Abstract：
:Concomitant expression of mutant p53 and oncogenic Ras, leading to cellular transformation, is well documented. However, the mechanisms by which the various mutant p53 categories cooperate with Ras remain largely obscure. From this study we suggest that different mutant p53 categories cooperate with H-Ras in different ways to induce a unique expression pattern of a cancer-related gene signature (CGS). The DNA-contact p53 mutants (p53(R248Q) and p53(R273H)) exhibited the highest level of CGS expression by cooperating with NFκB. Furthermore, the Zn(+2) region conformational p53 mutants (p53(R175H) and p53(H179R)) induced the CGS by elevating H-Ras activity. This elevation in H-Ras activity stemmed from a perturbed function of the p53 transcription target gene, BTG2. By contrast, the L3 loop region conformational mutant (p53(G245S)) did not affect CGS expression. Our findings were further corroborated in human tumor-derived cell lines expressing Ras and the aforementioned mutated p53 proteins. These data might assist in future tailor-made therapy targeting the mutant p53-Ras axis in cancer.
journal_name
J Cell Scijournal_title
Journal of cell scienceauthors
Solomon H,Buganim Y,Kogan-Sakin I,Pomeraniec L,Assia Y,Madar S,Goldstein I,Brosh R,Kalo E,Beatus T,Goldfinger N,Rotter Vdoi
10.1242/jcs.099663subject
Has Abstractpub_date
2012-07-01 00:00:00pages
3144-52issue
Pt 13eissn
0021-9533issn
1477-9137pii
jcs.099663journal_volume
125pub_type
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