4W8Q

Crystal structure of truncated hemolysin A from P. mirabilis at 1.4 Angstroms resolution


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.428 Å
  • R-Value Free: 0.163 
  • R-Value Work: 0.139 

wwPDB Validation 3D Report Full Report


This is version 1.5 of the entry. See complete history

Literature

Proteolysis of truncated hemolysin A yields a stable dimerization interface.

Novak, W.R.Bhattacharyya, B.Grilley, D.P.Weaver, T.M.

(2017) Acta Crystallogr F Struct Biol Commun 73: 138-145

  • DOI: 10.1107/S2053230X17002102
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Wild-type and variant forms of HpmA265 (truncated hemolysin A) from Proteus mirabilis reveal a right-handed, parallel β-helix capped and flanked by segments of antiparallel β-strands. The low-salt crystal structures form a dimeric structure via the i ...

    Wild-type and variant forms of HpmA265 (truncated hemolysin A) from Proteus mirabilis reveal a right-handed, parallel β-helix capped and flanked by segments of antiparallel β-strands. The low-salt crystal structures form a dimeric structure via the implementation of on-edge main-chain hydrogen bonds donated by residues 243-263 of adjacent monomers. Surprisingly, in the high-salt structures of two variants, Y134A and Q125A-Y134A, a new dimeric interface is formed via main-chain hydrogen bonds donated by residues 203-215 of adjacent monomers, and a previously unobserved tetramer is formed. In addition, an eight-stranded antiparallel β-sheet is formed from the flap regions of crystallographically related monomers in the high-salt structures. This new interface is possible owing to additional proteolysis of these variants after Tyr240. The interface formed in the high-salt crystal forms of hemolysin A variants may mimic the on-edge β-strand positioning used in template-assisted hemolytic activity.


    Organizational Affiliation

    Department of Chemistry, Wabash College, 301 West Wabash Avenue, Crawfordsville, IN 47933, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Hemolysin
A
242Proteus mirabilisMutation(s): 0 
Gene Names: hpmA
Find proteins for P16466 (Proteus mirabilis)
Go to UniProtKB:  P16466
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.428 Å
  • R-Value Free: 0.163 
  • R-Value Work: 0.139 
  • Space Group: P 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 59.719α = 90.00
b = 34.317β = 99.21
c = 68.309γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Science Foundation (NSF, United States)United StatesMCB1050435

Revision History 

  • Version 1.0: 2015-07-29
    Type: Initial release
  • Version 1.1: 2017-03-22
    Type: Database references
  • Version 1.2: 2017-05-17
    Type: Database references
  • Version 1.3: 2017-09-20
    Type: Author supporting evidence
  • Version 1.4: 2017-09-27
    Type: Data collection
  • Version 1.5: 2019-11-27
    Type: Author supporting evidence