7C7U

Biofilm associated protein - BSP domain


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.93 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.208 
  • R-Value Observed: 0.210 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Structural mechanism for modulation of functional amyloid and biofilm formation by Staphylococcal Bap protein switch.

Ma, J.Cheng, X.Xu, Z.Zhang, Y.Valle, J.Fan, S.Zuo, X.Lasa, I.Fang, X.

(2021) EMBO J 40: e107500-e107500

  • DOI: 10.15252/embj.2020107500
  • Primary Citation of Related Structures:  
    7C7R, 7C7U

  • PubMed Abstract: 
  • The Staphylococcal Bap proteins sense environmental signals (such as pH, [Ca 2+ ]) to build amyloid scaffold biofilm matrices via unknown mechanisms. We here report the crystal structure of the aggregation-prone region of Staphylococcus aureus Bap which adopts a dumbbell-shaped fold ...

    The Staphylococcal Bap proteins sense environmental signals (such as pH, [Ca 2+ ]) to build amyloid scaffold biofilm matrices via unknown mechanisms. We here report the crystal structure of the aggregation-prone region of Staphylococcus aureus Bap which adopts a dumbbell-shaped fold. The middle module (MM) connecting the N-terminal and C-terminal lobes consists of a tandem of novel double-Ca 2+ -binding motifs involved in cooperative interaction networks, which undergoes Ca 2+ -dependent order-disorder conformational switches. The N-terminal lobe is sufficient to mediate amyloid aggregation through liquid-liquid phase separation and maturation, and subsequent biofilm formation under acidic conditions. Such processes are promoted by disordered MM at low [Ca 2+ ] but inhibited by ordered MM stabilized by Ca 2+ binding, with inhibition efficiency depending on structural integrity of the interaction networks. These studies illustrate a novel protein switch in pathogenic bacteria and provide insights into the mechanistic understanding of Bap proteins in modulation of functional amyloid and biofilm formation, which could be implemented in the anti-biofilm drug design.


    Related Citations: 
    • Integrative structure and functional implications of a 236-kDa modular protein Bap from Staphylococcus aureus
      Ma, J.F., Zhang, Y.K., Cheng, X., Fan, S.L., Xu, N., Fang, X.Y.
      () To be published --: --

    Organizational Affiliation

    Beijing Advanced Innovation Center for Structural Biology, School of Life Sciences, Tsinghua University, Beijing, China.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Biofilm-associated surface proteinA, B607Staphylococcus aureusMutation(s): 0 
Gene Names: bap
UniProt
Find proteins for Q79LN3 (Staphylococcus aureus)
Explore Q79LN3 
Go to UniProtKB:  Q79LN3
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.93 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.208 
  • R-Value Observed: 0.210 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 51.737α = 90
b = 167.726β = 90
c = 89.316γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
PDB_EXTRACTdata extraction
XDSdata reduction
XDSdata scaling
PHASERphasing
MOLREPphasing
PHENIXphasing

Structure Validation

View Full Validation Report




Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Natural Science Foundation of China (NSFC)China31872712

Revision History  (Full details and data files)

  • Version 1.0: 2021-05-12
    Type: Initial release
  • Version 1.1: 2021-05-19
    Changes: Author supporting evidence, Database references, Structure summary
  • Version 1.2: 2021-06-09
    Changes: Database references
  • Version 1.3: 2021-07-28
    Changes: Database references