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An Effective Inoculation Method for Phytophthora capsici on Black Pepper Plants
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How to frustrate a plant pathogen.

Gregory Knight1, Jonathan Heddle1, Adam R Bentham1

  • 1Centre for Programmable Biological Matter, Department of Biosciences, Durham University, Durham, DH1 3LE, UK.

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Summary
This summary is machine-generated.

Sequence-unrelated but structurally similar (SUSS) effectors use similar protein structures for diverse functions. Analyzing surface frustration could lead to broad-spectrum resistance strategies against plant pathogens.

Keywords:
bioengineeringbiophysicseffectorsfrustrationplant immunityprotein designstructural biology

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Area of Science:

  • Plant pathology
  • Structural biology
  • Evolutionary biology

Background:

  • Sequence-unrelated but structurally similar (SUSS) effector families represent a unique evolutionary strategy in plant pathogen virulence.
  • These effectors share conserved three-dimensional folds despite low sequence identity, enabling functional diversification.
  • This challenges the classic structure-function paradigm, highlighting stable scaffolds for rapid functional adaptation.

Purpose of the Study:

  • To explore the functionalization mechanisms of SUSS effectors.
  • To investigate the role of surface frustration in SUSS effector evolution and function.
  • To propose novel strategies for engineering broad-spectrum resistance against plant pathogens.

Main Methods:

  • Comparative structural analyses of SUSS effector families (e.g., MAX, LARS, RALPH).
  • Analysis of surface frustration as a conserved feature across divergent SUSS effectors.
  • Review of potential resistance engineering strategies, including AI-driven protein design.

Main Results:

  • SUSS effectors exploit stable protein scaffolds for functional diversification via extreme sequence variation.
  • Surface frustration, crucial for fold flexibility, may be conserved across SUSS family members despite sequence divergence.
  • This conserved surface frustration presents a potential vulnerability for resistance engineering.

Conclusions:

  • SUSS effectors demonstrate a decoupling of structural conservation from functional specificity.
  • Conserved surface frustration in SUSS effectors offers a target for broad-spectrum resistance.
  • Strategies combining structural genomics, frustration analysis, and AI design can neutralize entire SUSS effector families.