Abstract:
:The KIAA0101/p15(PAF)/OEATC-1 protein was initially isolated in a yeast two-hybrid screen for proliferating cell nuclear antigen (PCNA) binding partners, and was shown to bind PCNA competitively with the cell cycle regulator p21(WAF). PCNA is involved in DNA replication and damage repair. Using polyclonal antisera raised against a p15(PAF) fusion protein, we have shown that in a range of mammalian tumor and non-tumor cell lines the endogenous p15(PAF) protein localises to the nucleus and the mitochondria. Under normal conditions no co-localisation with PCNA could be detected, however following exposure to UV it was possible to co-immunoprecipitate p15(PAF) and PCNA from a number of cell lines, suggesting a UV-enhanced association of the two proteins. Overexpression of p15(PAF) in mammalian cells was also found to protect cells from UV-induced cell death. Based on similarities between the behaviour of p15(PAF) and the potential tumor suppressor product p33ING1b, we have further shown that these two proteins interact in the same complex in cell cultures. This suggests that p15(PAF) forms part of a larger protein complex potentially involved in the regulation of DNA repair, apoptosis and cell cycle progression.
journal_name
Exp Cell Resjournal_title
Experimental cell researchauthors
Simpson F,Lammerts van Bueren K,Butterfield N,Bennetts JS,Bowles J,Adolphe C,Simms LA,Young J,Walsh MD,Leggett B,Fowles LF,Wicking Cdoi
10.1016/j.yexcr.2005.09.020keywords:
subject
Has Abstractpub_date
2006-01-01 00:00:00pages
73-85issue
1eissn
0014-4827issn
1090-2422pii
S0014-4827(05)00453-2journal_volume
312pub_type
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