RNA binding by Sxl proteins in vitro and in vivo

Mark E. Samuels, Daniel Bopp, Richard A. Colvin, Robert F. Roscigno, Mariano Garcia-Blanco, Paul Schedl

Research output: Contribution to journalArticle

85 Citations (Scopus)

Abstract

Sxl has been proposed to regulate splicing of specific target genes by directly interacting with their pre-mRNAs. We have therefore examined the RNA-binding properties of Sxl protein in vitro and in vivo. Gel shift and UV cross-linking assays with a purified recombinant MBP-Sxl fusion protein demonstrated preferential binding to RNAs containing poly(U) tracts, and the protein footprinted over the poly(U) region. The protein did not appear to recognize either branch point or AG dinucleotide sequences, but an adenosine residue at the 5' end of the poly(U) tract enhanced binding severalfold. MBP- Sxl formed two shifted complexes on a tra regulated acceptor site RNA; the doubly shifted form may have been stabilized by protein-protein interactions. Consistent with its proposed role in pre-mRNA processing, in nuclear extracts Sxl was found in large ribonucleoprotein (RNP) complexes which sedimented significantly faster than bulk heterogeneous nuclear RNP and small nuclear RNPs. Anti-Sxl staining of polytene chromosomes showed Sxl protein at a number of chromosomal locations, among which was the Sxl locus itself. Sxl protein could also be targeted to a new chromosomal site carrying a transgene containing splicing regulatory sequences from the Sxl gene, following transcriptional induction. After prolonged heat shock, all Sxl protein was restricted to the heat-induced puff at the hs93D locus. In contrast, a presumptive small nuclear RNP protein was observed at several heat shock puffs following shock.

Original languageEnglish (US)
Pages (from-to)4975-4990
Number of pages16
JournalMolecular and Cellular Biology
Volume14
Issue number7
StatePublished - Jul 1994
Externally publishedYes

Fingerprint

RNA-Binding Proteins
Poly U
Proteins
Small Nuclear Ribonucleoproteins
Shock
Hot Temperature
RNA Precursors
RNA
Heterogeneous-Nuclear Ribonucleoproteins
Polytene Chromosomes
In Vitro Techniques
Ribonucleoproteins
Nuclear Proteins
Transgenes
Adenosine
Genes
Gels
Staining and Labeling

ASJC Scopus subject areas

  • Molecular Biology
  • Genetics
  • Cell Biology

Cite this

Samuels, M. E., Bopp, D., Colvin, R. A., Roscigno, R. F., Garcia-Blanco, M., & Schedl, P. (1994). RNA binding by Sxl proteins in vitro and in vivo. Molecular and Cellular Biology, 14(7), 4975-4990.

RNA binding by Sxl proteins in vitro and in vivo. / Samuels, Mark E.; Bopp, Daniel; Colvin, Richard A.; Roscigno, Robert F.; Garcia-Blanco, Mariano; Schedl, Paul.

In: Molecular and Cellular Biology, Vol. 14, No. 7, 07.1994, p. 4975-4990.

Research output: Contribution to journalArticle

Samuels, ME, Bopp, D, Colvin, RA, Roscigno, RF, Garcia-Blanco, M & Schedl, P 1994, 'RNA binding by Sxl proteins in vitro and in vivo', Molecular and Cellular Biology, vol. 14, no. 7, pp. 4975-4990.
Samuels ME, Bopp D, Colvin RA, Roscigno RF, Garcia-Blanco M, Schedl P. RNA binding by Sxl proteins in vitro and in vivo. Molecular and Cellular Biology. 1994 Jul;14(7):4975-4990.
Samuels, Mark E. ; Bopp, Daniel ; Colvin, Richard A. ; Roscigno, Robert F. ; Garcia-Blanco, Mariano ; Schedl, Paul. / RNA binding by Sxl proteins in vitro and in vivo. In: Molecular and Cellular Biology. 1994 ; Vol. 14, No. 7. pp. 4975-4990.
@article{bcc68134e59d415aaba391b3cbfc3ba0,
title = "RNA binding by Sxl proteins in vitro and in vivo",
abstract = "Sxl has been proposed to regulate splicing of specific target genes by directly interacting with their pre-mRNAs. We have therefore examined the RNA-binding properties of Sxl protein in vitro and in vivo. Gel shift and UV cross-linking assays with a purified recombinant MBP-Sxl fusion protein demonstrated preferential binding to RNAs containing poly(U) tracts, and the protein footprinted over the poly(U) region. The protein did not appear to recognize either branch point or AG dinucleotide sequences, but an adenosine residue at the 5' end of the poly(U) tract enhanced binding severalfold. MBP- Sxl formed two shifted complexes on a tra regulated acceptor site RNA; the doubly shifted form may have been stabilized by protein-protein interactions. Consistent with its proposed role in pre-mRNA processing, in nuclear extracts Sxl was found in large ribonucleoprotein (RNP) complexes which sedimented significantly faster than bulk heterogeneous nuclear RNP and small nuclear RNPs. Anti-Sxl staining of polytene chromosomes showed Sxl protein at a number of chromosomal locations, among which was the Sxl locus itself. Sxl protein could also be targeted to a new chromosomal site carrying a transgene containing splicing regulatory sequences from the Sxl gene, following transcriptional induction. After prolonged heat shock, all Sxl protein was restricted to the heat-induced puff at the hs93D locus. In contrast, a presumptive small nuclear RNP protein was observed at several heat shock puffs following shock.",
author = "Samuels, {Mark E.} and Daniel Bopp and Colvin, {Richard A.} and Roscigno, {Robert F.} and Mariano Garcia-Blanco and Paul Schedl",
year = "1994",
month = "7",
language = "English (US)",
volume = "14",
pages = "4975--4990",
journal = "Molecular and Cellular Biology",
issn = "0270-7306",
publisher = "American Society for Microbiology",
number = "7",

}

TY - JOUR

T1 - RNA binding by Sxl proteins in vitro and in vivo

AU - Samuels, Mark E.

AU - Bopp, Daniel

AU - Colvin, Richard A.

AU - Roscigno, Robert F.

AU - Garcia-Blanco, Mariano

AU - Schedl, Paul

PY - 1994/7

Y1 - 1994/7

N2 - Sxl has been proposed to regulate splicing of specific target genes by directly interacting with their pre-mRNAs. We have therefore examined the RNA-binding properties of Sxl protein in vitro and in vivo. Gel shift and UV cross-linking assays with a purified recombinant MBP-Sxl fusion protein demonstrated preferential binding to RNAs containing poly(U) tracts, and the protein footprinted over the poly(U) region. The protein did not appear to recognize either branch point or AG dinucleotide sequences, but an adenosine residue at the 5' end of the poly(U) tract enhanced binding severalfold. MBP- Sxl formed two shifted complexes on a tra regulated acceptor site RNA; the doubly shifted form may have been stabilized by protein-protein interactions. Consistent with its proposed role in pre-mRNA processing, in nuclear extracts Sxl was found in large ribonucleoprotein (RNP) complexes which sedimented significantly faster than bulk heterogeneous nuclear RNP and small nuclear RNPs. Anti-Sxl staining of polytene chromosomes showed Sxl protein at a number of chromosomal locations, among which was the Sxl locus itself. Sxl protein could also be targeted to a new chromosomal site carrying a transgene containing splicing regulatory sequences from the Sxl gene, following transcriptional induction. After prolonged heat shock, all Sxl protein was restricted to the heat-induced puff at the hs93D locus. In contrast, a presumptive small nuclear RNP protein was observed at several heat shock puffs following shock.

AB - Sxl has been proposed to regulate splicing of specific target genes by directly interacting with their pre-mRNAs. We have therefore examined the RNA-binding properties of Sxl protein in vitro and in vivo. Gel shift and UV cross-linking assays with a purified recombinant MBP-Sxl fusion protein demonstrated preferential binding to RNAs containing poly(U) tracts, and the protein footprinted over the poly(U) region. The protein did not appear to recognize either branch point or AG dinucleotide sequences, but an adenosine residue at the 5' end of the poly(U) tract enhanced binding severalfold. MBP- Sxl formed two shifted complexes on a tra regulated acceptor site RNA; the doubly shifted form may have been stabilized by protein-protein interactions. Consistent with its proposed role in pre-mRNA processing, in nuclear extracts Sxl was found in large ribonucleoprotein (RNP) complexes which sedimented significantly faster than bulk heterogeneous nuclear RNP and small nuclear RNPs. Anti-Sxl staining of polytene chromosomes showed Sxl protein at a number of chromosomal locations, among which was the Sxl locus itself. Sxl protein could also be targeted to a new chromosomal site carrying a transgene containing splicing regulatory sequences from the Sxl gene, following transcriptional induction. After prolonged heat shock, all Sxl protein was restricted to the heat-induced puff at the hs93D locus. In contrast, a presumptive small nuclear RNP protein was observed at several heat shock puffs following shock.

UR - http://www.scopus.com/inward/record.url?scp=0028246102&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0028246102&partnerID=8YFLogxK

M3 - Article

VL - 14

SP - 4975

EP - 4990

JO - Molecular and Cellular Biology

JF - Molecular and Cellular Biology

SN - 0270-7306

IS - 7

ER -