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Type: Journal article
Title: A novel family of plant splicing factors with a Zn knuckle motif: examination of RNA binding and splicing activities
Author: Lopato, S.
Gattoni, R.
Fabini, G.
Stevenin, J.
Barta, A.
Citation: Plant Molecular Biology: An International Journal on Molecular Biology, Molecular Genetics and Biochemistry, 1999; 39(4):761-773
Publisher: Kluwer Academic Publ
Issue Date: 1999
ISSN: 0167-4412
Statement of
Sergiy Lopato, Renata Gattoni, Gustav Fabini, James Stevenin and Andrea Barta
Abstract: An important group of splicing factors involved in constitutive and alternative splicing contain an arginine/serine (RS)-rich domain. We have previously demonstrated the existence of such factors in plants and report now on a new family of splicing factors (termed the RSZ family) from Arabidopsis thaliana which additionally harbor a Zn knuckle motif similar to the human splicing factor 9G8. Although only around 20 kDa in size, members of this family possess a multi-domain structure. In addition to the N-terminal RNA recognition motif (RRM), a Zn finger motif of the CCHC-type is inserted in an RGG-rich region; all three motifs are known to contribute to RNA binding. The C-terminal domain has a characteristic repeated structure which is very arginine-rich and centered around an SP dipeptide. One member of this family, atRSZp22, has been shown to be a phosphoprotein with properties similar to SR proteins. Furthermore, atRSZp22 was able to complement efficiently splicing deficient mammalian S100 as well as h9G8-depleted extracts. RNA binding assays to selected RNA sequences indicate an RNA binding specificity similar to the human splicing factors 9G8 and SRp20. Taken together, these result show that atRSZp22 is a true plant splicing factor which combines structural and functional features of both h9G8 and hSRp20.
Keywords: SR proteins
RNA recognition motif (RRM)
Arg/Ser-rich domain
RGG-rich region
RNA processing
S100 splicing extract
Rights: © 1999 Kluwer Academic Publishers.
DOI: 10.1023/A:1006129615846
Appears in Collections:Agriculture, Food and Wine publications
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