negative regulation of translational initiation / mRNA regulatory element binding translation repressor activity / transcription antitermination / DNA-templated transcription termination / maintenance of translational fidelity / mRNA 5'-UTR binding / ribosomal small subunit biogenesis / ribosomal small subunit assembly / small ribosomal subunit / cytosolic small ribosomal subunit ...negative regulation of translational initiation / mRNA regulatory element binding translation repressor activity / transcription antitermination / DNA-templated transcription termination / maintenance of translational fidelity / mRNA 5'-UTR binding / ribosomal small subunit biogenesis / ribosomal small subunit assembly / small ribosomal subunit / cytosolic small ribosomal subunit / small ribosomal subunit rRNA binding / cytoplasmic translation / tRNA binding / negative regulation of translation / rRNA binding / ribosome / structural constituent of ribosome / translation / ribonucleoprotein complex / response to antibiotic / mRNA binding / RNA binding / membrane / cytosol / cytoplasm Similarity search - Function
Ribosomal protein S21, conserved site / Ribosomal protein S21 signature. / Ribosomal protein S14, bacterial/plastid / Ribosomal protein S21 superfamily / Ribosomal protein S16, conserved site / Ribosomal protein S16 signature. / Ribosomal protein S21 / Ribosomal protein S21 / Ribosomal protein S19, bacterial-type / Ribosomal protein S3, bacterial-type ...Ribosomal protein S21, conserved site / Ribosomal protein S21 signature. / Ribosomal protein S14, bacterial/plastid / Ribosomal protein S21 superfamily / Ribosomal protein S16, conserved site / Ribosomal protein S16 signature. / Ribosomal protein S21 / Ribosomal protein S21 / Ribosomal protein S19, bacterial-type / Ribosomal protein S3, bacterial-type / Ribosomal protein S13, bacterial-type / Ribosomal protein S6, conserved site / Ribosomal protein S6 signature. / Ribosomal protein S7, bacterial/organellar-type / Ribosomal protein S9, bacterial/plastid / Ribosomal protein S11, bacterial-type / Ribosomal protein S20 / Ribosomal protein S20 superfamily / Ribosomal protein S20 / Ribosomal protein S4, bacterial-type / 30S ribosomal protein S17 / Ribosomal protein S5, bacterial-type / Ribosomal protein S2, bacteria/mitochondria/plastid / Ribosomal protein S18, conserved site / Ribosomal protein S18 signature. / Ribosomal protein S6, plastid/chloroplast / Ribosomal protein S16 / Ribosomal protein S16 domain superfamily / Ribosomal protein S16 / Ribosomal protein S15, bacterial-type / Ribosomal protein S12, bacterial-type / Ribosomal protein S18 / Ribosomal protein S18 / Ribosomal protein S18 superfamily / K Homology domain / K homology RNA-binding domain / Ribosomal protein S6 / Ribosomal protein S6 / Ribosomal protein S6 superfamily / Ribosomal protein S2 signature 2. / Translation elongation factor EF1B/ribosomal protein S6 / Ribosomal protein S3, conserved site / Ribosomal protein S3 signature. / Ribosomal protein S10, conserved site / Ribosomal protein S10 signature. / Ribosomal protein S14, conserved site / Ribosomal protein S14 signature. / Ribosomal protein S2 signature 1. / KH domain / Type-2 KH domain profile. / K Homology domain, type 2 / Ribosomal protein S3, C-terminal / Ribosomal protein S3, C-terminal domain / Ribosomal protein S3, C-terminal domain superfamily / Ribosomal protein S15/S19, conserved site / Ribosomal protein S19 signature. / Ribosomal protein S10 / Ribosomal protein S19/S15 / Ribosomal protein S19/S15, superfamily / Ribosomal protein S19 / : / Ribosomal protein S5, N-terminal, conserved site / Ribosomal protein S5 signature. / Ribosomal protein S7, conserved site / Ribosomal protein S2, conserved site / Ribosomal protein S7 signature. / Ribosomal protein S2 / Ribosomal protein S2, flavodoxin-like domain superfamily / Ribosomal protein S2 / Ribosomal protein S17, conserved site / Ribosomal protein S17 signature. / K homology domain superfamily, prokaryotic type / Ribosomal protein S5 / Ribosomal protein S13, conserved site / Ribosomal protein S13 signature. / S5 double stranded RNA-binding domain profile. / Ribosomal protein S5, N-terminal / Ribosomal protein S13 / 30s ribosomal protein S13, C-terminal / Ribosomal protein S13/S18 / Ribosomal protein S5, C-terminal / Ribosomal protein S13 family profile. / Ribosomal protein S5, N-terminal domain / Ribosomal protein S5, C-terminal domain / Ribosomal protein S8 signature. / Ribosomal protein S4/S9 N-terminal domain / Ribosomal protein S4, conserved site / Ribosomal protein S15 signature. / Ribosomal protein S4 signature. / Ribosomal protein S4/S9 N-terminal domain / Ribosomal protein S4/S9, N-terminal / Ribosomal protein S14 / Ribosomal protein S14p/S29e / Ribosomal protein S4/S9 / K homology domain-like, alpha/beta / Ribosomal protein S8 / Ribosomal protein S8 superfamily / Ribosomal protein S8 / S4 RNA-binding domain profile. / Ribosomal protein S13-like, H2TH Similarity search - Domain/homology
Small ribosomal subunit protein bS18 / Small ribosomal subunit protein bS21 / Small ribosomal subunit protein uS12 / Small ribosomal subunit protein uS11 / Small ribosomal subunit protein uS14 / Small ribosomal subunit protein uS13 / Small ribosomal subunit protein uS3 / Small ribosomal subunit protein uS2 / Small ribosomal subunit protein uS10 / Small ribosomal subunit protein uS19 ...Small ribosomal subunit protein bS18 / Small ribosomal subunit protein bS21 / Small ribosomal subunit protein uS12 / Small ribosomal subunit protein uS11 / Small ribosomal subunit protein uS14 / Small ribosomal subunit protein uS13 / Small ribosomal subunit protein uS3 / Small ribosomal subunit protein uS2 / Small ribosomal subunit protein uS10 / Small ribosomal subunit protein uS19 / Small ribosomal subunit protein uS17 / Small ribosomal subunit protein uS8 / Small ribosomal subunit protein uS9 / Small ribosomal subunit protein uS15 / Small ribosomal subunit protein bS16 / Small ribosomal subunit protein bS20 / Small ribosomal subunit protein bS6 / Small ribosomal subunit protein uS7 / Small ribosomal subunit protein uS4 / Small ribosomal subunit protein uS5 Similarity search - Component
Biological species
Escherichia coli (E. coli)
Method
single particle reconstruction / cryo EM / Resolution: 2.56 Å
Journal: Biochemistry / Year: 2025 Title: Role of Ribosomal Protein bS1 in Orthogonal mRNA Start Codon Selection. Authors: Kristina V Boyko / Rebecca A Bernstein / Minji Kim / Jamie H D Cate / Abstract: In many bacteria, the location of the mRNA start codon is determined by a short ribosome binding site sequence that base pairs with the 3'-end of 16S rRNA (rRNA) in the 30S subunit. Many groups have ...In many bacteria, the location of the mRNA start codon is determined by a short ribosome binding site sequence that base pairs with the 3'-end of 16S rRNA (rRNA) in the 30S subunit. Many groups have changed these short sequences, termed the Shine-Dalgarno (SD) sequence in the mRNA and the anti-Shine-Dalgarno (ASD) sequence in 16S rRNA, to create "orthogonal" ribosomes to enable the synthesis of orthogonal polymers in the presence of the endogenous translation machinery. However, orthogonal ribosomes are prone to SD-independent translation. Ribosomal protein bS1, which binds to the 30S ribosomal subunit, is thought to promote translation initiation by shuttling the mRNA to the ribosome. Thus, a better understanding of how the SD and bS1 contribute to start codon selection could help efforts to improve the orthogonality of ribosomes. Here, we engineered the ribosome to prevent binding of bS1 to the 30S subunit and separate the activity of bS1 binding to the ribosome from the role of the mRNA SD sequence in start codon selection. We find that ribosomes lacking bS1 are slightly less active than wild-type ribosomes in vitro. Furthermore, orthogonal 30S subunits lacking bS1 do not have an improved orthogonality. Our findings suggest that mRNA features outside the SD sequence and independent of binding of bS1 to the ribosome likely contribute to start codon selection and the lack of orthogonality of present orthogonal ribosomes.
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Escherichia coli (E. coli)
Authors
United States, 1 items 
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emd_47169.png
http://ftp.pdbj.org/pub/emdb/structures/EMD-47169
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