Anti-Ki67 Antibody (monoclonal, 5E12)

Ki-67 (Proliferation-related Ki-67 antigen), also known as MKI67 or KIA, is a protein that in humans is encoded by the MKI67 gene. From study of a panel of human-rodent somatic cell hybrids, it has been demonstrated that a gene involved in the expression of the MKI67 antigen is located on chromosome 10. By in situ hybridization, Fonatsch et al. (1991) regionalized the MKI67 gene to chromosome 10q25-qter. By FISH, Traut et al. (1998) mapped the mouse Mki67 gene to chromosome 7F3-F5. Antigen KI-67 is a nuclear protein that is associated with and may be necessary for cellular proliferation. Furthermore it is associated with ribosomal RNA transcription. Inactivation of antigen KI-67 leads to inhibition of ribosomal RNA synthesis.

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In complex with TSC1, this tumor suppressor inhibits the nutrient-mediated or growth factor-stimulated phosphorylation of S6K1 and EIF4EBP1 by negatively regulating mTORC1 signaling (PubMed:12271141, PubMed:28215400) . Acts as a GTPase-activating protein (GAP) for the small GTPase RHEB, a activator of the protein kinase activity of mTORC1 (PubMed:15340059) . May also play a role in microtubule-mediated protein transport (By similarity) . Also stimulates the intrinsic GTPase activity of the Ras-related proteins RAP1A and RAB5 (By similarity) .

1. Fonatsch, C., Duchrow, M., Rieder, H., Schluter, C., Gerdes, J. Assignment of the human Ki-67 gene (MKI67) to 10q25-qter. Genomics 11: 476-477, 1991. 2. Schonk, D. M., Kuijpers, H. J. H., vanDrunen, E., vanDalen, C. H., Geurts van Kessel, A. H. M., Verheijen, R., Ramaekers, F. C. S. Assignment of the gene (s) involved in the expression of the proliferation-related Ki-67 antigen to human chromosome 10. Hum. Genet. 83: 297-299, 1989. 3. Traut, W., Scholzen, T., Winking, H., Kubbutat, M. H. G., Gerdes, J. Assignment of the murine Ki-67 gene (Mki67) to chromosome band 7F3-F5 by in situ hybridization. Cytogenet. Cell Genet. 83: 12-13, 1998.

Store at -20°C for one year from date of receipt. After reconstitution, at 4°C for one month. It can also be aliquotted and stored frozen at -20°C for six months. Avoid repeated freeze-thaw cycles.