University of Natural Resources and Life Sciences, Vienna (BOKU) - Research portal

Logo BOKU Resarch Portal

Selected Publication:

Lorkovic, ZJ; Hilscher, J; Barta, A.
(2008): Co-localisation studies of Arabidopsis SR splicing factors reveal different types of speckles in plant cell nuclei
EXP CELL RES. 2008; 314(17): 3175-3186. FullText FullText_BOKU

SR proteins are multidomain splicing factors which are important for spliceosome assembly and for regulation of alternative splicing. In mammalian nuclei these proteins localise to speckles from where they are recruited to transcription sites. By using fluorescent protein fusion technology and different experimental approaches it has been shown that Arabidopsis SR proteins, in addition to diffuse nucleoplasmic staining, localise into an irregular nucleoplasmic network resembling speckles in mammalian cells. As Arabidopsis SIR proteins fall into seven conserved sub-families we investigated co-localisation of members Of the different sub-families in transiently transformed tobacco protoplast. Here we demonstrate the new finding that members of different SR protein sub-families localise into distinct Populations Of unclear speckles with no, partial or complete co-localisation. This is particularly interesting as we also show that these proteins do interact in a yeast two-hybrid assay as well as in pull-down and in co-immunopreciptiation assays. Our data raise the interesting possibility that SIR proteins are partitioned into distinct Populations of nuclear speckles to allow a more specific recruitment to the tanscription/pre-mRNA processing sites of particular genes depending on cell type and developmental stage. (C) 2008 Elsevier Inc. All rights reserved.
Authors BOKU Wien:
Hilscher Julia
Find related publications in this database (using NML MeSH Indexing)
Animals -
Arabidopsis - cytology
Arabidopsis Proteins - genetics
Cell Nucleus - metabolism
Humans -
Protoplasts - cytology
RNA Splicing -
RNA-Binding Proteins - genetics
Recombinant Fusion Proteins - genetics
Ribonucleoprotein, U1 Small Nuclear - genetics
Tobacco - cytology
Two-Hybrid System Techniques -

Find related publications in this database (Keywords)
SR proteins
Nuclear compartments

© BOKU Wien Imprint