A protein recognized by antibodies to Asp-Asp-Asp-Glu-Asp shows specific binding activity to heterogeneous nuclear transport signals.
Nuclear proteins contain a signal, termed the nuclear transport signal, that specifies their selective transport into the nucleus. Previously we reported that antibodies to Asp-Asp-Asp-Glu-Asp (DDDED) inhibited nuclear transport of nuclear proteins in vivo. We therefore tried to detect a cellular receptor of nuclear transport signals as a protein that reacted with both anti-DDDED antibody and nuclear transport signal sequences. Using two steps of affinity chromatography, anti-DDDED-Sepharose and nucleoplasmin-Sepharose, we obtained a protein of 69 kDa (p69) from the nuclear pore fraction that showed these characters. This p69 recognized by anti-DDDED antibody interacted specifically with SV40 large T antigen and nucleoplasmin transport signals.
Imamoto-Sonobe
N
N
Institute for Molecular and Cellular Biology, Osaka University, Japan.
Matsuoka
Y
Y
Semba
T
T
Okada
Y
Y
Uchida
T
T
Yoneda
Y
Y
D000595:Amino Acid Sequence; D000818:Animals; D000906:Antibodies; D002467:Cell Nucleus / Q000378:metabolism; D002846:Chromatography, Affinity; D008099:Liver / Q000378:metabolism; D008969:Molecular Sequence Data; D008970:Molecular Weight; D009687:Nuclear Proteins / Q000235:genetics* / Q000302:isolation & purification / Q000378:metabolism; D056489:Nucleoplasmins; D010750:Phosphoproteins; D011499:Protein Processing, Post-Translational; D021382:Protein Sorting Signals / Q000235:genetics* / Q000302:isolation & purification; D051381:Rats
D000906:Antibodies; D009687:Nuclear Proteins; D056489:Nucleoplasmins; D010750:Phosphoproteins; D021382:Protein Sorting Signals