8R2N | pdb_00008r2n

Structure of the BeeR filament

  • Classification: STRUCTURAL PROTEIN
  • Organism(s): Opitutus terrae
  • Expression System: Escherichia coli
  • Mutation(s): No 

  • Deposited: 2023-11-07 Released: 2025-03-05 
  • Deposition Author(s): Bergeron, J.R.C., Kollman, J.M.
  • Funding Organization(s): Biotechnology and Biological Sciences Research Council (BBSRC), Human Frontier Science Program (HFSP), National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)

Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.10 Å
  • Aggregation State: FILAMENT 
  • Reconstruction Method: HELICAL 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

A family of bacterial actin homologs forms a three-stranded tubular structure.

Bergeron, J.R.C.Lale-Farjat, S.L.M.Lewicka, H.M.Parry, C.Kollman, J.M.

(2025) Proc Natl Acad Sci U S A 122: e2500913122-e2500913122

  • DOI: https://doi.org/10.1073/pnas.2500913122
  • Primary Citation of Related Structures:  
    8R2N

  • PubMed Abstract: 

    The cytoskeleton is crucial for cell organization and movement. In Eukaryotes, it largely consists of the protein actin, that forms a double-stranded linear filamentous structure in the presence of ATP and disassemble upon ATP hydrolysis. Bacteria also possess actin homologs, that drive fundamental cellular processes, including cell division, shape maintenance, and DNA segregation. Like eukaryotic actin, bacterial actins assemble into dynamic polymers upon ATP binding, however variation in interactions between strands gives rise to striking diversity of filament architectures. Here, we report a family of bacterial actins of unknown function, conserved among the Verrucomicrobiota phylum, which assembles into a unique tubular structure in the presence of ATP. A cryo-EM structure of the filaments reveals that it consists of three strands, unlike other described bacterial actin structures. This architecture provides further insights into the organization of actin-like filaments and has implications for understanding the diversity and evolution of the bacterial cytoskeleton.


  • Organizational Affiliation
    • Randall Centre for Cell and Molecular Biophysics, King's College London, London SE1 1UL, United Kingdom.

Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Actin/actin family protein
A, B, C, D, E
A, B, C, D, E, F, G, H, I, J, K, L
386Opitutus terraeMutation(s): 0 
Gene Names: Oter_3137
UniProt
Find proteins for B1ZZL4 (Opitutus terrae (strain DSM 11246 / JCM 15787 / PB90-1))
Explore B1ZZL4 
Go to UniProtKB:  B1ZZL4
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupB1ZZL4
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
ATP (Subject of Investigation/LOI)
Query on ATP

Download Ideal Coordinates CCD File 
AA [auth H]
CA [auth I]
EA [auth J]
GA [auth K]
IA [auth L]
AA [auth H],
CA [auth I],
EA [auth J],
GA [auth K],
IA [auth L],
M [auth A],
O [auth B],
Q [auth C],
S [auth D],
U [auth E],
W [auth F],
Y [auth G]
ADENOSINE-5'-TRIPHOSPHATE
C10 H16 N5 O13 P3
ZKHQWZAMYRWXGA-KQYNXXCUSA-N
CA
Query on CA

Download Ideal Coordinates CCD File 
BA [auth H]
DA [auth I]
FA [auth J]
HA [auth K]
JA [auth L]
BA [auth H],
DA [auth I],
FA [auth J],
HA [auth K],
JA [auth L],
N [auth A],
P [auth B],
R [auth C],
T [auth D],
V [auth E],
X [auth F],
Z [auth G]
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.10 Å
  • Aggregation State: FILAMENT 
  • Reconstruction Method: HELICAL 

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Biotechnology and Biological Sciences Research Council (BBSRC)United KingdomBB/R009759/2
Human Frontier Science Program (HFSP)FranceRGY0080/2021
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesR35149542

Revision History  (Full details and data files)

  • Version 1.0: 2025-03-05
    Type: Initial release
  • Version 1.1: 2025-03-26
    Changes: Data collection, Database references