2YKT

Crystal structure of the I-BAR domain of IRSp53 (BAIAP2) in complex with an EHEC derived Tir peptide


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.11 Å
  • R-Value Free: 0.276 
  • R-Value Work: 0.233 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural Basis for Complex Formation between Human Irsp53 and the Translocated Intimin Receptor Tir of Enterohemorrhagic E. Coli.

De Groot, J.C.Schluter, K.Carius, Y.Quedenau, C.Vingadassalom, D.Faix, J.Weiss, S.M.Reichelt, J.Standfuss-Gabisch, C.Lesser, C.F.Leong, J.M.Heinz, D.W.Bussow, K.Stradal, T.E.B.

(2011) Structure 19: 1294

  • DOI: 10.1016/j.str.2011.06.015

  • PubMed Abstract: 
  • Actin assembly beneath enterohemorrhagic E. coli (EHEC) attached to its host cell is triggered by the intracellular interaction of its translocated effector proteins Tir and EspF(U) with human IRSp53 family proteins and N-WASP. Here, we report the st ...

    Actin assembly beneath enterohemorrhagic E. coli (EHEC) attached to its host cell is triggered by the intracellular interaction of its translocated effector proteins Tir and EspF(U) with human IRSp53 family proteins and N-WASP. Here, we report the structure of the N-terminal I-BAR domain of IRSp53 in complex with a Tir-derived peptide, in which the homodimeric I-BAR domain binds two Tir molecules aligned in parallel. This arrangement provides a protein scaffold linking the bacterium to the host cell's actin polymerization machinery. The structure uncoversĀ a specific peptide-binding site on the I-BAR surface, conserved between IRSp53 and IRTKS. The Tir Asn-Pro-Tyr (NPY) motif, essential for pedestal formation, is specifically recognized by this binding site. The site was confirmed by mutagenesis and inĀ vivo-binding assays. It is possible that IRSp53 utilizes the NPY-binding site for additional interactions with as yet unknown partners within the host cell.


    Organizational Affiliation

    Division of Structural Biology, Helmholtz Centre for Infection Research, 38124 Braunschweig, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
BRAIN-SPECIFIC ANGIOGENESIS INHIBITOR 1-ASSOCIATED PROTEIN 2
A
253Homo sapiensMutation(s): 0 
Gene Names: BAIAP2
Find proteins for Q9UQB8 (Homo sapiens)
Go to Gene View: BAIAP2
Go to UniProtKB:  Q9UQB8
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
TRANSLOCATED INTIMIN RECEPTOR PROTEIN
B
13Escherichia coli O157:H7 (strain TW14359 / EHEC)Mutation(s): 0 
Gene Names: tir (espE)
Find proteins for C6UYL8 (Escherichia coli O157:H7 (strain TW14359 / EHEC))
Go to UniProtKB:  C6UYL8
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
NH2
Query on NH2
B
NON-POLYMERH2 N

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Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.11 Å
  • R-Value Free: 0.276 
  • R-Value Work: 0.233 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 88.354α = 90.00
b = 187.362β = 90.00
c = 36.806γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata reduction
MOLREPphasing
XSCALEdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-09-07
    Type: Initial release
  • Version 1.1: 2011-10-26
    Type: Database references
  • Version 1.2: 2015-04-01
    Type: Database references