Structure of pentameric S-layer protein from Halofaerax volcanii

Experimental Data Snapshot

  • Resolution: 3.87 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

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Complete atomic structure of a native archaeal cell surface.

von Kugelgen, A.Alva, V.Bharat, T.A.M.

(2021) Cell Rep 37: 110052-110052

  • DOI: https://doi.org/10.1016/j.celrep.2021.110052
  • Primary Citation of Related Structures:  
    7PTP, 7PTR, 7PTT, 7PTU

  • PubMed Abstract: 

    Many prokaryotic cells are covered by an ordered, proteinaceous, sheet-like structure called a surface layer (S-layer). S-layer proteins (SLPs) are usually the highest copy number macromolecules in prokaryotes, playing critical roles in cellular physiology such as blocking predators, scaffolding membranes, and facilitating environmental interactions. Using electron cryomicroscopy of two-dimensional sheets, we report the atomic structure of the S-layer from the archaeal model organism Haloferax volcanii. This S-layer consists of a hexagonal array of tightly interacting immunoglobulin-like domains, which are also found in SLPs across several classes of archaea. Cellular tomography reveal that the S-layer is nearly continuous on the cell surface, completed by pentameric defects in the hexagonal lattice. We further report the atomic structure of the SLP pentamer, which shows markedly different relative arrangements of SLP domains needed to complete the S-layer. Our structural data provide a framework for understanding cell surfaces of archaea at the atomic level.

  • Organizational Affiliation

    Sir William Dunn School of Pathology, University of Oxford, Oxford OX1 3RE, UK.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Cell surface glycoprotein
A, B, C, D, E
793Haloferax volcanii DS2Mutation(s): 0 
Find proteins for P25062 (Haloferax volcanii (strain ATCC 29605 / DSM 3757 / JCM 8879 / NBRC 14742 / NCIMB 2012 / VKM B-1768 / DS2))
Explore P25062 
Go to UniProtKB:  P25062
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP25062
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 3.87 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion

Structure Validation

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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
Wellcome TrustUnited Kingdom202231/Z/16/Z
Leverhulme TrustUnited KingdomPhilip Leverhulme Prize
Other privateUnited KingdomVallee Scholarship

Revision History  (Full details and data files)

  • Version 1.0: 2021-12-15
    Type: Initial release