Cloning of cDNA for cathepsin B mRNA 3'-untranslated-region-binding protein (CBBP), and characterization of recombinant CBBP.
Previously, we purified the cathepsin B mRNA 3'-untranslated-region-binding protein (CBBP) from Sarcophaga and suggested its participation in the translational regulation of cathepsin B mRNA in this insect. In this study, we isolated a full length cDNA for CBBP. CBBP was an RNA-binding protein that contained four RGG boxes and four zinc finger motifs required for RNA binding. CBBP was shown to be localized in both the nuclei and cytoplasm of Sarcophaga hemocytes. Recombinant CBBP bound to the entire region of cathepsin B mRNA and repressed its translation in vitro.
Graduate School of Pharmaceutical Sciences, The University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan.
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Nishikawa
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Kobayashi
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Natori
D020413:3' Untranslated Regions / Q000235:genetics*; D020816:Amino Acid Motifs; D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D002401:Cathepsin B / Q000235:genetics*; D002460:Cell Line; D002467:Cell Nucleus / Q000378:metabolism; D003001:Cloning, Molecular; D003593:Cytoplasm / Q000378:metabolism; D018076:DNA, Complementary / Q000235:genetics; D004175:Diptera / Q000166:cytology / Q000235:genetics*; D004330:Drosophila / Q000737:chemistry; D005455:Fluorescent Antibody Technique; D005786:Gene Expression Regulation; D006434:Hemocytes / Q000166:cytology / Q000378:metabolism; D019476:Insect Proteins / Q000737:chemistry / Q000235:genetics / Q000378:metabolism; D008969:Molecular Sequence Data; D011485:Protein Binding; D014176:Protein Biosynthesis; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D016601:RNA-Binding Proteins / Q000737:chemistry / Q000235:genetics* / Q000378:metabolism*; D011994:Recombinant Proteins / Q000737:chemistry / Q000378:metabolism; D017386:Sequence Homology, Amino Acid; D016335:Zinc Fingers
D020413:3' Untranslated Regions; D018076:DNA, Complementary; D019476:Insect Proteins; D012333:RNA, Messenger; D016601:RNA-Binding Proteins; D011994:Recombinant Proteins; D002401:Cathepsin B