[English] 日本語
Yorodumi
- EMDB-13748: Preliminary Single particle cryo-EM reconstruction of a 40-mer as... -

+
Open data


ID or keywords:

Loading...

-
Basic information

Entry
Database: EMDB / ID: EMD-13748
TitlePreliminary Single particle cryo-EM reconstruction of a 40-mer assembly of Hsp26 purified from yeast.
Map data
Sample40mer complex of WT Hsp26:
Hsp26
Function / homology
Function and homology information


cytoplasmic stress granule / unfolded protein binding / cellular response to heat / protein folding / mRNA binding / mitochondrion / identical protein binding / nucleus / cytoplasm
Similarity search - Function
: / Hsp20/alpha crystallin family / Small heat shock protein (sHSP) domain profile. / Alpha crystallin/Hsp20 domain / HSP20-like chaperone
Similarity search - Domain/homology
Heat shock protein 26
Similarity search - Component
Biological speciesSaccharomyces cerevisiae (baker's yeast)
Methodsingle particle reconstruction / cryo EM / Resolution: 10 Å
AuthorsPeters C / Weinkauf S / Buchner J
Funding support Germany, 1 items
OrganizationGrant numberCountry
German Research Foundation (DFG)SFB 1035 Germany
Citation
Journal: Nat Commun / Year: 2021
Title: Phosphorylation activates the yeast small heat shock protein Hsp26 by weakening domain contacts in the oligomer ensemble.
Authors: Moritz Mühlhofer / Carsten Peters / Thomas Kriehuber / Marina Kreuzeder / Pamina Kazman / Natalia Rodina / Bernd Reif / Martin Haslbeck / Sevil Weinkauf / Johannes Buchner /
Abstract: Hsp26 is a small heat shock protein (sHsp) from S. cerevisiae. Its chaperone activity is activated by oligomer dissociation at heat shock temperatures. Hsp26 contains 9 phosphorylation sites in ...Hsp26 is a small heat shock protein (sHsp) from S. cerevisiae. Its chaperone activity is activated by oligomer dissociation at heat shock temperatures. Hsp26 contains 9 phosphorylation sites in different structural elements. Our analysis of phospho-mimetic mutations shows that phosphorylation activates Hsp26 at permissive temperatures. The cryo-EM structure of the Hsp26 40mer revealed contacts between the conserved core domain of Hsp26 and the so-called thermosensor domain in the N-terminal part of the protein, which are targeted by phosphorylation. Furthermore, several phosphorylation sites in the C-terminal extension, which link subunits within the oligomer, are sensitive to the introduction of negative charges. In all cases, the intrinsic inhibition of chaperone activity is relieved and the N-terminal domain becomes accessible for substrate protein binding. The weakening of domain interactions within and between subunits by phosphorylation to activate the chaperone activity in response to proteotoxic stresses independent of heat stress could be a general regulation principle of sHsps.
#1: Journal: Structure / Year: 2006
Title: Multiple distinct assemblies reveal conformational flexibility in the small heat shock protein Hsp26.
Authors: White HE / Orlova EV / Chen S / Wang L / Ignatiou A / Gowen B / Stromer T / Franzmann TM / Haslbeck M / Buchner J / Saibil HR
History
DepositionOct 15, 2021-
Header (metadata) releaseNov 24, 2021-
Map releaseNov 24, 2021-
UpdateDec 1, 2021-
Current statusDec 1, 2021Processing site: PDBe / Status: Released

-
Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 0.32
  • Imaged by UCSF Chimera
  • Download
  • Surface view colored by cylindrical radius
  • Surface level: 0.32
  • Imaged by UCSF Chimera
  • Download
Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

Downloads & links

-
Map

FileDownload / File: emd_13748.map.gz / Format: CCP4 / Size: 83.7 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
1.33 Å/pix.
x 280 pix.
= 372.4 Å
1.33 Å/pix.
x 280 pix.
= 372.4 Å
1.33 Å/pix.
x 280 pix.
= 372.4 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 1.33 Å
Density
Contour LevelBy AUTHOR: 0.32 / Movie #1: 0.32
Minimum - Maximum-0.06688542 - 0.80069435
Average (Standard dev.)0.0067935237 (±0.06552434)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions280280280
Spacing280280280
CellA=B=C: 372.40002 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z1.331.331.33
M x/y/z280280280
origin x/y/z0.0000.0000.000
length x/y/z372.400372.400372.400
α/β/γ90.00090.00090.000
start NX/NY/NZ000
NX/NY/NZ352352352
MAP C/R/S123
start NC/NR/NS000
NC/NR/NS280280280
D min/max/mean-0.0670.8010.007

-
Supplemental data

-
Sample components

-
Entire 40mer complex of WT Hsp26

EntireName: 40mer complex of WT Hsp26 / Number of Components: 2

-
Component #1: protein, 40mer complex of WT Hsp26

ProteinName: 40mer complex of WT Hsp26 / Recombinant expression: No
MassTheoretical: 955.2 kDa
SourceSpecies: Saccharomyces cerevisiae (baker's yeast)
Source (engineered)Expression System: Saccharomyces cerevisiae (baker's yeast) / Vector: pJV517 / Strain: JT(DIP) GPD26(A)

-
Component #2: protein, Hsp26

ProteinName: Hsp26 / Recombinant expression: No
SourceSpecies: Saccharomyces cerevisiae (baker's yeast)
Source (engineered)Expression System: Saccharomyces cerevisiae (baker's yeast)

-
Experimental details

-
Sample preparation

SpecimenSpecimen State: Particle / Method: cryo EM
Sample solutionpH: 7.4
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen Name: OTHER / Temperature: 294 K / Humidity: 100 %

-
Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
ImagingMicroscope: FEI TITAN KRIOS
Electron gunElectron Source: FIELD EMISSION GUN / Accelerating Voltage: 300 kV / Electron Dose: 140 e/Å2 / Illumination Mode: FLOOD BEAM
LensMagnification: 105000.0 X (nominal) / Cs: 2.7 mm / Imaging Mode: BRIGHT FIELD / Defocus: 600.0 - 2800.0 nm / Energy Filter: GIF Quantum LS
Specimen HolderModel: FEI TITAN KRIOS AUTOGRID HOLDER
CameraDetector: GATAN K2 SUMMIT (4k x 4k)

-
Image acquisition

Image acquisitionNumber of Digital Images: 1170

-
Image processing

ProcessingMethod: single particle reconstruction / Applied Symmetry: C4 (4 fold cyclic) / Number of Projections: 37763
3D reconstructionSoftware: cryoSPARC / Resolution: 10 Å / Resolution Method: FSC 0.143 CUT-OFF
FSC plot (resolution estimation)

+
About Yorodumi

-
News

-
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

+
Jun 16, 2017. Omokage search with filter

Omokage search with filter

Result of Omokage search can be filtered by keywords and the database types

Related info.:Omokage search

-
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