Coenzyme A

Updated: 2026-09-19

Overview

Coenzyme A (CoA) is a fundamental coenzyme present in all living cells, playing a central role in metabolism. It acts as a carrier of acyl groups in biochemical reactions, particularly in fatty acid synthesis and degradation, as well as the citric acid cycle. Discovered in 1945, CoA is derived from pantothenic acid (vitamin B5), adenosine triphosphate (ATP), and cysteine. In industrial and research settings, CoA is synthesized for use in biochemical assays, pharmaceutical production, and metabolic studies. Its acetylated form, acetyl-CoA, is a key intermediate in energy production pathways, making it indispensable in cellular respiration and biosynthesis processes.

Physical and Chemical Properties

Coenzyme A is a white to off-white crystalline powder with high water solubility due to its polar molecular structure. Its chemical stability is moderate, but it degrades under prolonged exposure to light, heat, or oxidizing agents. The molecule features a reactive thiol (-SH) group, which forms thioester bonds with acyl groups during metabolic reactions. The molecular weight of CoA is 767.53 g/mol, and it is typically stored at -20°C to maintain stability. Analytical techniques such as HPLC and UV spectroscopy are commonly used to assess its purity, which is critical for research and industrial applications.

Main Applications

Coenzyme A is widely utilized in biochemical and pharmaceutical research, particularly in studies involving lipid metabolism, enzyme kinetics, and energy production pathways. It serves as a substrate or cofactor in enzymatic reactions, including those catalyzed by acetyl-CoA carboxylase and citrate synthase. In the pharmaceutical industry, CoA is used in the synthesis of antibiotics, statins, and other therapeutics targeting metabolic disorders. Additionally, it finds applications in diagnostic kits and cell culture media, where its role in metabolism is leveraged to study disease mechanisms or optimize bioprocesses.

Safety and Storage

Coenzyme A should be handled with care to prevent degradation or contamination. It is recommended to use gloves and work in a well-ventilated area to avoid inhalation or skin contact. The compound is hygroscopic and sensitive to oxidation, requiring storage in airtight containers under inert gas (e.g., nitrogen) at -20°C. Disposal should follow local regulations for biochemical waste. In case of exposure, rinse affected areas with water and seek medical advice if irritation persists. Stability tests indicate that CoA retains its activity for up to two years when stored properly.

B2B Procurement Guide

When procuring Coenzyme A for industrial or research purposes, buyers should prioritize suppliers with certifications such as ISO 9001 or GMP. Key specifications include purity (≥90-95%), endotoxin levels (if for cell culture), and batch-to-batch consistency. Cold-chain logistics are essential to maintain product integrity during transportation. Bulk purchases (e.g., 10-100 grams) often qualify for discounts, but sample testing is advisable before large-scale orders. Leading manufacturers include Sigma-Aldrich, Thermo Fisher Scientific, and specialized biochemical suppliers in the U.S., Europe, and China.