A sequence predicted to form a stem-loop is proposed to be required for formation of an RNA-protein complex involving the 3'UTR of beta-subunit F0F1-ATPase mRNA.
ATP-synthase assembly requires coordinated control of ATP mRNA translation; this may e.g. occur through the formation of mRNA-protein complexes. In this study we aim to identify sequences in the 3'UTR of the beta-subunit F(1)-ATPase mRNA necessary for RNA-protein complex formation. We examined the interaction between a brain cytoplasmic protein extract and in vitro-synthesized beta-subunit 3'UTR probes containing successive accumulative 5'- and 3'-deletions, as well as single subregion deletions, with or without poly(A) tail. Using electrophoretic mobility shift assays we found that two major RNA-protein complexes (here called RPC1 and RPC2) were formed with the full-length 3'UTR. The RPC2 complex formation was fully dependent on the presence of both the poly(A) tail and one subregion directly adjacent to it. For RPC1 complex formation, a 3'UTR sequence stretch (experimentally divided into three subregions) adjacent to but not including the poly(A) tail was necessary. This sequence stretch includes a conserved 40-nucleotide region that, according to the structure prediction program mfold, is able to fold into a characteristic stem-loop structure. Since the formation of the RPC1 complex was not dependent on a conventional sequence motif in the 3'UTR of the beta-subunit mRNA but rather on the presence of the predicted stem-loop-forming region as such, we hypothetize that this RNA region, by forming a stem-loop in the 3'UTR beta-subunit mRNA, is necessary for formation of the RNA-protein complex.
The Wenner-Gren Institute, The Arrhenius Laboratories F3, Stockholm University, SE-106 91 Stockholm, Sweden.
Tatiana V
TV
Kramarova
Hana
H
Antonicka
Josef
J
Houstek
Barbara
B
Cannon
Jan
J
Nedergaard
D020413:3' Untranslated Regions / Q000235:genetics*; D000818:Animals; D001483:Base Sequence; D017931:DNA Primers; D018076:DNA, Complementary / Q000235:genetics; D008297:Male; D051379:Mice; D008815:Mice, Inbred Strains; D008958:Models, Molecular; D008969:Molecular Sequence Data; D009690:Nucleic Acid Conformation; D010957:Plasmids; D016133:Polymerase Chain Reaction; D014176:Protein Biosynthesis; D021122:Protein Subunits / Q000235:genetics / Q000378:metabolism; D006180:Proton-Translocating ATPases / Q000235:genetics* / Q000378:metabolism*; D012313:RNA / Q000235:genetics*; D012333:RNA, Messenger / Q000737:chemistry / Q000235:genetics*; D017384:Sequence Deletion; D014158:Transcription, Genetic
D020413:3' Untranslated Regions; D017931:DNA Primers; D018076:DNA, Complementary; D021122:Protein Subunits; D012333:RNA, Messenger; D012313:RNA; D006180:Proton-Translocating ATPases