9v4f
Soy storage protein fibril (glycinin A) PM2
Structural highlights
FunctionGLYG4_SOYBN Glycinin is the major seed storage protein of soybean (PubMed:2485233). Glycinin basic peptides (GBPs), and, to a lower extent, glycinin exhibit antibacterial activity against Gram-negative and Gram-positive bacteria (e.g. L.monocytogenes, B.subtilis, E.coli and S.enteritidis) by forming pores and aggregating in transmembranes, leading to membrane permeability and, eventually, cell death (PubMed:22236762, PubMed:28590128, Ref.17).[1] [2] [3] [4] Publication Abstract from PubMedPlant-derived amyloid fibrils represent a promising class of sustainable nanomaterials outperforming their native counterparts in functionalities; however, the atomic-level structural mechanisms behind these enhancements have yet to be elucidated. Using cryo-EM, near-atomic resolution structures (3.4 and 3.5 A) are determined for two distinct fibril polymorphs assembled in vitro from soy glycinin-A subunit. The dominant Type I fibril exhibits an unprecedented dual-core architecture, characterized by spatially segregated hydrophilic (Asp172-Asn178/Asn178'-Asp172') and hydrophobic (Val166-Ile168/Val186'-Pro184') domains, which contribute to a unique amyloid fold distinct from many known amyloid structures, including pathological and functional amyloids. In contrast, the minor Type II fibril adopts a conventional extended hydrophobic core with Tyr155-Tyr158 pi-stacking. These atomic structures establish fundamental structure-property relationships that will inform the rational design of plant protein-based nanomaterials. Dual Hydrophilic-Hydrophobic Core Architecture in Soy Glycinin Amyloid Fibrils Revealed by Cryo-EM.,Li S, Li S, Cheng Y, Fang Y, Cao Q, Cao Y Adv Sci (Weinh). 2025 Aug 29:e09821. doi: 10.1002/advs.202509821. PMID:40883254[5] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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