Fibrillarin binds to a 3' cis-regulatory element in pre-mRNA of uvi15+ in fission yeast.
uvi15+ is induced by various stresses including exposure to UV-light. Previously, we demonstrated that the UV-induction is mainly regulated at the post-transcriptional level through a cis-acting element in the pre-mRNA. Here we show that deletion analyses define an 18-nt element responsible for the UV-induction. RNA gel mobility shift assay showed that a specific protein(s) could form a complex with the 54-nt element but its binding ability is moderately decreased in response to UV-light. Using yeast three-hybrid screen, we isolated a homolog of fibrillarin as a protein interacting with the 54-nt element, which is a key nucleolar protein for pre-rRNA processing. We further showed that the recombinant fibrillarin specifically binds to the element in a sequence-specific manner. Thus, the data suggest that fission yeast fibrillarin might regulate uvi15+ mRNA stability via binding with the 54-nt element in the pre-mRNA, implying that fibrillarin is involved in both pre-mRNA and pre-rRNA processing.
Jang
Yeun Kyu
YK
School of Biological Sciences, College of Natural Sciences, Seoul National University, Seoul 151-742, Republic of Korea.
Kim
Minkyu
M
Dai Park
Sang
S
D001483:Base Sequence; D001665:Binding Sites; D002868:Chromosomal Proteins, Non-Histone / Q000378:metabolism*; D015966:Gene Expression Regulation, Fungal; D008969:Molecular Sequence Data; D012322:RNA Precursors / Q000737:chemistry* / Q000378:metabolism*; D012323:RNA Processing, Post-Transcriptional; D012331:RNA, Fungal / Q000032:analysis / Q000096:biosynthesis / Q000235:genetics* / Q000378:metabolism; D012333:RNA, Messenger / Q000032:analysis / Q000096:biosynthesis / Q000235:genetics*; D012335:RNA, Ribosomal / Q000378:metabolism; D016601:RNA-Binding Proteins / Q000378:metabolism; D012045:Regulatory Sequences, Nucleic Acid; D012568:Schizosaccharomyces / Q000235:genetics* / Q000378:metabolism; D014466:Ultraviolet Rays
D002868:Chromosomal Proteins, Non-Histone; D012322:RNA Precursors; D012331:RNA, Fungal; D012333:RNA, Messenger; D012335:RNA, Ribosomal; D016601:RNA-Binding Proteins; C047458:fibrillarin