group at carbon 2

Overview

2-Amino-2-deoxy-D-glucose, also known as D-glucosamine or chitosamine, is an amino sugar that plays a fundamental role in carbohydrate chemistry and biology. It is a derivative of glucose in which the hydroxyl group on carbon 2 is replaced by an amino group, giving it unique biochemical properties essential for structural polysaccharides.

This compound is most notable as the primary monomer in chitin, one of the most abundant biopolymers on Earth. Chitin provides structural support in fungal cell walls, insect exoskeletons, and crustacean shells, and its deacetylated form, chitosan, is used in biomedical and industrial applications.

Chemical formula: The molecular formula of 2-amino-2-deoxy-D-glucose is C6H13NO5, with a molar mass of 179.17 g/mol.
Isomer specificity: It is the D-isomer of glucosamine, which is the biologically active form found in nature and used in supplements.
Natural sources: It is primarily extracted from chitin in shellfish shells, such as shrimp and crab, through alkaline deacetylation.
Biological role: It serves as a precursor for glycosaminoglycans like hyaluronic acid and keratan sulfate, vital for cartilage and joint fluid.
Supplement forms: Available as glucosamine sulfate, hydrochloride, or N-acetyl derivatives, with sulfate being the most studied for osteoarthritis.

How It Works

2-Amino-2-deoxy-D-glucose functions at the biochemical level by integrating into larger carbohydrate structures and modulating cellular processes. Its amino group allows for chemical modifications that influence solubility, reactivity, and biological activity.

Chitin formation:Multiple glucosamine units link via β-1,4-glycosidic bonds to form chitin, a tough, nitrogen-containing polysaccharide.
Chitosan production: When chitin undergoes deacetylation above 50%, it becomes chitosan, which is water-soluble and biocompatible.
Joint health mechanism: Glucosamine is believed to stimulate proteoglycan synthesis in cartilage, aiding in joint repair and lubrication.
Anti-inflammatory effects: Studies show glucosamine can inhibit NF-κB signaling, reducing inflammation in joint tissues.
Bioavailability: Oral glucosamine is well-absorbed in the gut, with peak plasma levels reached within 2–4 hours after ingestion.
Metabolic pathway: It enters the hexosamine biosynthesis pathway, influencing glycosylation of proteins and cell signaling.

Comparison at a Glance

The following table compares 2-amino-2-deoxy-D-glucose with related compounds based on structure, source, and applications:

Compound	Molecular Formula	Primary Source	Key Use	Solubility
2-Amino-2-deoxy-D-glucose	C6H13NO5	Shellfish chitin	Dietary supplements	Water-soluble
Glucose	C6H12O6	Plants, blood sugar	Energy metabolism	Highly soluble
N-Acetylglucosamine	C8H15NO6	Chitin, hyaluronic acid	Glycobiology research	Moderately soluble
Chitosan	(C6H11NO4)n	Deacetylated chitin	Drug delivery, wound healing	Soluble in acidic water
Glucosamine sulfate	C6H13NO5·H2SO4	Synthetic or natural	Osteoarthritis treatment	Highly soluble

These comparisons highlight how minor structural changes, such as acetylation or sulfation, significantly alter solubility and function. While glucose serves as a universal energy source, glucosamine derivatives are specialized for structural and signaling roles in connective tissues.

Why It Matters

Understanding 2-amino-2-deoxy-D-glucose is crucial for advancing medical, agricultural, and environmental technologies. Its role in natural biopolymers and human health makes it a compound of broad scientific and commercial interest.

Medical applications: Glucosamine supplements are used by over 70% of osteoarthritis patients in the U.S., often in combination with chondroitin.
Biodegradable materials: Chitosan, derived from glucosamine, is used to make biodegradable films and drug carriers in pharmaceuticals.
Wound healing: Chitosan-based dressings promote hemostasis and tissue regeneration due to antimicrobial and bioadhesive properties.
Agricultural use: Chitosan acts as a biopesticide and plant growth enhancer, reducing reliance on synthetic chemicals.
Environmental remediation: Chitosan binds heavy metals, enabling its use in water purification systems for industrial effluents.
Research significance: It is a model compound for studying glycosylation disorders and developing glycomimetic drugs.

As research continues, the applications of 2-amino-2-deoxy-D-glucose are expanding into tissue engineering, nutraceuticals, and sustainable materials, underscoring its multidisciplinary importance.