Abstract：
:In the present study, we characterized an evolutionarily conserved non-transmembrane ATP-binding cassette protein: hABCF3. Subcellular immunofluorescence staining demonstrated that hABCF3 localizes preferentially in cytoplasm, unlike its paralog protein hABCF1, which localizes in both cytoplasm and nucleus. Quantitative realtime PCR analysis revealed that hABCF3 is expressed in all tissues examined, with high expression level in heart, liver, and pancreas. Interestingly, ectopic hABCF3 promoted proliferation of human liver cancer cell lines. Moreover, knock down of hABCF3 protein expression by siRNA inhibited cell proliferation. In addition, we identified TPD52L2 (Tumor Protein D52-like 2) as a hABCF3 interacting protein via yeast two-hybrid. This interaction was further confirmed by in vivo co-immunoprecipitation and co-localization assays. Furthermore, we identified the interactional region of hABCF3 to be the first 200 amino acids uncharacterized region. Notably, the truncated version of hABCF3, which lacks the TPD52L2 binding region, remarkably impaired hABCF3-mediated cell proliferation. Taken together, these findings suggest that hABCF3 positively regulates cell proliferation, at least partially through the interaction with a tumor protein D52 protein family member: TPD52L2.
journal_name
Mol Biol Repjournal_title
Molecular biology reportsauthors
Zhou J,Lin Y,Shi H,Huo K,Li Ydoi
10.1007/s11033-013-2679-zsubject
Has Abstractpub_date
2013-10-01 00:00:00pages
5759-67issue
10eissn
0301-4851issn
1573-4978journal_volume
40pub_type
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