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|Type:||Artigo de periódico|
|Title:||Functional association of human Ki-1/57 with pre-mRNA splicing events|
|Author:||BRESSAN, Gustavo C.|
QUARESMA, Alexandre J. C.
MORAES, Eduardo C.
MANFIOLLI, Adriana O.
PASSOS, Dario O.
GOMES, Marcelo D.
|Abstract:||The cytoplasmic and nuclear protein Ki- 1 / 57 was first identified in malignant cells from Hodgkin`s lymphoma. Despite studies showing its phosphorylation, arginine methylation, and interaction with several regulatory proteins, the functional role of Ki- 1 / 57 in human cells remains to be determined. Here, we investigated the relationship of Ki- 1 / 57 with RNA functions. Through immunoprecipitation assays, we verified the association of Ki- 1 / 57 with the endogenous splicing proteins hnRNPQ and SFRS9 in HeLa cell extracts. We also found that recombinant Ki- 1 / 57 was able to bind to a poly- U RNA probe in electrophoretic mobility shift assays. In a classic splicing test, we showed that Ki- 1 / 57 can modify the splicing site selection of the adenoviral E1A minigene in a dose- dependent manner. Further confocal and. uorescence microscopy analysis revealed the localization of enhanced green. uorescent protein - Ki- 1 / 57 to nuclear bodies involved in RNA processing and or small nuclear ribonucleoprotein assembly, depending on the cellular methylation status and its N- terminal region. In summary, our findings suggest that Ki- 1 / 57 is probably involved in cellular events related to RNA functions, such as pre- mRNA splicing.|
|Editor:||WILEY-BLACKWELL PUBLISHING, INC|
|Citation:||FEBS JOURNAL, v.276, n.14, p.4194-4207, 2009|
|Appears in Collections:||IB - Artigos e Materiais de Revistas Científicas|
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