Protein Information

Name P27
Synonyms FAM14D; p27; IFI27; ISG12; ISG12(a) protein; Interferon alpha induced 11.5 kDa protein; Interferon alpha inducible protein 27; ISG12(a) proteins…

Compound Information

Name cycloheximide
CAS

Reference List

PubMed Abstract RScore(About this table)
17407140 Fu Y, Fang Z, Liang Y, Zhu X, Prins P, Li Z, Wang L, Sun L, Jin J, Yang Y, Zha X: Overexpression of integrin beta1 inhibits proliferation of hepatocellular carcinoma cell SMMC-7721 through preventing Skp2-dependent degradation of p27 via PI3K pathway. J Cell Biochem. 2007 Oct 15;102(3):704-18.

Cycloheximide (Chx) treatment and pulse-chase experiments revealed that overexpression of integrin beta1 prolonged the half-life of p27 (Kip1) by inhibiting its degradation.
37(0,1,1,7) Details
17938263 Roy S, Kaur M, Agarwal C, Tecklenburg M, Sclafani RA, Agarwal R: p21 and p27 induction by silibinin is essential for its cell cycle arrest effect in prostate carcinoma cells. Mol Cancer Ther. 2007 Oct;6(10):2696-707.

Next, studies were done to examine mechanisms of their induction where cycloheximide-chase experiments showed that silibinin increases p21 and p27 protein half-life.
11(0,0,1,6) Details
19424645 Lee EY, Jeon MJ, Yang W, Shin I: Effect of p27 on motility of MDA-MB-231 breast cancer cells. Oncol Rep. 2009 Jun;21(6):1621-5.

Wound healing assays revealed that migration of MDA-MB-231 hpshRNA cells was markedly impaired compared to MDA-MB-231 mpshRNA cells, especially when cycloheximide was added to block protein synthesis.
7(0,0,0,7) Details
17475922 Egozi D, Shapira M, Paor G, Ben-Izhak O, Skorecki K, Hershko DD: Regulation of the cell cycle inhibitor p27 and its ubiquitin ligase Skp2 in differentiation of human embryonic stem cells. FASEB J. 2007 Sep;21(11):2807-17. Epub 2007 May 2.

7(0,0,0,7) Details
19591933 Mishra A, Godavarthi SK, Jana NR: UBE3A/E6-AP regulates cell proliferation by promoting proteasomal degradation of p27. Neurobiol Dis. 2009 Oct;36(1):26-34. Epub 2009 Jul 8.

5(0,0,0,5) Details
16407831 Taube ME, Liu XW, Fridman R, Kim HR: TIMP-1 regulation of cell cycle in human breast epithelial cells via stabilization of p27 (KIP1) protein. Oncogene. 2006 May 18;25(21):3041-8.

4(0,0,0,4) Details
16859513 Shapira M, Kakiashvili E, Rosenberg T, Hershko DD: The mTOR inhibitor rapamycin down-regulates the expression of the ubiquitin ligase subunit Skp2 in breast cancer cells. Breast Cancer Res. 2006;8(4):R46.

The decrease in p27 levels is mainly the result of enhanced proteasome-dependent degradation mediated by its specific ubiquitin ligase subunit S phase kinase protein 2 (Skp2).
The effect of rapamycin on the degradation rate of Skp2 expression was examined in cycloheximide-treated cells and in relationship to the anaphase promoting complex/Cdh1 (APC\C) inhibitor Emi1.
3(0,0,0,3) Details
19602254 Bangiyeva V, Rosenbloom A, Alexander AE, Isanova B, Popko T, Schoenfeld AR: Differences in regulation of tight junctions and cell morphology between VHL mutations from disease subtypes. BMC Cancer. 2009 Jul 14;9:229.


RESULTS: As a whole, type 1 mutants varied greatly from type 2 mutants, demonstrating high levels of HIF-2alpha, cyclin D1 and alpha5 integrin, lower p27 levels, and a spindly, fibroblastic cellular appearance.
2(0,0,0,2) Details
19009649 Guller M, Toualbi-Abed K, Legrand A, Michel L, Mauviel A, Bernuau D, Daniel F: c-Fos overexpression increases the proliferation of human hepatocytes by stabilizing nuclear Cyclin D1. World J Gastroenterol. 2008 Nov 7;14(41):6339-46.

The levels of cell cycle regulatory proteins (Cyclin D1, E, A) cyclin dependent kinases (cdk) cdk2, cdk4, cdk6, and their inhibitors p15, p16, p21, p27, total and phosphorylated GSK-3beta and epidermal growth factor receptor (EGF-R) were assayed by Western blotting.
Stability of Cyclin D1 was studied by cycloheximide blockade experiments.
1(0,0,0,1) Details
17338678 Shenkman M, Tolchinsky S, Kondratyev M, Lederkremer GZ: Transient arrest in proteasomal degradation during inhibition of translation in the unfolded protein response. Biochem J. 2007 Jun 15;404(3):509-16.


Stabilization of p27 through this mechanism may explain the cell cycle arrest in G1 when translation is blocked by inhibitors or by the UPR.
1(0,0,0,1) Details
15964852 Zhu H, Nie L, Maki CG: Cdk2-dependent Inhibition of p21 stability via a C-terminal cyclin-binding motif. J Biol Chem. 2005 Aug 12;280(32):29282-8. Epub 2005 Jun 17.


p21 is a member of the Cip/Kip family of cyclin-dependent kinase (CDK) inhibitors that includes p21, p27, and p57.
1(0,0,0,1) Details
16206267 Lovborg H, Oberg F, Rickardson L, Gullbo J, Nygren P, Larsson R: Inhibition of proteasome activity, nuclear factor-KappaB translocation and cell survival by the antialcoholism drug disulfiram. Int J Cancer. 2006 Mar 15;118(6):1577-80.


Disulfiram was also able to induce accumulation of p27 (Kip1) and to prolong the half-life of c-Myc, both targets for proteasome-dependent degradation.
1(0,0,0,1) Details
17989348 Papineni S, Chintharlapalli S, Safe S: Methyl 2-cyano-3,11-dioxo-18 beta-olean-1,12-dien-30-oate is a peroxisome proliferator-activated receptor-gamma agonist that induces receptor-independent apoptosis in LNCaP prostate cancer cells. Mol Pharmacol. 2008 Feb;73(2):553-65. Epub 2007 Nov 7.


In contrast, beta-CDODA-Me also decreased androgen receptor (AR) and prostate-specific antigen (PSA) mRNA and protein levels through kinase-independent pathways. beta-CDODA-Me repressed AR mRNA transcription, whereas decreased PSA mRNA levels were dependent on protein synthesis and were reversed by cycloheximide.
0(0,0,0,0) Details
16894473 Fu Y, Wang LY, Liang YL, Jin JW, Fang ZY, Zha XL: Integrin beta (1A) upregulates p27 protein amount at the post-translational level in human hepatocellular carcinoma cell line SMMC-7721. Acta Biochim Biophys Sin. 2006 Aug;38(8):523-30.

Cycloheximide treatment experiment revealed that the half-life of p27 protein was prolonged in integrin beta1A overexpressing cells, indicating that integrin beta (1A) inhibited the degradation of p27 protein.
85(1,1,1,5) Details
16879986 Godbole D, Mojamdar M, Pal JK: Increased level of p27 subunit of proteasomes and its co-localization with tyrosinase in amelanotic melanoma cells indicate its direct role in the regulation of melanin biosynthesis. Cell Biol Int. 2006 Nov;30(11):895-902. Epub 2006 Jun 30.

On exposure to cycloheximide, increased Tyr degradation was seen in amelanotic cells, as indicated by increased co-localization of p27 and Tyr.
85(1,1,1,5) Details