Localisation of human papillomavirus 16 E7 oncoprotein changes with cell confluence

Joanna Laurson*, Kenneth Raj

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

E7 is one of the best studied proteins of human papillomavirus type 16, largely because of its oncogenic potential linked to cervical cancer. Yet the sub-cellular location of E7 remains confounding, even though it has been shown to be able to shuttle between the nucleus and the cytoplasm. Here we show with immunocytochemistry that E7 proteins are located in the nucleus and cytoplasm in sub-confluent cells, but becomes cytoplasmic in confluent cells. The change in E7's location is independent of time in culture, cell division, cell cycle phase or cellular differentiation. Levels of E7 are also increased in confluent cells as determined by Western blotting. Our investigations have also uncovered how different analytical techniques influence the observation of where E7 is localised, highlighting the importance of technical choice in such analysis. Understanding the localisation of E7 will help us to better comprehend the function of E7 on its target proteins.

Original languageEnglish
Article numbere21501
JournalPLoS ONE
Volume6
Issue number6
DOIs
Publication statusPublished - 2011

Fingerprint

Dive into the research topics of 'Localisation of human papillomavirus 16 E7 oncoprotein changes with cell confluence'. Together they form a unique fingerprint.

Cite this