4P1X

Crystal structure of staphylococcal LUK prepore

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free: 0.223 
  • R-Value Work: 0.182 
  • R-Value Observed: 0.183 

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This is version 1.1 of the entry. See complete history. 


Literature

Molecular basis of transmembrane beta-barrel formation of staphylococcal pore-forming toxins.

Yamashita, D., Sugawara, T., Takeshita, M., Kaneko, J., Kamio, Y., Tanaka, I., Tanaka, Y., Yao, M.

(2014) Nat Commun 5: 4897-4897

  • DOI: 10.1038/ncomms5897
  • Primary Citation of Related Structures:  
    4P1X, 4P1Y

  • PubMed Abstract: 

    • Pathogenic bacteria secrete pore-forming toxins (PFTs) to attack target cells. PFTs are expressed as water-soluble monomeric proteins, which oligomerize into nonlytic prepore intermediates on the target cell membrane before forming membrane-spanning ...

    Pathogenic bacteria secrete pore-forming toxins (PFTs) to attack target cells. PFTs are expressed as water-soluble monomeric proteins, which oligomerize into nonlytic prepore intermediates on the target cell membrane before forming membrane-spanning pores. Despite a wealth of biochemical data, the lack of high-resolution prepore structural information has hampered understanding of the β-barrel formation process. Here, we report crystal structures of staphylococcal γ-haemolysin and leucocidin prepores. The structures reveal a disordered bottom half of the β-barrel corresponding to the transmembrane region, and a rigid upper extramembrane half. Spectroscopic analysis of fluorescently labelled mutants confirmed that the prepore is distinct from the pore within the transmembrane region. Mutational analysis also indicates a pivotal role for the glycine residue located at the lipid-solvent interface as a 'joint' between the two halves of the β-barrel. These observations suggest a two-step transmembrane β-barrel pore formation mechanism in which the upper extramembrane and bottom transmembrane regions are formed independently.

    Organizational Affiliation: 

    1] Graduate School of Life Sciences, Hokkaido University, Sapporo 060-0810, Japan [2] Faculty of Advanced Life Science, Hokkaido University, Sapporo 060-0810, Japan.



Macromolecules
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(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Gamma-hemolysin component CB, D, F, H296Staphylococcus aureus subsp. aureus Mu50Mutation(s): 0 
Gene Names: hlgC, SAV2420
Membrane protein
Mpstruc		Group: 
TRANSMEMBRANE PROTEINS: BETA-BARREL		Sub Group: 
Adventitious Membrane Proteins: Beta-sheet Pore-forming Toxins/Attack Complexes		Protein: 
LUK prepore formed from LukF & LukS
Find proteins for Q99RL1 (Staphylococcus aureus (strain Mu50 / ATCC 700699))
Explore Q99RL1 
Go to UniProtKB:  Q99RL1
Protein Feature View
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  • Reference Sequence
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(by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Gamma-hemolysin component BA, C, E, G309Staphylococcus aureus subsp. aureus Mu50Mutation(s): 1 
Gene Names: hlgB, SAV2421
Membrane protein
Mpstruc		Group: 
TRANSMEMBRANE PROTEINS: BETA-BARREL		Sub Group: 
Adventitious Membrane Proteins: Beta-sheet Pore-forming Toxins/Attack Complexes		Protein: 
LUK prepore formed from LukF & LukS
Find proteins for A0A0H3JX61 (Staphylococcus aureus (strain Mu50 / ATCC 700699))
Explore A0A0H3JX61 
Go to UniProtKB:  A0A0H3JX61
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MPD
Query on MPD
Download Ideal Coordinates CCD File 
A, C, E, G
(4S)-2-METHYL-2,4-PENTANEDIOL
C6 H14 O2
SVTBMSDMJJWYQN-YFKPBYRVSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free: 0.223 
  • R-Value Work: 0.182 
  • R-Value Observed: 0.183 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 193.31α = 90
b = 193.16β = 118.94
c = 116.38γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-10-01
    Type: Initial release
  • Version 1.1: 2014-10-15
    Changes: Database references