[English] 日本語
Yorodumi
- EMDB-35531: Focused refinement cryo-EM map of A1-A2 cylinder in cyanobacteria... -

+
Open data


ID or keywords:

Loading...

-
Basic information

Entry
Database: EMDB / ID: EMD-35531
TitleFocused refinement cryo-EM map of A1-A2 cylinder in cyanobacterial phycobilisome from Anthocerotibacter panamensis (Cluster A-1, Map01)
Map data
Sample
  • Complex: cyanobacterial phycobilisome
KeywordsComplex / PHOTOSYNTHESIS
Biological speciesAnthocerotibacter panamensis (bacteria)
Methodsingle particle reconstruction / cryo EM / Resolution: 2.64 Å
AuthorsWang CH / Yang CH / Wu HY / Jiang HW / Ho MC / Ho MY
Funding support Taiwan, 2 items
OrganizationGrant numberCountry
Academia Sinica (Taiwan) Taiwan
National Science Council (NSC, Taiwan) Taiwan
CitationJournal: Nat Commun / Year: 2023
Title: A structure of the relict phycobilisome from a thylakoid-free cyanobacterium.
Authors: Han-Wei Jiang / Hsiang-Yi Wu / Chun-Hsiung Wang / Cheng-Han Yang / Jui-Tse Ko / Han-Chen Ho / Ming-Daw Tsai / Donald A Bryant / Fay-Wei Li / Meng-Chiao Ho / Ming-Yang Ho /
Abstract: Phycobilisomes (PBS) are antenna megacomplexes that transfer energy to photosystems II and I in thylakoids. PBS likely evolved from a basic, inefficient form into the predominant hemidiscoidal shape ...Phycobilisomes (PBS) are antenna megacomplexes that transfer energy to photosystems II and I in thylakoids. PBS likely evolved from a basic, inefficient form into the predominant hemidiscoidal shape with radiating peripheral rods. However, it has been challenging to test this hypothesis because ancestral species are generally inaccessible. Here we use spectroscopy and cryo-electron microscopy to reveal a structure of a "paddle-shaped" PBS from a thylakoid-free cyanobacterium that likely retains ancestral traits. This PBS lacks rods and specialized ApcD and ApcF subunits, indicating relict characteristics. Other features include linkers connecting two chains of five phycocyanin hexamers (CpcN) and two core subdomains (ApcH), resulting in a paddle-shaped configuration. Energy transfer calculations demonstrate that chains are less efficient than rods. These features may nevertheless have increased light absorption by elongating PBS before multilayered thylakoids with hemidiscoidal PBS evolved. Our results provide insights into the evolution and diversification of light-harvesting strategies before the origin of thylakoids.
History
DepositionMar 3, 2023-
Header (metadata) releaseOct 25, 2023-
Map releaseOct 25, 2023-
UpdateMay 8, 2024-
Current statusMay 8, 2024Processing site: PDBj / Status: Released

-
Structure visualization

Supplemental images

emd_35531.png

Downloads & links

-
Map

FileDownload / File: emd_35531.map.gz / Format: CCP4 / Size: 1.2 GB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
1.06 Å/pix.
x 680 pix.
= 721.48 Å		1.06 Å/pix.
x 680 pix.
= 721.48 Å		1.06 Å/pix.
x 680 pix.
= 721.48 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 1.061 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 1.0
Minimum - Maximum-3.6721292 - 5.594665
Average (Standard dev.)-0.00033552604 (±0.10323032)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions680680680
Spacing680680680
CellA=B=C: 721.48 Å
α=β=γ: 90.0 °

-
Supplemental data

-
Additional map: #1

Fileemd_35531_additional_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

-
Half map: #1

Fileemd_35531_half_map_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

-
Half map: #2

Fileemd_35531_half_map_2.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

-
Sample components

-
Entire : cyanobacterial phycobilisome

EntireName: cyanobacterial phycobilisome
Components
  • Complex: cyanobacterial phycobilisome

-
Supramolecule #1: cyanobacterial phycobilisome

SupramoleculeName: cyanobacterial phycobilisome / type: complex / ID: 1 / Parent: 0
Source (natural)Organism: Anthocerotibacter panamensis (bacteria)

-
Experimental details

-
Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

-
Sample preparation

BufferpH: 7
VitrificationCryogen name: ETHANE

-
Electron microscopy

MicroscopeFEI TITAN KRIOS
Image recordingFilm or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Average electron dose: 50.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 2.0 µm / Nominal defocus min: 1.0 µm
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

-
Image processing

Startup modelType of model: INSILICO MODEL
Final reconstructionResolution.type: BY AUTHOR / Resolution: 2.64 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 1109579
Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: PROJECTION MATCHING

+
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