Mpf2Ba1 monomer

Experimental Data Snapshot

  • Resolution: 2.13 Å
  • R-Value Free: 0.241 
  • R-Value Work: 0.209 

wwPDB Validation   3D Report Full Report

This is version 1.2 of the entry. See complete history


Structural journey of an insecticidal protein against western corn rootworm.

Marini, G.Poland, B.Leininger, C.Lukoyanova, N.Spielbauer, D.Barry, J.K.Altier, D.Lum, A.Scolaro, E.Ortega, C.P.Yalpani, N.Sandahl, G.Mabry, T.Klever, J.Nowatzki, T.Zhao, J.Z.Sethi, A.Kassa, A.Crane, V.Lu, A.L.Nelson, M.E.Eswar, N.Topf, M.Saibil, H.R.

(2023) Nat Commun 14: 4171-4171

  • DOI: https://doi.org/10.1038/s41467-023-39891-7
  • Primary Citation of Related Structures:  
    8B6U, 8B6V, 8B6W

  • PubMed Abstract: 

    The broad adoption of transgenic crops has revolutionized agriculture. However, resistance to insecticidal proteins by agricultural pests poses a continuous challenge to maintaining crop productivity and new proteins are urgently needed to replace those utilized for existing transgenic traits. We identified an insecticidal membrane attack complex/perforin (MACPF) protein, Mpf2Ba1, with strong activity against the devastating coleopteran pest western corn rootworm (WCR) and a novel site of action. Using an integrative structural biology approach, we determined monomeric, pre-pore and pore structures, revealing changes between structural states at high resolution. We discovered an assembly inhibition mechanism, a molecular switch that activates pre-pore oligomerization upon gut fluid incubation and solved the highest resolution MACPF pore structure to-date. Our findings demonstrate not only the utility of Mpf2Ba1 in the development of biotechnology solutions for protecting maize from WCR to promote food security, but also uncover previously unknown mechanistic principles of bacterial MACPF assembly.

  • Organizational Affiliation

    Institute of Structural and Molecular Biology, Birkbeck, University of London, Malet St, London, WC1E 7HX, UK.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Mpf2Ba1483Pseudomonas monteiliiMutation(s): 0 
Find proteins for A0A4Y8SM08 (Pseudomonas sp. RIT623)
Explore A0A4Y8SM08 
Go to UniProtKB:  A0A4Y8SM08
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA0A4Y8SM08
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on MG

Download Ideal Coordinates CCD File 
Experimental Data & Validation

Experimental Data

  • Resolution: 2.13 Å
  • R-Value Free: 0.241 
  • R-Value Work: 0.209 
  • Space Group: P 41 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 127.6α = 90
b = 127.6β = 90
c = 116.12γ = 90
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

View Full Validation Report

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
Wellcome TrustUnited Kingdom202679/Z/16/Z
Wellcome TrustUnited Kingdom206166/Z/17/Z

Revision History  (Full details and data files)

  • Version 1.0: 2023-05-31
    Type: Initial release
  • Version 1.1: 2023-07-26
    Changes: Database references
  • Version 1.2: 2024-02-07
    Changes: Data collection, Refinement description