Anti-PKM2 Antibody Picoband® (monoclonal, 11I4C3) Fluoro550 Conjugated

PKM (Pyruvate Kinase, Muscle), also known as PK3 or PKM2, is an enzyme that in humans is encoded by the PKM gene. The activity of pyruvate kinase subtype M2 is increased by fructose 1, 6-bisphosphate (Fru-1, 6-P2) . By in situ hybridization, Popescu and Cheng (1990) mapped the THBP1 gene to 15q24-q25. Ashizawa et al. (1991) manipulated the intracellular Fru-1, 6-P2 concentration in several mammalian cell lines, including human, by varying the glucose concentration in the media. Using a novel proteomic screen for phosphotyrosine-binding proteins, Christofk et al. (2008) observed that PKM2 binds ly and selectively to tyrosine-phosphorylated peptides.

A synthetic peptide corresponding to a sequence at the N-terminus of human PKM2, different from the related mouse sequence by five amino acids, and from the related rat sequence by four amino acids.

Plays a role in the mitochondrial apoptosic process. Upon arrival of cell death signals, promotes mitochondrial outer membrane (MOM) permeabilization by oligomerizing to form pores within the MOM. This releases apoptogenic factors into the cytosol, including cytochrome c, promoting the activation of caspase 9 which in turn processes and activates the effector caspases.

1. Ashizawa, K., Willingham, M. C., Liang, C.-M., Cheng, S. In vivo regulation of monomer-tetramer conversion of pyruvate kinase subtype M-2 by glucose is mediated via fructose 1, 6-bisphosphate. 2. J. Biol. Chem. 266: 16842-16846, 1991. 2. Christofk, H. R., Vander Heiden, M. G., Wu, N., Asara, J. M., Cantley, L. C. Pyruvate kinase M2 is a phosphotyrosine-binding protein. 3. Nature 452: 181-186, 2008. 3. Popescu, N. C., Cheng, S. Y. Chromosomal localization of the gene for a human cytosolic thyroid hormone binding protein homologous to the subunit of pyruvate kinase, subtype M (2) . Somat. Cell Molec. Genet. 16: 593-598, 1990.