Microtubules and Glyceraldehyde-3-phosphate dehydrogenase (Microtubules and GAPDH)

Microtubules are dynamic cytoskeletal polymers composed of tubulin subunits that are essential for maintaining cell shape, enabling intracellular transport, and facilitating chromosome segregation during mitosis (UniProt P07437). Glyceraldehyde-3-phosphate dehydrogenase (GAPDH) is a multifunctional enzyme primarily known for its role in glycolysis, but it also acts as a moonlighting protein involved in membrane trafficking and microtubule bundling (UniProt P04406). The interaction between GAPDH and microtubules is vital for the organization of the cytoskeleton and the regulation of metabolic enzyme localization within the cell (PubMed: 2153137). In various cancers, microtubule dynamics are frequently altered, making them a primary target for chemotherapeutic agents like taxanes and vinca alkaloids (PubChem). In neurodegenerative diseases, the association of GAPDH with proteins like alpha-synuclein or amyloid-beta can impair its ability to stabilize microtubules, contributing to axonal transport defects (PubMed: 15159520). Therapeutic strategies involving these targets often focus on stabilizing microtubule structures or inhibiting the pro-apoptotic functions of GAPDH in stressed neurons (PubMed: 25665524). While drugs like paclitaxel directly bind tubulin, experimental compounds such as omigapil have been investigated for their ability to bind GAPDH and prevent cell death (PubChem CID 119231). Overall, the functional synergy between microtubules and GAPDH represents a complex regulatory node in both cellular metabolism and structural integrity.

Other names

Tubulin and GAPDHGAPDH-Microtubule complexGlyceraldehyde-3-phosphate dehydrogenase and Tubulin

Drugs targeting this pair typically act by stabilizing or destabilizing microtubule polymers (e.g., taxanes, vinca alkaloids) or by inhibiting the enzymatic or pro-apoptotic activities of GAPDH (e.g., omigapil).