A nuclear pore complex protein that contains zinc finger motifs, binds DNA, and faces the nucleoplasm.
We have molecularly cloned and sequenced a cDNA for a rat liver nucleoporin with a molecular mass of 152.8 kd, termed nup153, that shares a repetitive degenerate pentapeptide motif with a subgroup of nucleoporins of yeast and vertebrates. However, its most striking feature is a novel 4-fold repeat of a Cys2-Cys2-type zinc finger motif. When expressed in E. coli, the zinc finger domain of nup153 binds DNA in a zinc-dependent fashion. Immunoelectron microscopy localized nup153 exclusively to the nucleoplasmic side of the nuclear pore complex. We suggest that nup153 recognizes a specific DNA sequence to organize the genome three-dimensionally and to gate transcribable genes to nuclear pore complexes.
Sukegawa
J
J
Howard Hughes Medical Institute, Rockefeller University, Laboratory of Cell Biology, New York, New York 10021.
Blobel
G
G
D000595:Amino Acid Sequence; D000818:Animals; D000911:Antibodies, Monoclonal; D001483:Base Sequence; D002460:Cell Line; D003001:Cloning, Molecular; D004247:DNA / Q000378:metabolism*; D005455:Fluorescent Antibody Technique; D015151:Immunoblotting; D008562:Membrane Glycoproteins / Q000737:chemistry / Q000235:genetics* / Q000378:metabolism; D016253:Microscopy, Immunoelectron; D008969:Molecular Sequence Data; D028861:Nuclear Pore Complex Proteins; D009687:Nuclear Proteins / Q000737:chemistry / Q000235:genetics* / Q000378:metabolism; D011485:Protein Binding; D051381:Rats; D017386:Sequence Homology, Amino Acid; D016335:Zinc Fingers / Q000235:genetics*
D000911:Antibodies, Monoclonal; D008562:Membrane Glycoproteins; D028861:Nuclear Pore Complex Proteins; D009687:Nuclear Proteins; C513083:Nup153 protein, rat; C049312:nuclear pore protein p62; D004247:DNA