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Yorodumi- EMDB-3700: Structure of Rubisco from Rhodobacter sphaeroides in complex with CABP -
+Open data
-Basic information
Entry | Database: EMDB / ID: EMD-3700 | |||||||||
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Title | Structure of Rubisco from Rhodobacter sphaeroides in complex with CABP | |||||||||
Map data | ||||||||||
Sample |
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Biological species | Rhodobacter sphaeroides (bacteria) | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 3.5 Å | |||||||||
Authors | Bracher A / Milicic G / Ciniawsky S / Wendler P / Hayer-Hartl M / Hart FU | |||||||||
Citation | Journal: Mol Cell / Year: 2017 Title: Mechanism of Enzyme Repair by the AAA Chaperone Rubisco Activase. Authors: Javaid Y Bhat / Goran Miličić / Gabriel Thieulin-Pardo / Andreas Bracher / Andrew Maxwell / Susanne Ciniawsky / Oliver Mueller-Cajar / John R Engen / F Ulrich Hartl / Petra Wendler / Manajit Hayer-Hartl / Abstract: How AAA+ chaperones conformationally remodel specific target proteins in an ATP-dependent manner is not well understood. Here, we investigated the mechanism of the AAA+ protein Rubisco activase (Rca) ...How AAA+ chaperones conformationally remodel specific target proteins in an ATP-dependent manner is not well understood. Here, we investigated the mechanism of the AAA+ protein Rubisco activase (Rca) in metabolic repair of the photosynthetic enzyme Rubisco, a complex of eight large (RbcL) and eight small (RbcS) subunits containing eight catalytic sites. Rubisco is prone to inhibition by tight-binding sugar phosphates, whose removal is catalyzed by Rca. We engineered a stable Rca hexamer ring and analyzed its functional interaction with Rubisco. Hydrogen/deuterium exchange and chemical crosslinking showed that Rca structurally destabilizes elements of the Rubisco active site with remarkable selectivity. Cryo-electron microscopy revealed that Rca docks onto Rubisco over one active site at a time, positioning the C-terminal strand of RbcL, which stabilizes the catalytic center, for access to the Rca hexamer pore. The pulling force of Rca is fine-tuned to avoid global destabilization and allow for precise enzyme repair. | |||||||||
History |
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-Structure visualization
Movie |
Movie viewer |
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Structure viewer | EM map: SurfViewMolmilJmol/JSmol |
Supplemental images |
-Downloads & links
-EMDB archive
Map data | emd_3700.map.gz | 10.8 MB | EMDB map data format | |
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Header (meta data) | emd-3700-v30.xml emd-3700.xml | 14.3 KB 14.3 KB | Display Display | EMDB header |
Images | emd_3700.png | 58.8 KB | ||
Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-3700 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-3700 | HTTPS FTP |
-Validation report
Summary document | emd_3700_validation.pdf.gz | 245.8 KB | Display | EMDB validaton report |
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Full document | emd_3700_full_validation.pdf.gz | 244.9 KB | Display | |
Data in XML | emd_3700_validation.xml.gz | 6.8 KB | Display | |
Arichive directory | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-3700 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-3700 | HTTPS FTP |
-Related structure data
-Links
EMDB pages | EMDB (EBI/PDBe) / EMDataResource |
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Related items in Molecule of the Month |
-Map
File | Download / File: emd_3700.map.gz / Format: CCP4 / Size: 125 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Voxel size | X=Y=Z: 1.04 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
CCP4 map header:
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-Supplemental data
-Sample components
-Entire : Rubisco
Entire | Name: Rubisco |
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Components |
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-Supramolecule #1: Rubisco
Supramolecule | Name: Rubisco / type: complex / ID: 1 / Parent: 0 / Macromolecule list: all / Details: Rubisco was treated with the inhibitor CABP |
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Source (natural) | Organism: Rhodobacter sphaeroides (bacteria) |
Recombinant expression | Organism: Escherichia coli (E. coli) / Recombinant strain: BL21(DE3) |
-Macromolecule #1: RbcL
Macromolecule | Name: RbcL / type: protein_or_peptide / ID: 1 / Enantiomer: LEVO |
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Source (natural) | Organism: Rhodobacter sphaeroides (bacteria) |
Recombinant expression | Organism: Escherichia coli (E. coli) |
Sequence | String: MDTKTTEIKG KERYKAGVLK YAQMGYWDGD YVPKDTDVLA LFRITPQEGV DPVEAAAAVA GESSTATWT VVWTDRLTAC DSYRAKAYRV EPVPGTPGQY FCYVAYDLIL FEEGSIANLT A SIIGNVFS FKPLKAARLE DMRFPVAYVK TYKGPPTGIV GERERLDKFG ...String: MDTKTTEIKG KERYKAGVLK YAQMGYWDGD YVPKDTDVLA LFRITPQEGV DPVEAAAAVA GESSTATWT VVWTDRLTAC DSYRAKAYRV EPVPGTPGQY FCYVAYDLIL FEEGSIANLT A SIIGNVFS FKPLKAARLE DMRFPVAYVK TYKGPPTGIV GERERLDKFG KPLLGATTKP KL GLSGKNY GRVVYEGLKG GLDFMKDDEN INSQPFMHWR DRFLYVMEAV NLASAQTGEV KGH YLNITA GTMEEMYRRA EFAKSLGSVI VMVDLIIGYT AIQSISEWCR QNDMILHMHR AGHG TYTRQ KNHGISFRVI AKWLRLAGVD HLHCGTAVGK LEGDPLTVQG YYNVCREPFN TVDLP RGIF FEQDWADLRK VMPVASGGIH AGQMHQLLSL FGDDVVLQFG GGTIGHPMGI QAGATA NRV ALEAMVLARN EGRNIDVEGP EILRAAAKWC KPLEAALDTW GNITFNYTST DTSDFVP TA SVAM |
-Macromolecule #3: RbcS
Macromolecule | Name: RbcS / type: protein_or_peptide / ID: 3 / Enantiomer: LEVO |
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Source (natural) | Organism: Rhodobacter sphaeroides (bacteria) |
Recombinant expression | Organism: Escherichia coli (E. coli) |
Sequence | String: MRITQGCFSF LPDLTDEQIS AQVDYCLGRG WAVSLEHTDD PHPRNTYWEM WGMPMFDLRD PKGVMIELDE CRKAWPGRYI RINAFDSTRG FETVTMSFIV NRPEVEPSLR MERTEVDGRS IRYTHSIVR |
-Experimental details
-Structure determination
Method | cryo EM |
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Processing | single particle reconstruction |
Aggregation state | particle |
-Sample preparation
Concentration | 0.3 mg/mL | ||||||||||||||||||
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Buffer | pH: 8 Component:
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Grid | Model: Quantifoil R2/2 / Material: COPPER / Support film - Material: CARBON / Support film - Film thickness: 2.0 nm / Pretreatment - Type: GLOW DISCHARGE | ||||||||||||||||||
Vitrification | Cryogen name: ETHANE / Instrument: FEI VITROBOT MARK IV | ||||||||||||||||||
Details | RcaCC hexamers (20 micromolar monomer) were mixed with E.C.M-CABP octamers (10 micromolar monomer) in a reaction containing 20 mM HEPES pH 7.5, 50 mM NaCl, 10 mM MgCl2, 10 mM ATP and 1mM RuBP, for 1 min at 25oC prior to addition of 0.125 % of glutaraldehyde (GA). After 10 min the reaction was quenched by addition of 0.1M Tris HCl pH 8 followed by gel filtration on a Superdex 200 PC 3.2/30 column (GE Healthcare).The fractions were eluted in buffer A and analyzed on a 6 % native gel. Fraction 13 containing HMW complexes with the least amount of free Rubisco were chosen for cryo-EM. The crosslinked E.C.M.-CABP-RcaCC complexes were diluted to 0.0030-0.0035 g ml-1 in 20 mM Tris-HCl pH 8.0, 50 mM NaCl, 1 mM ATP, 1 mM ATP-gammaS and 1 mM RuBP |
-Electron microscopy
Microscope | FEI TITAN KRIOS |
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Details | Cs corrected Krios 1 at NeCEN (June 2016) |
Image recording | Film or detector model: FEI FALCON II (4k x 4k) / Average exposure time: 1.25 sec. / Average electron dose: 50.0 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD |
Experimental equipment | Model: Titan Krios / Image courtesy: FEI Company |
+Image processing
-Atomic model buiding 1
Refinement | Space: RECIPROCAL / Protocol: OTHER / Target criteria: Maximum likelihood |
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