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Drosophila dSAP18 is a nuclear protein that associates with chromosomes and the nuclear matrix, and interacts with pinin, a protein factor involved in RNA splicing

AuthorsCosta, Elisabet; Canudas, Silvia; García Bassets, Iván; Pérez, Silvia; Fernández, Irene; Giralt, Ernest; Azorín, Ferran ; Espinàs, Maria Lluïsa
KeywordsmRNA splicing
Nuclear matrix
Issue Date12-Jul-2006
PublisherKluwer Academic Publishers
CitationChromosome Research 14(5): 515-526 (2006)
AbstractSAP18 is a highly conserved protein that was proposed to be involved in multiple cellular processes from autophagy to gene regulation and mRNA processing. In this paper we show that, in Drosophila, dSAP18 is a predominantly nuclear protein that associates to both chromosomes and the nuclear matrix. dSAP18 becomes nuclear early during development, at the onset of cellularization, and remains so all through embryo development. dSAP18 is also nuclear in salivary glands, ovaries and cultured S2 cells. Here we also show that dSAP18 forms a complex with the Drosophila homolog of pinin (dPnn), a protein factor involved in mRNA splicing. dSAP18-dPnn interaction was confirmed in vivo, through co-immunoprecipitation experiments, as well as in vitro, through GST pull-down assays. These results are discussed in the context of the possible functions played by SAP18. © Springer 2006.
Publisher version (URL)http://dx.doi.org/10.1007/s10577-006-1046-5
Identifiersdoi: 10.1007/s10577-006-1046-5
issn: 0967-3849
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