[English] 日本語
Yorodumi
- EMDB-26672: Rhoptry secretory apparatus of Plasmodium falciparum with an asso... -

+
Open data


ID or keywords:

Loading...

-
Basic information

Entry
Database: EMDB / ID: EMD-26672
TitleRhoptry secretory apparatus of Plasmodium falciparum with an associated rhoptry tip from a fused rhoptry pair
Map dataRhoptry secretory apparatus of Plasmodium falciparum with an associated rhoptry tip from a fused rhoptry pair
Sample
  • Cell: Plasmodium falciparum merozoite
    • Complex: Rhoptry secretory apparatus
    • Organelle or cellular component: Rhoptry
KeywordsExocytosis Membrane Parasite / CELL INVASION
Biological speciesPlasmodium falciparum 3D7 (eukaryote)
Methodsubtomogram averaging / cryo EM / Resolution: 50.0 Å
AuthorsMartinez M / Chang Y-W
Funding support United States, 1 items
OrganizationGrant numberCountry
David and Lucile Packard Foundation United States
CitationJournal: Nat Microbiol / Year: 2022
Title: Rhoptry secretion system structure and priming in Plasmodium falciparum revealed using in situ cryo-electron tomography.
Authors: Matthew Martinez / William David Chen / Marta Mendonça Cova / Petra Molnár / Shrawan Kumar Mageswaran / Amandine Guérin / Audrey R Odom John / Maryse Lebrun / Yi-Wei Chang /
Abstract: Apicomplexan parasites secrete contents of the rhoptries, club-shaped organelles in the apical region, into host cells to permit their invasion and establishment of infection. The rhoptry secretory ...Apicomplexan parasites secrete contents of the rhoptries, club-shaped organelles in the apical region, into host cells to permit their invasion and establishment of infection. The rhoptry secretory apparatus (RSA), which is critical for rhoptry secretion, was recently discovered in Toxoplasma and Cryptosporidium. It is unknown whether a similar molecular machinery exists in the malaria parasite Plasmodium. In this study, we use in situ cryo-electron tomography to investigate the rhoptry secretion system in P. falciparum merozoites. We identify the presence of an RSA at the cell apex and a morphologically distinct apical vesicle docking the tips of the two rhoptries to the RSA. We also discover two additional rhoptry organizations that lack the apical vesicle. Using subtomogram averaging, we reveal different conformations of the RSA structure corresponding to different rhoptry organizations. Our results highlight previously unknown steps in the process of rhoptry secretion and indicate a regulatory role for the conserved apical vesicle in host invasion by apicomplexan parasites.
History
DepositionApr 15, 2022-
Header (metadata) releaseMay 4, 2022-
Map releaseMay 4, 2022-
UpdateJan 17, 2024-
Current statusJan 17, 2024Processing site: RCSB / Status: Released

-
Structure visualization

Supplemental images

Downloads & links

-
Map

FileDownload / File: emd_26672.map.gz / Format: CCP4 / Size: 2.8 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationRhoptry secretory apparatus of Plasmodium falciparum with an associated rhoptry tip from a fused rhoptry pair
Voxel sizeX=Y=Z: 10.6 Å
Density
Contour LevelBy AUTHOR: 1.0
Minimum - Maximum-11.248218 - 12.412521
Average (Standard dev.)0.0000026538114 (±1.6596062)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin-45-45-45
Dimensions909090
Spacing909090
CellA=B=C: 954.00006 Å
α=β=γ: 90.0 °

-
Supplemental data

-
Mask #1

Fileemd_26672_msk_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

-
Half map: Rhoptry secretory apparatus of Plasmodium falciparum with an...

Fileemd_26672_half_map_1.map
AnnotationRhoptry secretory apparatus of Plasmodium falciparum with an associated rhoptry tip from a fused rhoptry pair
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

-
Half map: Rhoptry secretory apparatus of Plasmodium falciparum with an...

Fileemd_26672_half_map_2.map
AnnotationRhoptry secretory apparatus of Plasmodium falciparum with an associated rhoptry tip from a fused rhoptry pair
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

-
Sample components

-
Entire : Plasmodium falciparum merozoite

EntireName: Plasmodium falciparum merozoite
Components
  • Cell: Plasmodium falciparum merozoite
    • Complex: Rhoptry secretory apparatus
    • Organelle or cellular component: Rhoptry

-
Supramolecule #1: Plasmodium falciparum merozoite

SupramoleculeName: Plasmodium falciparum merozoite / type: cell / ID: 1 / Parent: 0 / Macromolecule list: #1-#2
Source (natural)Organism: Plasmodium falciparum 3D7 (eukaryote)

-
Supramolecule #2: Rhoptry secretory apparatus

SupramoleculeName: Rhoptry secretory apparatus / type: complex / ID: 2 / Parent: 1 / Macromolecule list: #1
Details: 8-fold symmetric protein structure, anchored into the plasma membrane, which docks a fused rhoptry tip to the site of exocytosis at the plasma membrane
Source (natural)Organism: Plasmodium falciparum 3D7 (eukaryote) / Organelle: Apical complex / Location in cell: Cytoplasm

-
Supramolecule #3: Rhoptry

SupramoleculeName: Rhoptry / type: organelle_or_cellular_component / ID: 3 / Parent: 1 / Macromolecule list: #2
Details: The rhoptry tip from a fused rhoptry pair docked at the rhoptry secretory apparatus

-
Experimental details

-
Structure determination

Methodcryo EM
Processingsubtomogram averaging
Aggregation statecell

-
Sample preparation

BufferpH: 7.4
Details: RPMI medium modified with 27 mM NaHCO3, 11 mM glucose, 5 mM HEPES, 0.01 mM thymidine, 1 mM sodium pyruvate, 0.37 mM hypoxanthine, 10 ug/mL gentamicin, and 5 g/L Albumax
GridModel: Quantifoil R2/2 / Material: COPPER / Mesh: 200 / Support film - Material: CARBON / Support film - topology: HOLEY / Pretreatment - Type: GLOW DISCHARGE
VitrificationCryogen name: ETHANE-PROPANE / Chamber humidity: 95 % / Chamber temperature: 297 K / Instrument: LEICA EM GP
Details: Blot for 4 or 6 seconds from the front before plunging.
DetailsMechanically isolated merozoites from a highly synchronous culture of Plasmodium falciparum schizonts

-
Electron microscopy

MicroscopeFEI TITAN KRIOS
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsC2 aperture diameter: 100.0 µm / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELDBright-field microscopy / Nominal defocus max: 4.0 µm / Nominal defocus min: 1.0 µm / Nominal magnification: 33000
Specialist opticsPhase plate: VOLTA PHASE PLATE / Energy filter - Name: GIF Bioquantum / Energy filter - Slit width: 20 eV
Sample stageSpecimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN
Image recordingFilm or detector model: GATAN K3 (6k x 4k) / Number grids imaged: 9 / Average exposure time: 0.45 sec. / Average electron dose: 2.5 e/Å2
Details: Images were collected in dose-fractionation mode with 0.1 second exposure per frame, for a total of 0.4 or 0.5 seconds per tilt image
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

-
Image processing

ExtractionNumber tomograms: 36 / Number images used: 36
Reference model: Average of manually preoriented particles with no search refinement
Method: Volumes picked manually
Software:
Namedetails
IMOD (ver. 4.11.5)Volume selection
Dynamo (ver. 1.1.509)Volume extraction

Details: In IMOD, volumes were manually selected and preoriented
Final angle assignmentType: ANGULAR RECONSTITUTION / Software - Name: Dynamo (ver. 1.1.509)
Final reconstructionApplied symmetry - Point group: C8 (8 fold cyclic) / Algorithm: BACK PROJECTION / Resolution.type: BY AUTHOR / Resolution: 50.0 Å / Resolution method: FSC 0.143 CUT-OFF
Details: FSC was calculated using the "adaptive bandpass filter" function in Dynamo. FSC was calculated between the two half maps using a mask that covered the rhoptry secretory apparatus structure ...Details: FSC was calculated using the "adaptive bandpass filter" function in Dynamo. FSC was calculated between the two half maps using a mask that covered the rhoptry secretory apparatus structure and the top of the associated rhoptry tip.
Number subtomograms used: 36
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