scholarly journals The Last RNA-Binding Repeat of the Escherichia coliRibosomal Protein S1 Is Specifically Involved in Autogenous Control

2000 ◽  
Vol 182 (20) ◽  
pp. 5872-5879 ◽  
Author(s):  
Irina V. Boni ◽  
Valentina S. Artamonova ◽  
Marc Dreyfus
Keyword(s):  
Translation Initiation ◽  
Rna Binding ◽  
Binding Domain ◽  
Start Codon ◽  
Upstream Sequence ◽  
Wild Type ◽  
Gene Encoding ◽  
Autogenous Control ◽  
Extragenic Suppressor ◽  
Rna Binding Domain

ABSTRACT The ssyF29 mutation, originally selected as an extragenic suppressor of a protein export defect, has been mapped within the rpsA gene encoding ribosomal protein S1. Here, we examine the nature of this mutation and its effect on translation. Sequencing of the rpsA gene from the ssyFmutant has revealed that, due to an IS10R insertion, its product lacks the last 92 residues of the wild-type S1 protein corresponding to one of the four homologous repeats of the RNA-binding domain. To investigate how this truncation affects translation, we have created two series of Escherichia coli strains (rpsA + and ssyF) bearing various translation initiation regions (TIRs) fused to the chromosomallacZ gene. Using a β-galactosidase assay, we show that none of these TIRs differ in activity between ssyF andrpsA + cells, except for the rpsATIR: the latter is stimulated threefold in ssyF cells, provided it retains at least ca. 90 nucleotides upstream of the start codon. Similarly, the activity of this TIR can be severely repressed in trans by excess S1, again provided it retains the same minimal upstream sequence. Thus, the ssyFstimulation requires the presence of the rpsA translational autogenous operator. As an interpretation, we propose that thessyF mutation relieves the residual repression caused by normal supply of S1 (i.e., that it impairs autogenous control). Thus, the C-terminal repeat of the S1 RNA-binding domain appears to be required for autoregulation, but not for overall mRNA recognition.

Mutations in the yeast RNA14 and RNA15 genes result in an abnormal mRNA decay rate; sequence analysis reveals an RNA-binding domain in the RNA15 protein

1991 ◽  
Vol 11 (6) ◽  
pp. 3075-3087
Author(s):  
L Minvielle-Sebastia ◽  
B Winsor ◽  
N Bonneaud ◽  
F Lacroute
Keyword(s):  
Molecular Weight ◽  
Sequence Analysis ◽  
Decay Rate ◽  
Rna Binding ◽  
Binding Domain ◽  
Temperature Sensitive ◽  
Multicopy Plasmid ◽  
Wild Type ◽  
Rna Binding Domain ◽  
Temperature Sensitive Phenotype

In Saccharomyces cerevisiae, temperature-sensitive mutations in the genes RNA14 and RNA15 correlate with a reduction of mRNA stability and poly(A) tail length. Although mRNA transcription is not abolished in these mutants, the transcripts are rapidly deadenylated as in a strain carrying an RNA polymerase B(II) temperature-sensitive mutation. This suggests that the primary defect could be in the control of the poly(A) status of the mRNAs and that the fast decay rate may be due to the loss of this control. By complementation of their temperature-sensitive phenotype, we have cloned the wild-type genes. They are essential for cell viability and are unique in the haploid genome. The RNA14 gene, located on chromosome H, is transcribed as three mRNAs, one major and two minor, which are 2.2, 1.5, and 1.1 kb in length. The RNA15 gene gives rise to a single 1.2-kb transcript and maps to chromosome XVI. Sequence analysis indicates that RNA14 encodes a 636-amino-acid protein with a calculated molecular weight of 75,295. No homology was found between RNA14 and RNA15 or between RNA14 and other proteins contained in data banks. The RNA15 DNA sequence predicts a protein of 296 amino acids with a molecular weight of 32,770. Sequence comparison reveals an N-terminal putative RNA-binding domain in the RNA15-encoded protein, followed by a glutamine and asparagine stretch similar to the opa sequences. Both RNA14 and RNA15 wild-type genes, when cloned on a multicopy plasmid, are able to suppress the temperature-sensitive phenotype of strains bearing either the rna14 or the rna15 mutation, suggesting that the encoded proteins could interact with each other.

scholarly journals Identification of the gene encoding a type 1 RNase H with an N-terminal double-stranded RNA binding domain from a psychrotrophic bacterium

FEBS Journal ◽  
2007 ◽  
Vol 274 (14) ◽  
pp. 3715-3727 ◽  
Author(s):  
Takashi Tadokoro ◽  
Hyongi Chon ◽  
Yuichi Koga ◽  
Kazufumi Takano ◽  
Shigenori Kanaya
Keyword(s):  
Rna Binding ◽  
Rnase H ◽  
Binding Domain ◽  
Gene Encoding ◽  
Double Stranded Rna ◽  
Psychrotrophic Bacterium ◽  
Rna Binding Domain

scholarly journals Mutations in the yeast RNA14 and RNA15 genes result in an abnormal mRNA decay rate; sequence analysis reveals an RNA-binding domain in the RNA15 protein.

1991 ◽  
Vol 11 (6) ◽  
pp. 3075-3087 ◽  
Author(s):  
L Minvielle-Sebastia ◽  
B Winsor ◽  
N Bonneaud ◽  
F Lacroute
Keyword(s):  
Molecular Weight ◽  
Sequence Analysis ◽  
Decay Rate ◽  
Rna Binding ◽  
Binding Domain ◽  
Temperature Sensitive ◽  
Multicopy Plasmid ◽  
Wild Type ◽  
Rna Binding Domain ◽  
Temperature Sensitive Phenotype

In Saccharomyces cerevisiae, temperature-sensitive mutations in the genes RNA14 and RNA15 correlate with a reduction of mRNA stability and poly(A) tail length. Although mRNA transcription is not abolished in these mutants, the transcripts are rapidly deadenylated as in a strain carrying an RNA polymerase B(II) temperature-sensitive mutation. This suggests that the primary defect could be in the control of the poly(A) status of the mRNAs and that the fast decay rate may be due to the loss of this control. By complementation of their temperature-sensitive phenotype, we have cloned the wild-type genes. They are essential for cell viability and are unique in the haploid genome. The RNA14 gene, located on chromosome H, is transcribed as three mRNAs, one major and two minor, which are 2.2, 1.5, and 1.1 kb in length. The RNA15 gene gives rise to a single 1.2-kb transcript and maps to chromosome XVI. Sequence analysis indicates that RNA14 encodes a 636-amino-acid protein with a calculated molecular weight of 75,295. No homology was found between RNA14 and RNA15 or between RNA14 and other proteins contained in data banks. The RNA15 DNA sequence predicts a protein of 296 amino acids with a molecular weight of 32,770. Sequence comparison reveals an N-terminal putative RNA-binding domain in the RNA15-encoded protein, followed by a glutamine and asparagine stretch similar to the opa sequences. Both RNA14 and RNA15 wild-type genes, when cloned on a multicopy plasmid, are able to suppress the temperature-sensitive phenotype of strains bearing either the rna14 or the rna15 mutation, suggesting that the encoded proteins could interact with each other.

scholarly journals Immunogenicity and Protection Efficacy of Replication-Deficient Influenza A Viruses with Altered NS1 Genes

2004 ◽  
Vol 78 (23) ◽  
pp. 13037-13045 ◽  
Author(s):  
Boris Ferko ◽  
Jana Stasakova ◽  
Julia Romanova ◽  
Christian Kittel ◽  
Sabine Sereinig ◽  
...  
Keyword(s):  
Influenza A ◽  
Rna Binding ◽  
T Cell Response ◽  
Binding Domain ◽  
Wild Type Virus ◽  
Type Virus ◽  
Ns1 Protein ◽  
Wild Type ◽  
Influenza A Viruses ◽  
Rna Binding Domain

ABSTRACT We explored the immunogenic properties of influenza A viruses with altered NS1 genes (NS1 mutant viruses). NS1 mutant viruses expressing NS1 proteins with an impaired RNA-binding function or insertion of a longer foreign sequence did not replicate in murine lungs but still were capable of inducing a Th1-type immune response resulting in significant titers of virus-specific serum and mucosal immunoglobulin G2 (IgG2) and IgA, but with lower titers of IgG1. In contrast, replicating viruses elicited high titers of serum and mucosal IgG1 but less serum IgA. Replication-deficient NS1 mutant viruses induced a rapid local release of proinflammatory cytokines such as interleukin-1β (IL-1β) and IL-6. Moreover, these viruses also elicited markedly higher levels of IFN-α/β in serum than the wild-type virus. Comparable numbers of virus-specific primary CD8+ T cells were determined in all of the groups of immunized mice. The most rapid onset of the recall CD8+-T-cell response upon the wild-type virus challenge was detected in mice primed with NS1 mutant viruses eliciting high levels of cytokines. It is noteworthy that there was one NS1 mutant virus encoding NS1 protein with a deletion of 40 amino acids predominantly in the RNA-binding domain that induced the highest levels of IFN-α/β, IL-6 and IL-1β after infection. Mice that were immunized with this virus were completely protected from the challenge infection. These findings indicate that a targeted modification of the RNA-binding domain of the NS1 protein is a valuable technique to generate replication-deficient, but immunogenic influenza virus vaccines.

scholarly journals Requirement for C-terminal Extension to the RNA Binding Domain for Efficient RNA Binding by Ribosomal Protein L2

2002 ◽  
Vol 66 (3) ◽  
pp. 682-684 ◽  
Author(s):  
Takeshi HAYASHI ◽  
Maino TAHARA ◽  
Kenta IWASAKI ◽  
Yoshiaki KOUZUMA ◽  
Makoto KIMURA
Keyword(s):  
Ribosomal Protein ◽  
Rna Binding ◽  
Binding Domain ◽  
Ribosomal Protein L2 ◽  
Rna Binding Domain

K160 in the RNA‐binding domain of the orf virus virulence factor OV20.0 is critical for its functions in counteracting host antiviral defense

FEBS Letters ◽  
2021 ◽  
Author(s):  
Guan‐Ru Liao ◽  
Yeu‐Yang Tseng ◽  
Ching‐Yu Tseng ◽  
Ying‐Ping Huang ◽  
Ching‐Hsiu Tsai ◽  
...  
Keyword(s):  
Virulence Factor ◽  
Rna Binding ◽  
Binding Domain ◽  
Orf Virus ◽  
Antiviral Defense ◽  
Rna Binding Domain

scholarly journals Characterization of an RNA-binding domain in the bacteriophage phi 29 connector.

1993 ◽  
Vol 268 (27) ◽  
pp. 20198-20204
Author(s):  
L.E. Donate ◽  
J.M. Valpuesta ◽  
C Mier ◽  
F Rojo ◽  
J.L. Carrascosa
Keyword(s):  
Rna Binding ◽  
Binding Domain ◽  
Rna Binding Domain
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