Human ribosomal protein S13 regulates expression of its own gene at the splicing step by a feedback mechanism.
The expression of ribosomal protein (rp) genes is regulated at multiple levels. In yeast, two genes are autoregulated by feedback effects of the protein on pre-mRNA splicing. Here, we have investigated whether similar mechanisms occur in eukaryotes with more complicated and highly regulated splicing patterns. Comparisons of the sequences of ribosomal protein S13 gene (RPS13) among mammals and birds revealed that intron 1 is more conserved than the other introns. Transfection of HEK 293 cells with a minigene-expressing ribosomal protein S13 showed that the presence of intron 1 reduced expression by a factor of four. Ribosomal protein S13 was found to inhibit excision of intron 1 from rpS13 pre-mRNA fragment in vitro. This protein was shown to be able to specifically bind the fragment and to confer protection against ribonuclease cleavage at sequences near the 5' and 3' splice sites. The results suggest that overproduction of rpS13 in mammalian cells interferes with splicing of its own pre-mRNA by a feedback mechanism.
Malygin
Alexey A
AA
Institute for Chemical Biology and Fundamental Medicine, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, 630090, Russia.
Parakhnevitch
Natalia M
NM
Ivanov
Anton V
AV
Eperon
Ian C
IC
Karpova
Galina G
GG
D000818:Animals; D001483:Base Sequence; D001665:Binding Sites; D002460:Cell Line; D002645:Chickens / Q000235:genetics; D017124:Conserved Sequence; D015536:Down-Regulation; D006706:Homeostasis; D006801:Humans; D007438:Introns; D051379:Mice; D012322:RNA Precursors / Q000378:metabolism; D022821:RNA Splice Sites; D012326:RNA Splicing; D012333:RNA, Messenger / Q000378:metabolism; D051381:Rats; D012269:Ribosomal Proteins / Q000235:genetics* / Q000378:metabolism
D012322:RNA Precursors; D022821:RNA Splice Sites; D012333:RNA, Messenger; C047013:RPS13 protein, human; D012269:Ribosomal Proteins