NADase
NADase (or NAD+ase) refers to a group of enzymes playing a pivotal role in cellular longevity and aging due to its direct implication in the modulation of NAD+ levels within the cell. NAD+, or Nicotinamide Adenine Dinucleotide, is a crucial coenzyme that participates in numerous metabolic and cellular processes, including energy metabolism, DNA repair, and the regulation of cellular aging. Elevated NADase activity can lead to decreased NAD+ levels, affecting cellular metabolism, reducing energy production, and potentially accelerating aging processes and age-related diseases.
Enzyme Reaction
NADase catalyzes the hydrolysis of NAD+, a reaction which can be represented as follows:
This reaction is pivotal as it regulates the levels of NAD+ available in the cell, directly impacting cellular energy metabolism, DNA repair mechanisms, and aging processes.
Known NADase Enzymes
NADase or NAD^+ase enzymes have implications in longevity due to their impact on NAD+ levels within cells. NAD+ is crucial for cellular energy metabolism and maintenance of proper cellular function. Here is some information on known NADase enzymes.
| Enzyme | Description | Function | Location/Expression | Implications in Aging | Associated Diseases |
|---|---|---|---|---|---|
| CD38 | CD38 is a multifunctional enzyme involved in calcium signaling and plays a role in immune response, cellular metabolism, and NAD+ homeostasis. | Calcium signaling, cell adhesion, immune response. | Widely expressed in various tissues, including immune cells. | Involved in cellular aging processes, and its activity has been linked to a reduction in cellular NAD+ levels. | Chronic inflammatory conditions, some leukemias |
| CD157 | CD157, also known as bone marrow stromal antigen 1, is involved in monocyte and neutrophil infiltration during inflammatory responses and has implications in leukocyte trafficking. | Monocyte and neutrophil infiltration during inflammatory responses. | Primarily expressed in bone marrow and myeloid cells. | Its roles in inflammation might have implications in aging-related inflammatory conditions. | Autoimmune diseases, some cancers |
| SARM1 | SARM1 (Sterile Alpha and TIR Motif Containing 1) is predominantly known for its role in programmed axon degeneration and has implications in neurodegenerative conditions. | Induces axonal degeneration after injury, involved in innate immune response. | Predominantly expressed in the nervous system. | Its role in axon degeneration has implications in aging-related neurodegenerative conditions. | Neurodegenerative diseases |