[English] 日本語
Yorodumi
- EMDB-14385: Cryo-EM structure of an a-carboxysome RuBisCO enzyme at 2.9 A res... -

+
Open data


ID or keywords:

Loading...

-
Basic information

Entry
Database: EMDB / ID: EMD-14385
TitleCryo-EM structure of an a-carboxysome RuBisCO enzyme at 2.9 A resolution
Map dataCryo-EM map of an a-carboxysome RuBisCO enzyme at 2.9 A resolution (D4 symmetry)
Sample
  • Complex: RuBisCO
    • Protein or peptide: Ribulose bisphosphate carboxylase large chain
    • Protein or peptide: Ribulose bisphosphate carboxylase small chain
  • Ligand: MAGNESIUM ION
  • Ligand: 2-CARBOXYARABINITOL-1,5-DIPHOSPHATE
KeywordsCarboxysome / carbon fixation / cyanobacteria / PHOTOSYNTHESIS
Function / homology
Function and homology information


photorespiration / carboxysome / ribulose-bisphosphate carboxylase / ribulose-bisphosphate carboxylase activity / reductive pentose-phosphate cycle / monooxygenase activity / magnesium ion binding
Similarity search - Function
Ribulose bisphosphate carboxylase, small subunit / Ribulose bisphosphate carboxylase small subunit, domain / Ribulose bisphosphate carboxylase, small subunit superfamily / Ribulose bisphosphate carboxylase, small chain / Ribulose bisphosphate carboxylase, small chain / Ribulose bisphosphate carboxylase large subunit, type I / Ribulose bisphosphate carboxylase, large chain, active site / Ribulose bisphosphate carboxylase large chain active site. / Ribulose bisphosphate carboxylase, large subunit, ferrodoxin-like N-terminal / Ribulose bisphosphate carboxylase large chain, N-terminal domain ...Ribulose bisphosphate carboxylase, small subunit / Ribulose bisphosphate carboxylase small subunit, domain / Ribulose bisphosphate carboxylase, small subunit superfamily / Ribulose bisphosphate carboxylase, small chain / Ribulose bisphosphate carboxylase, small chain / Ribulose bisphosphate carboxylase large subunit, type I / Ribulose bisphosphate carboxylase, large chain, active site / Ribulose bisphosphate carboxylase large chain active site. / Ribulose bisphosphate carboxylase, large subunit, ferrodoxin-like N-terminal / Ribulose bisphosphate carboxylase large chain, N-terminal domain / Ribulose bisphosphate carboxylase, large subunit, C-terminal / RuBisCO / Ribulose bisphosphate carboxylase, large subunit, C-terminal domain superfamily / RuBisCO large subunit, N-terminal domain superfamily / Ribulose bisphosphate carboxylase large chain, catalytic domain
Similarity search - Domain/homology
Ribulose bisphosphate carboxylase small subunit / Ribulose bisphosphate carboxylase large chain
Similarity search - Component
Biological speciesCyanobium (bacteria)
Methodsingle particle reconstruction / cryo EM / Resolution: 2.87 Å
AuthorsMann D / Evans SL / Bergeron JRC
Funding support United Kingdom, 1 items
OrganizationGrant numberCountry
Biotechnology and Biological Sciences Research Council (BBSRC) United Kingdom
CitationJournal: Structure / Year: 2023
Title: Single-particle cryo-EM analysis of the shell architecture and internal organization of an intact α-carboxysome.
Authors: Sasha L Evans / Monsour M J Al-Hazeem / Daniel Mann / Nicolas Smetacek / Andrew J Beavil / Yaqi Sun / Taiyu Chen / Gregory F Dykes / Lu-Ning Liu / Julien R C Bergeron /
Abstract: Carboxysomes are proteinaceous bacterial microcompartments that sequester the key enzymes for carbon fixation in cyanobacteria and some proteobacteria. They consist of a virus-like icosahedral shell, ...Carboxysomes are proteinaceous bacterial microcompartments that sequester the key enzymes for carbon fixation in cyanobacteria and some proteobacteria. They consist of a virus-like icosahedral shell, encapsulating several enzymes, including ribulose 1,5-bisphosphate carboxylase/oxygenase (RuBisCO), responsible for the first step of the Calvin-Benson-Bassham cycle. Despite their significance in carbon fixation and great bioengineering potentials, the structural understanding of native carboxysomes is currently limited to low-resolution studies. Here, we report the characterization of a native α-carboxysome from a marine cyanobacterium by single-particle cryoelectron microscopy (cryo-EM). We have determined the structure of its RuBisCO enzyme, and obtained low-resolution maps of its icosahedral shell, and of its concentric interior organization. Using integrative modeling approaches, we have proposed a complete atomic model of an intact carboxysome, providing insight into its organization and assembly. This is critical for a better understanding of the carbon fixation mechanism and toward repurposing carboxysomes in synthetic biology for biotechnological applications.
History
DepositionFeb 18, 2022-
Header (metadata) releaseJan 25, 2023-
Map releaseJan 25, 2023-
UpdateOct 1, 2025-
Current statusOct 1, 2025Processing site: PDBe / Status: Released

-
Structure visualization

Supplemental images

emd_14385.png

Downloads & links

-
Map

FileDownload / File: emd_14385.map.gz / Format: CCP4 / Size: 64 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationCryo-EM map of an a-carboxysome RuBisCO enzyme at 2.9 A resolution (D4 symmetry)
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
1.11 Å/pix.
x 256 pix.
= 284.16 Å		1.11 Å/pix.
x 256 pix.
= 284.16 Å		1.11 Å/pix.
x 256 pix.
= 284.16 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 1.11 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 1.18
Minimum - Maximum-2.926928 - 5.133375
Average (Standard dev.)0.020075329 (±0.1878512)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions256256256
Spacing256256256
CellA=B=C: 284.16 Å
α=β=γ: 90.0 °

-
Supplemental data

-
Sample components

-
Entire : RuBisCO

EntireName: RuBisCO
Components
  • Complex: RuBisCO
    • Protein or peptide: Ribulose bisphosphate carboxylase large chain
    • Protein or peptide: Ribulose bisphosphate carboxylase small chain
  • Ligand: MAGNESIUM ION
  • Ligand: 2-CARBOXYARABINITOL-1,5-DIPHOSPHATE

-
Supramolecule #1: RuBisCO

SupramoleculeName: RuBisCO / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#2
Source (natural)Organism: Cyanobium (bacteria)

-
Macromolecule #1: Ribulose bisphosphate carboxylase large chain

MacromoleculeName: Ribulose bisphosphate carboxylase large chain / type: protein_or_peptide / ID: 1 / Number of copies: 8 / Enantiomer: LEVO / EC number: ribulose-bisphosphate carboxylase
Source (natural)Organism: Cyanobium (bacteria)
Molecular weightTheoretical: 52.526531 KDa
Recombinant expressionOrganism: Cyanobium (bacteria)
SequenceString: MSKKYDAGVK EYRDTYWTPD YVPLDTDLLA CFKCTGQEGV PKEEVAAAVA AESSTGTWST VWSELLVDLD FYKGRCYRIE DVPGDKEAF YAFIAYPLDL FEEGSVTNVL TSLVGNVFGF KALRHLRLED IRFPMAFIKT CPGPPNGICV ERDRMNKYGR P LLGCTIKP ...String:
MSKKYDAGVK EYRDTYWTPD YVPLDTDLLA CFKCTGQEGV PKEEVAAAVA AESSTGTWST VWSELLVDLD FYKGRCYRIE DVPGDKEAF YAFIAYPLDL FEEGSVTNVL TSLVGNVFGF KALRHLRLED IRFPMAFIKT CPGPPNGICV ERDRMNKYGR P LLGCTIKP KLGLSGKNYG RVVYECLRGG LDFTKDDENI NSQPFQRWQN RFEFVAEAVA LAQQETGEKK GHYLNCTAAT PE EMYERAE FAKELGQPII MHDYITGGFT ANTGLSKWCR KNGMLLHIHR AMHAVIDRHP KHGIHFRVLA KCLRLSGGDQ LHT GTVVGK LEGDRQTTLG FIDQLRESFI PEDRSRGNFF DQDWGSMPGV FAVASGGIHV WHMPALVAIF GDDSVLQFGG GTHG HPWGS AAGAAANRVA LEACVKARNA GREIEKESRD ILMEAAKHSP ELAIALETWK EIKFEFDTVD KLDVQ

UniProtKB: Ribulose bisphosphate carboxylase large chain

-
Macromolecule #2: Ribulose bisphosphate carboxylase small chain

MacromoleculeName: Ribulose bisphosphate carboxylase small chain / type: protein_or_peptide / ID: 2 / Number of copies: 8 / Enantiomer: LEVO / EC number: ribulose-bisphosphate carboxylase
Source (natural)Organism: Cyanobium (bacteria)
Molecular weightTheoretical: 12.967611 KDa
Recombinant expressionOrganism: Cyanobium (bacteria)
SequenceString:
MPFKSTVGDY QTVATLETFG FLPPMTQDEI YDQIAYIIAQ GWSPLIEHVH PSRSMATYWS YWKLPFFGEK DLGVIVSELE ACHRAYPDH HVRLVGYDAY TQSQGACFVV FEGR

UniProtKB: Ribulose bisphosphate carboxylase small subunit

-
Macromolecule #3: MAGNESIUM ION

MacromoleculeName: MAGNESIUM ION / type: ligand / ID: 3 / Number of copies: 8 / Formula: MG
Molecular weightTheoretical: 24.305 Da

-
Macromolecule #4: 2-CARBOXYARABINITOL-1,5-DIPHOSPHATE

MacromoleculeName: 2-CARBOXYARABINITOL-1,5-DIPHOSPHATE / type: ligand / ID: 4 / Number of copies: 8 / Formula: CAP
Molecular weightTheoretical: 356.115 Da
Chemical component information

ChemComp-CAP:
2-CARBOXYARABINITOL-1,5-DIPHOSPHATE

-
Experimental details

-
Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

-
Sample preparation

BufferpH: 8
VitrificationCryogen name: ETHANE

-
Electron microscopy

MicroscopeFEI TITAN KRIOS
Image recordingFilm or detector model: GATAN K2 SUMMIT (4k x 4k) / Average electron dose: 30.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 1.5 µm / Nominal defocus min: 0.5 µm
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

+
Image processing

CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Startup modelType of model: NONE
Final reconstructionResolution.type: BY AUTHOR / Resolution: 2.87 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 131356
Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: MAXIMUM LIKELIHOOD
FSC plot (resolution estimation)

+
About Yorodumi

-
News

-
Feb 9, 2022. New format data for meta-information of EMDB entries

New format data for meta-information of EMDB entries

  • Version 3 of the EMDB header file is now the official format.
  • The previous official version 1.9 will be removed from the archive.

Related info.:EMDB header

External links:wwPDB to switch to version 3 of the EMDB data model

-
Aug 12, 2020. Covid-19 info

Covid-19 info

URL: https://pdbj.org/emnavi/covid19.php

New page: Covid-19 featured information page in EM Navigator.

Related info.:Covid-19 info / Mar 5, 2020. Novel coronavirus structure data

+
Mar 5, 2020. Novel coronavirus structure data

Novel coronavirus structure data

Related info.:Yorodumi Speices / Aug 12, 2020. Covid-19 info

External links:COVID-19 featured content - PDBj / Molecule of the Month (242)：Coronavirus Proteases

+
Jan 31, 2019. EMDB accession codes are about to change! (news from PDBe EMDB page)

EMDB accession codes are about to change! (news from PDBe EMDB page)

  • The allocation of 4 digits for EMDB accession codes will soon come to an end. Whilst these codes will remain in use, new EMDB accession codes will include an additional digit and will expand incrementally as the available range of codes is exhausted. The current 4-digit format prefixed with “EMD-” (i.e. EMD-XXXX) will advance to a 5-digit format (i.e. EMD-XXXXX), and so on. It is currently estimated that the 4-digit codes will be depleted around Spring 2019, at which point the 5-digit format will come into force.
  • The EM Navigator/Yorodumi systems omit the EMD- prefix.

Related info.:Q: What is EMD? / ID/Accession-code notation in Yorodumi/EM Navigator

External links:EMDB Accession Codes are Changing Soon! / Contact to PDBj

+
Jul 12, 2017. Major update of PDB

Major update of PDB

  • wwPDB released updated PDB data conforming to the new PDBx/mmCIF dictionary.
  • This is a major update changing the version number from 4 to 5, and with Remediation, in which all the entries are updated.
  • In this update, many items about electron microscopy experimental information are reorganized (e.g. em_software).
  • Now, EM Navigator and Yorodumi are based on the updated data.

External links:wwPDB Remediation / Enriched Model Files Conforming to OneDep Data Standards Now Available in the PDB FTP Archive

-
Yorodumi

Thousand views of thousand structures

  • Yorodumi is a browser for structure data from EMDB, PDB, SASBDB, etc.
  • This page is also the successor to EM Navigator detail page, and also detail information page/front-end page for Omokage search.
  • The word "yorodu" (or yorozu) is an old Japanese word meaning "ten thousand". "mi" (miru) is to see.

Related info.:EMDB / PDB / SASBDB / Comparison of 3 databanks / Yorodumi Search / Aug 31, 2016. New EM Navigator & Yorodumi / Yorodumi Papers / Jmol/JSmol / Function and homology information / Changes in new EM Navigator and Yorodumi

Read more