6IUG

Cryo-EM structure of the plant actin filaments from Zea mays pollen


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.9 Å
  • Aggregation State: FILAMENT 
  • Reconstruction Method: HELICAL 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Cryo-EM Structure of Actin Filaments from Zea mays Pollen.

Ren, Z.Zhang, Y.Zhang, Y.He, Y.Du, P.Wang, Z.Sun, F.Ren, H.

(2019) Plant Cell --: --

  • DOI: 10.1105/tpc.18.00973

  • PubMed Abstract: 
  • Actins are among the most abundant and conserved proteins in plant, mammalian and other eukaryotic cells, where they form filamentous structures to perform vital roles in key cellular processes. Although large amounts of data on the biochemical activ ...

    Actins are among the most abundant and conserved proteins in plant, mammalian and other eukaryotic cells, where they form filamentous structures to perform vital roles in key cellular processes. Although large amounts of data on the biochemical activities, dynamic behaviors and important cellular functions of plant actin filaments have been accumulated, their structural basis is still elusive. Here, we report a 3.9 Å structure of the plant actin filament (ZMPA) from Zea mays pollen using cryo-electron microscopy. The structure shows a right-handed, parallel and staggered architecture that is stabilized by intra- and interstrand interactions. While the overall structure resembles that of other actin filaments, its DNase I-binding loop (D-loop) bends further outward, adopting an open conformation similar to that of the jasplakinolide- or BeFx-stabil1ized rabbit skeleton muscle actin (RSMA) filament. Single-molecule magnetic tweezers analysis revealed that the ZMPA filament can resist greater stretching force than the RSMA filament. Overall, these data provide evidence that plant actin filaments have greater stability than animal actin filaments, which is important for their roles as tracks for long-distance vesicle and organelle transportation.


    Organizational Affiliation

    Institute of Biophysics, Chinese Academy of Sciences CITY: Beijing China [CN].,Center for Biological Science and Technology, Key Laboratory of Cell Proliferation and Regulation Biology of Ministry of Education, College of Life Sciences, Beijing Normal University CITY: Beijing China [CN].,Key Laboratory of Cell Proliferation and Regulation Biology of Ministry of Education, Center for Biological Science and Technology, College of Life Sciences, Beijing Normal University CITY: Zhuhai POSTAL_CODE: 519087 China [CN] hren@bnu.edu.cn.,College of Life Science CITY: Beijing STATE: Beijing POSTAL_CODE: 100875 China [CN].




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
pollen F-actin
A, B, C, D, E
371Zea maysMutation(s): 0 
Gene Names: 103625937
Find proteins for B6TQ08 (Zea mays)
Go to UniProtKB:  B6TQ08
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ADP
Query on ADP

Download SDF File 
Download CCD File 
A, B, C, D, E
ADENOSINE-5'-DIPHOSPHATE
C10 H15 N5 O10 P2
XTWYTFMLZFPYCI-KQYNXXCUSA-N
 Ligand Interaction
MG
Query on MG

Download SDF File 
Download CCD File 
A, B, C, D, E
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.9 Å
  • Aggregation State: FILAMENT 
  • Reconstruction Method: HELICAL 
Software Package:
Software NamePurpose
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Natural Science Foundation of ChinaChina91854206
National Natural Science Foundation of ChinaChina31770206
National Natural Science Foundation of ChinaChina31770794
Ministry of Science and Technology (China)China2013CB126902
Ministry of Science and Technology (China)China2017YFA0504700

Revision History 

  • Version 1.0: 2019-11-06
    Type: Initial release