Presentation Information
[3FMBS-05-KL]Sensing Shape, Growing Gold: Molecular Principles for Membrane Geometry and Nanoparticle Design
○Masayoshi Tanaka1 (1. Institute of Science Tokyo (Japan))
Keywords:
Membrane curvature sensing,Biomineralization,Peptide,Proteomics
[Purpose]
Living systems precisely control both membrane geometry and inorganic material formation under mild conditions, offering powerful design principles for next-generation functional materials. In this study, we aim to develop molecular tools that (i) decode how biomolecules recognize membrane shape and (ii) utilize peptide sequences to direct gold nanomaterial formation. By integrating insights from membrane biophysics and biomineralization, we seek to establish a unified framework for bioinspired materials design.
[Method]
For the analysis of membrane geometry recognition, we employ model membrane systems that enable quantitative evaluation of protein–membrane interactions under defined curvature conditions. In parallel, we utilize a hierarchical peptide array screening approach to systematically explore peptide–gold interactions across large sequence spaces. Identified peptides are further evaluated for their ability to mediate gold nanoparticle formation and control nanostructure morphology.
[Results]
On the membrane side, our analyses revealed that protein–membrane interactions are strongly influenced by membrane geometry, highlighting the importance of physical shape as a regulatory parameter beyond conventional biochemical specificity. Building on this concept of shape-dependent molecular interactions, systematic peptide screening identified a large number of gold-binding sequences, among which specific subsets exhibited strong biomineralization activity. These peptides enabled controlled synthesis of gold nanostructures, including triangular nanoplates and ultrasmall nanoparticles, under mild aqueous conditions. Notably, even single amino acid substitutions resulted in continuous modulation of nanoparticle geometry, demonstrating that nanostructure formation is directly encoded in peptide sequence.
[Consideration]
These results suggest that biological systems utilize two complementary molecular principles: (i) geometry-dependent molecular recognition and (ii) sequence-encoded control of material formation. Membrane geometry emerges as a fundamental parameter that governs molecular localization and function, independent of classical ligand–receptor interactions. At the same time, the ability of short peptides to encode both discrete structural selection and continuous morphological tuning of inorganic materials indicates a highly programmable interface between biological molecules and nanomaterials.
[Conclusion]
This work demonstrates that learning from how living systems “sense shape” and “build materials” provides a powerful strategy for designing functional nanomaterials. The integration of peptide-guided biomineralization and membrane geometry recognition offers a versatile and sustainable platform for applications in sensing, nanomedicine, and biointerface engineering.
Living systems precisely control both membrane geometry and inorganic material formation under mild conditions, offering powerful design principles for next-generation functional materials. In this study, we aim to develop molecular tools that (i) decode how biomolecules recognize membrane shape and (ii) utilize peptide sequences to direct gold nanomaterial formation. By integrating insights from membrane biophysics and biomineralization, we seek to establish a unified framework for bioinspired materials design.
[Method]
For the analysis of membrane geometry recognition, we employ model membrane systems that enable quantitative evaluation of protein–membrane interactions under defined curvature conditions. In parallel, we utilize a hierarchical peptide array screening approach to systematically explore peptide–gold interactions across large sequence spaces. Identified peptides are further evaluated for their ability to mediate gold nanoparticle formation and control nanostructure morphology.
[Results]
On the membrane side, our analyses revealed that protein–membrane interactions are strongly influenced by membrane geometry, highlighting the importance of physical shape as a regulatory parameter beyond conventional biochemical specificity. Building on this concept of shape-dependent molecular interactions, systematic peptide screening identified a large number of gold-binding sequences, among which specific subsets exhibited strong biomineralization activity. These peptides enabled controlled synthesis of gold nanostructures, including triangular nanoplates and ultrasmall nanoparticles, under mild aqueous conditions. Notably, even single amino acid substitutions resulted in continuous modulation of nanoparticle geometry, demonstrating that nanostructure formation is directly encoded in peptide sequence.
[Consideration]
These results suggest that biological systems utilize two complementary molecular principles: (i) geometry-dependent molecular recognition and (ii) sequence-encoded control of material formation. Membrane geometry emerges as a fundamental parameter that governs molecular localization and function, independent of classical ligand–receptor interactions. At the same time, the ability of short peptides to encode both discrete structural selection and continuous morphological tuning of inorganic materials indicates a highly programmable interface between biological molecules and nanomaterials.
[Conclusion]
This work demonstrates that learning from how living systems “sense shape” and “build materials” provides a powerful strategy for designing functional nanomaterials. The integration of peptide-guided biomineralization and membrane geometry recognition offers a versatile and sustainable platform for applications in sensing, nanomedicine, and biointerface engineering.
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