Structural journey of an insecticidal protein against western corn rootworm
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Published:2023-07-13
Issue:1
Volume:14
Page:
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ISSN:2041-1723
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Container-title:Nature Communications
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language:en
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Short-container-title:Nat Commun
Author:
Marini Guendalina, Poland Brad, Leininger ChrisORCID, Lukoyanova Natalya, Spielbauer Dan, Barry Jennifer K., Altier Dan, Lum Amy, Scolaro Eric, Ortega Claudia Pérez, Yalpani Nasser, Sandahl Gary, Mabry Tim, Klever Jeffrey, Nowatzki Timothy, Zhao Jian-ZhouORCID, Sethi AmitORCID, Kassa AdaneORCID, Crane Virginia, Lu Albert L., Nelson Mark E.ORCID, Eswar NarayananORCID, Topf MayaORCID, Saibil Helen R.ORCID
Abstract
AbstractThe 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.
Publisher
Springer Science and Business Media LLC
Subject
General Physics and Astronomy,General Biochemistry, Genetics and Molecular Biology,General Chemistry,Multidisciplinary
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