SRP3134
p16-INK-4a
recombinant, expressed in E. coli, lyophilized, ≥95% (SDS-PAGE), ≥95% (HPLC), suitable for mammalian cell culture
Synonym(s):
CDK4I, Cyclin-dependent kinase 4 inhibitor A, Cyclin-dependent kinase inhibitor 2A, Multiple tumor suppressor 1, p16-INK4, p16INK4A
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About This Item
UNSPSC Code:
12352202
NACRES:
NA.32
Product Name
p16-INK-4a human, recombinant, expressed in E. coli, ≥95% (SDS-PAGE), ≥95% (HPLC), suitable for cell culture
biological source
human
recombinant
expressed in E. coli
assay
≥95% (HPLC), ≥95% (SDS-PAGE)
form
lyophilized
mol wt
16.5 kDa
packaging
pkg of 20 μg
technique(s)
cell culture | mammalian: suitable
impurities
<0.1 EU/μg endotoxin, tested
color
off-white to yellow
UniProt accession no.
shipped in
wet ice
storage temp.
−20°C
Gene Information
human ... CDKN2A(1029)
General description
p16-INK4a, which is also known as cyclin dependent kinase inhibitor 2A (CDKN2A), is a nuclear protein. The gene encoding this protein is localized on human chromosome 9p21, with three exons. Recombinant p16-INK4a is a 16.5kDa protein containing 156 amino acid residues.
Biochem/physiol Actions
Cyclin dependent kinase inhibitor 2A (CDKN2A) or p16-INK4a regulates the cell cycle by inhibiting cyclin dependent kinase-4 (CDK4) and CDK6. It inhibits CDK activity by binding to the CDK molecules in a manner that interferes with their ability to interact with cyclin D. This activity has the effect of suppressing tumor formation and growth, and of inducing replicative senescence in various normal cells, including stem cells. The expression of p16-INK4a steadily increases with age and tends to accumulate in stem cell compartments. The deletion, rearrangement, or mutation of the p16-INK4a gene is frequently found in melanomas as well as in certain other types of cancer. The protein is downregulated in bladder cancer.
Physical form
Lyophilized from 1 x PBS + 1.0 mM DTT, pH 7.2.
Preparation Note
Centrifuge the vial prior to opening. Reconstitute in water to a concentration of 0.1-1.0 mg/ml. Do not vortex. This solution can be stored at 2-8°C for up to 1 week. For extended storage, it is recommended to further dilute in a buffer containing a carrier protein (example 0.1% BSA) and store in working aliquots at -20°C to -80°C.
Other Notes
MEPAAGSSME PSADWLATAA ARGRVEEVRA LLEAGALPNA PNSYGRRPIQ VMMMGSARVA ELLLLHGAEP NCADPATLTR PVHDAAREGF LDTLVVLHRA GARLDVRDAW GRLPVDLAEE LGHRDVARYL RAAAGGTRGS NHARIDAAEG PSDIPD
signalword
Warning
hcodes
Hazard Classifications
Eye Irrit. 2
Storage Class
13 - Non Combustible Solids
wgk
WGK 3
flash_point_f
Not applicable
flash_point_c
Not applicable
Regulatory Information
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Prognostic and Clinicopathological Significance of Downregulated p16 Expression in Patients with Bladder Cancer: A Systematic Review and Meta-Analysis.
Gan X
Disease Markers, 5259602-5259602 (2016)
Prevalence of p16 and CDK4 germline mutations in 48 melanoma-prone families in France. The French Familial Melanoma Study Group.
Soufir N
Human Molecular Genetics, 7(2), 209-216 (1998)
Immunohistological Expression of p16INK4a is Commonly Present Both in Benign and Malignant Sweat Gland Neoplasias.
Tsujita J
Fukuoka Igaku Zasshi = Hukuoka Acta Medica, 106(12), 323-329 (2015)
Jinsuke Nishino et al.
Cell, 135(2), 227-239 (2008-10-30)
Stem cells persist throughout life in diverse tissues by undergoing self-renewing divisions. Self-renewal capacity declines with age, partly because of increasing expression of the tumor suppressor p16(Ink4a). We discovered that the Hmga2 transcriptional regulator is highly expressed in fetal neural
A Okamoto et al.
Proceedings of the National Academy of Sciences of the United States of America, 91(23), 11045-11049 (1994-11-08)
Cell cycle arrest at the G1 checkpoint allows completion of critical macromolecular events prior to S phase. Regulators of the G1 checkpoint include an inhibitor of cyclin-dependent kinase, p16INK4; two tumor-suppressor proteins, p53 and RB (the product of the retinoblastoma-susceptibility
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