+
Open data
-
Basic information
Entry | ![]() | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
Title | Complex 4 (HEAD) 30S-GE81112 (weak residual tRNA) | |||||||||
![]() | Complex 4 (HEAD) 30S-GE81112 (weak residual tRNA) full map | |||||||||
![]() |
| |||||||||
![]() | Antibiotic / initiation factor / GE81112 / 30S / RIBOSOME | |||||||||
Function / homology | ![]() transcription antitermination factor activity, RNA binding / transcription elongation factor complex / regulation of DNA-templated transcription elongation / transcription antitermination / ribosome biogenesis / ribosomal small subunit assembly / small ribosomal subunit / cytosolic small ribosomal subunit / cytoplasmic translation / tRNA binding ...transcription antitermination factor activity, RNA binding / transcription elongation factor complex / regulation of DNA-templated transcription elongation / transcription antitermination / ribosome biogenesis / ribosomal small subunit assembly / small ribosomal subunit / cytosolic small ribosomal subunit / cytoplasmic translation / tRNA binding / negative regulation of translation / rRNA binding / structural constituent of ribosome / ribosome / translation / mRNA binding / RNA binding / zinc ion binding / membrane / cytosol / cytoplasm Similarity search - Function | |||||||||
Biological species | ![]() ![]() | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 3.1 Å | |||||||||
![]() | Schedlbauer A / Han X / van Bakel W / Kaminishi T / Ochoa-Lizarralde B / Iturrioz I / Capuni R / Parry R / Zegarra R / Gil-Carton D ...Schedlbauer A / Han X / van Bakel W / Kaminishi T / Ochoa-Lizarralde B / Iturrioz I / Capuni R / Parry R / Zegarra R / Gil-Carton D / Lopez-Alonso JP / Barragan Sanz K / Brandi L / Gualerzi CO / Fucini P / Connell SR | |||||||||
Funding support | ![]()
| |||||||||
![]() | ![]() Title: A binding site for the antibiotic GE81112 in the ribosomal mRNA channel. Authors: Andreas Schedlbauer / Xu Han / Wouter van Bakel / Tatsuya Kaminishi / Borja Ochoa-Lizarralde / Idoia Iturrioz / Retina Çapuni / Ransford Parry / Ronny Zegarra / David Gil-Carton / Jorge P ...Authors: Andreas Schedlbauer / Xu Han / Wouter van Bakel / Tatsuya Kaminishi / Borja Ochoa-Lizarralde / Idoia Iturrioz / Retina Çapuni / Ransford Parry / Ronny Zegarra / David Gil-Carton / Jorge P López-Alonso / Kristina Barragan Sanz / Letizia Brandi / Claudio O Gualerzi / Paola Fucini / Sean R Connell / ![]() ![]() ![]() Abstract: The initiation phase is the rate-limiting step of protein synthesis (translation) and is finely regulated, making it an important drug target. In bacteria, initiation is guided by three initiation ...The initiation phase is the rate-limiting step of protein synthesis (translation) and is finely regulated, making it an important drug target. In bacteria, initiation is guided by three initiation factors and involves positioning the start site on the messenger RNA within the P-site on the small ribosomal subunit (30S), where it is decoded by the initiator tRNA. This process can be efficiently inhibited by GE81112, a natural hydrophilic, noncyclic, nonribosomal tetrapeptide. It is found in nature in three structural variants (A, B and B1 with molecular masses of 643-658 Da). Previous biochemical and structural characterisation of GE81112 indicates that the primary mechanism of action of this antibiotic is to (1) prevent the initiator tRNA from binding correctly to the P-site and (2) block conformational rearrangements in initiation factor IF3, resulting in an 30S pre/C state. In this study, using cryoEM, we have determined the binding site of GE81112 in initiation complexes (3.2-3.7Å) and on empty ribosomes (2.09 Å). This binding site is within the mRNA channel (E-site) but remote from the binding site of the initiation factors and initiator tRNA. This suggests that it acts allosterically to prevent the initiator tRNA from being locked into place. The binding mode is consistent with previous biochemical studies and recent work identifying the key pharmacophores of GE81112. | |||||||||
History |
|
-
Structure visualization
Supplemental images |
---|
-
Downloads & links
-EMDB archive
Map data | ![]() | 144.8 MB | ![]() | |
---|---|---|---|---|
Header (meta data) | ![]() ![]() | 34.3 KB 34.3 KB | Display Display | ![]() |
FSC (resolution estimation) | ![]() | 13.5 KB | Display | ![]() |
Images | ![]() | 96.5 KB | ||
Masks | ![]() | 216 MB | ![]() | |
Filedesc metadata | ![]() | 8.5 KB | ||
Others | ![]() ![]() ![]() ![]() | 171.1 MB 192 MB 146.1 MB 146.1 MB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Validation report
Summary document | ![]() | 820.5 KB | Display | ![]() |
---|---|---|---|---|
Full document | ![]() | 820.1 KB | Display | |
Data in XML | ![]() | 21.1 KB | Display | |
Data in CIF | ![]() | 28.1 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 9h9mMC ![]() 9h8gC ![]() 9h9hC ![]() 9h9iC ![]() 9h9jC ![]() 9h9kC ![]() 9h9lC ![]() 9h9nC M: atomic model generated by this map C: citing same article ( |
---|---|
Similar structure data | Similarity search - Function & homology ![]() |
-
Links
EMDB pages | ![]() ![]() |
---|---|
Related items in Molecule of the Month |
-
Map
File | ![]() | ||||||||||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Annotation | Complex 4 (HEAD) 30S-GE81112 (weak residual tRNA) full map | ||||||||||||||||||||||||||||||||||||
Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 1.113 Å | ||||||||||||||||||||||||||||||||||||
Density |
| ||||||||||||||||||||||||||||||||||||
Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
|
-Supplemental data
-Mask #1
File | ![]() | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Projections & Slices |
| ||||||||||||
Density Histograms |
-Additional map: Complex 4 30S-GE81112 (weak residual tRNA) consensus map...
File | emd_51969_additional_1.map | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Annotation | Complex 4 30S-GE81112 (weak residual tRNA) consensus map before multibody | ||||||||||||
Projections & Slices |
| ||||||||||||
Density Histograms |
-Additional map: Complex 4 (HEAD) 30S-GE81112 (weak residual tRNA) sharpened map
File | emd_51969_additional_2.map | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Annotation | Complex 4 (HEAD) 30S-GE81112 (weak residual tRNA) sharpened map | ||||||||||||
Projections & Slices |
| ||||||||||||
Density Histograms |
-Half map: Complex 4 (HEAD) 30S-GE81112 (weak residual tRNA) half map
File | emd_51969_half_map_1.map | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Annotation | Complex 4 (HEAD) 30S-GE81112 (weak residual tRNA) half map | ||||||||||||
Projections & Slices |
| ||||||||||||
Density Histograms |
-Half map: Complex 4 (HEAD) 30S-GE81112 (weak residual tRNA) half map
File | emd_51969_half_map_2.map | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Annotation | Complex 4 (HEAD) 30S-GE81112 (weak residual tRNA) half map | ||||||||||||
Projections & Slices |
| ||||||||||||
Density Histograms |
-
Sample components
+Entire : Complex 4 (HEAD) 30S-GE81112
+Supramolecule #1: Complex 4 (HEAD) 30S-GE81112
+Macromolecule #1: 16S RNA (1542-MER)
+Macromolecule #2: Small ribosomal subunit protein uS2
+Macromolecule #3: Small ribosomal subunit protein uS3
+Macromolecule #4: Small ribosomal subunit protein uS7
+Macromolecule #5: Small ribosomal subunit protein uS9
+Macromolecule #6: Small ribosomal subunit protein uS10
+Macromolecule #7: Small ribosomal subunit protein uS13
+Macromolecule #8: Small ribosomal subunit protein uS14
+Macromolecule #9: Small ribosomal subunit protein uS19
+Macromolecule #10: MAGNESIUM ION
+Macromolecule #11: ZINC ION
-Experimental details
-Structure determination
Method | cryo EM |
---|---|
![]() | single particle reconstruction |
Aggregation state | particle |
-
Sample preparation
Buffer | pH: 7.7 |
---|---|
Grid | Model: Quantifoil R2/2 / Pretreatment - Type: GLOW DISCHARGE |
Vitrification | Cryogen name: ETHANE |
-
Electron microscopy
Microscope | TFS KRIOS |
---|---|
Image recording | Film or detector model: FEI FALCON III (4k x 4k) / Average electron dose: 44.08 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | Illumination mode: SPOT SCAN / Imaging mode: BRIGHT FIELD / Nominal defocus max: 3.25 µm / Nominal defocus min: 0.5 µm |
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |