Creative Enzymes is adept at enzyme activity measurement and provides efficient and convenient measurement services. The cutting-edge instruments and extensive experiences allow us to deliver testing results with high accuracy and efficiency. We are especially experienced in assay oxidoreductases, including malate dehydrogenase.

Malate dehydrogenase (EC 1.1.1.37) (MDH) is an enzyme that reversibly catalyzes the oxidation of malate to oxaloacetate accompanied by the reduction of NAD+ to NADH. This enzyme is also known as:

• malate dehydrogenase;
• malic dehydrogenase;
• L-malate dehydrogenase;
• NAD-L-malate dehydrogenase;
• malic acid dehydrogenase;
• NAD-dependent malic dehydrogenase;
• NAD-malate dehydrogenase;
• NAD-malic dehydrogenase;
• malate (NAD) dehydrogenase;
• NAD-dependent malate dehydrogenase;
• NAD-specific malate dehydrogenase;
• NAD-linked malate dehydrogenase;
• MDH;
• L-malate-NAD+ oxidoreductase

The structure of malate dehydrogenase reveals a homodimeric configuration. Each subunit of the dimer has two distinct domains that vary in structure and functionality. A parallel β-sheet structure makes up the domain, while four β-sheets and one α-helix compose the central NAD+ binding site. The subunits are held together through extensive hydrogen-bonding and hydrophobic interactions.

Figure: The structure of malate dehydrogenase from Mycobacterium tuberculosis.
Reference: Davide M. Ferraris et al. Proteins 2015 83: 389-394

Malate dehydrogenase is widely prevalent in most organisms, because it participates in the most important pathway in central metabolism, the tricarboxylic acid (TCA) cycle. The TCA cycle provides the cell with necessary molecules and nutrients by consuming breakdown products of carbohydrates and fatty acids. The cycle produces essential intermediate molecules, reducing agents, and ATP needed for the normal functioning of the cell. Malate dehydrogenase is also involved in gluconeogenesis, the synthesis of glucose from smaller molecules. This pathway is one of several main mechanisms used by humans and many other animals to maintain a steady blood glucose levels, expressly, to help balance the blood sugar and prevent the hypoglycemia disease. Although studies on malate dehydrogenase has been progressing in last several decades, the crystal structure was not reported until recently, which greatly promoted application research of this enzyme. To meet the increasing research demands, Creative Enzymes provides the activity assay service for malate dehydrogenase with high quality and reproducibility.

Creative Enzymes can provide rapid and efficient testing services with reliable results, relying on our advanced equipment and premier benchmark. In the future, Creative Enzymes will continue to be your trust-worthy partner in enzyme produce development.