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Recombinant hnRNP protein A1 and its N-t ... us to intronexon acceptor sites
Recombinant hnRNP protein A1 and its N-terminal domain show preferential affinity for oligodeoxynucleotides homologous to intronexon acceptor sites
5161
The reported binding preference of human hnRNP protein A1 for the 3'-splice site of some introns (Swanson and Dreyfuss (1988) EMBO J. 7, 3519-3529; Mayrand and Pederson (1990) Nucleic Acids Res. 18, 3307-3318) was tested by assaying in vitro the binding of purified recombinant A1 protein (expressed in bacteria) to synthetic oligodeoxynucleotides (21-mers) of suitable sequence. In such a minimal system we find preferential binding of protein A1 to oligodeoxynucleotide sequences corresponding to the 3'-splice site of IVS1 of human beta-globin pre-mRNA and of IVS1 of Adenovirus type 2 major late transcript. Mutation studies demonstrate that the binding specificity is dependent on the known critical domains of this intron region, the AG splice site dinucleotide and polypyrimidine tract, and resides entirely in the short oligonucleotide sequence. Moreover specific binding does not require the presence of other hnRNP proteins or of snRNP particles. Studies with a truncated recombinant protein demonstrated that the minimal protein sequence determinants for A1 recognition of 3'-splice acceptor site reside entirely in the N-terminal 195 aa of the unmodified protein.
Buvoli M, Cobianchi F, Biamonti G, Riva S
Nucleic acids research
1990-11-25 00:00
18
22
6595-600
Base Sequence,Binding, Competitive,Exons,Globins,Heterogeneous-Nuclear Ribonucleoprotein Group A-B,Heterogeneous-Nuclear Ribonucleoproteins,Humans,Introns,Molecular Sequence Data,Oligodeoxyribonucleotides,RNA Precursors,RNA Splicing,Recombinant Proteins,Ribonucleoproteins,Sequence Homology, Nucleic Acid,Heterogeneous-Nuclear Ribonucleoprotein Group A-B,Heterogeneous-Nuclear Ribonucleoproteins,Oligodeoxyribonucleotides,RNA Precursors,Recombinant Proteins,Ribonucleoproteins,hnRNP A1,Globins
Istituto di Genetica Biochimica ed Evoluzionistica, Pavia, Italy.
Nucleic Acids Res.
0305-1048
0
False
2251120
