Build-a-Cell seminar Aleksei Aksimentiev: Building Synthetic Membrane-Embedded Nanomachines

Item: Build-a-Cell seminar Aleksei Aksimentiev: Building Synthetic Membrane-Embedded Nanomachines
Rating: 4
Author: PostSingularity Institute

by Aleksei Aksimentiev

Formal & Physical Sciences Chemistry PNChemistry PNNOrganic chemistry

🎙 Aleksei Aksimentiev 👥 2K 📅 August 27, 2026 ⏱ 46 min 👁 5 📄 expert opinion 🧭 2026-08-27

Available in: English (current) Français

Keywords

DNA origamimembrane nanoporesmolecular dynamicselectromotorscramblase

Summary

Aleksei Aksimentiev presents his lab’s work on building synthetic membrane-embedded nanomachines using DNA origami and all-atom molecular dynamics simulations. He introduces the ‘computational microscope’ approach, which allows atomistic modeling of biomolecular systems. The talk covers the design and simulation of DNA nanopores, including their insertion into lipid membranes via hydrophobic anchors. Simulations revealed that DNA nanopores induce toroidal pores in the membrane, enabling lipid scrambling, a function typically performed by scramblase enzymes. This was experimentally validated and shown to trigger apoptosis. The talk also discusses voltage-sensing DNA origami devices and efforts to mimic the FOF1 ATP synthase. A key highlight is the discovery that chiral DNA molecules can act as electromotors, rotating at billions of revolutions per minute when subjected to an electric field, due to ion flow in the grooves. This was confirmed by simulations and experiments, including with L-DNA. The speaker also explores the potential of DNA as an Archimedean screw, capable of pumping ions and water across a membrane when mechanically rotated. The presentation concludes with a discussion of a DNA turbine design in collaboration with other labs, which was experimentally observed to rotate in solid-state nanopores.

190 words

Critical Evaluation

Value of the Information & Strength of the Argument

The talk provides valuable insights into the design principles of synthetic membrane-embedded nanomachines, combining computational predictions with experimental validations. The argumentation is solid, grounded in peer-reviewed research and direct comparisons between simulation and experiment. The speaker clearly explains the physical mechanisms underlying the observed phenomena, such as the role of ion clouds in DNA rotation. He also acknowledges limitations and challenges, such as the difficulty of experimentally realizing some designs, which adds credibility.

Scientific Rigor, Source Quality, Title Accuracy

The presentation is scientifically rigorous, with a clear methodology and validation against experimental data. The speaker cites specific research papers and collaborations, though the talk does not provide a formal reference list. The title accurately reflects the content, focusing on building synthetic membrane-embedded nanomachines. The talk is an expert opinion based on original research, not a review or meta-analysis.

147 words

Title / Content Match

The title accurately reflects the content: a seminar on building synthetic membrane-embedded nanomachines using DNA origami and computational simulations.

Quality & Reliability

8/10

Presentation by a leading expert in computational biophysics, based on peer-reviewed research, with clear methodology and validation against experiments. Limitations acknowledged (e.g., predictions not yet realized).

Key Moments

Markers derived by PSI from the transcript: the creator did not define chapters.

Cited Sources

Build-a-Cell contact page — Mentioned for community contact.
Build-a-Cell seminar page — Mentioned as the seminar series page.

Concurring Sources

Build-a-Cell seminar page — The seminar series is a platform for presenting such research.

Contribution & Novelties

The talk presents novel computational and experimental findings on DNA-based nanomachines, including the discovery of DNA as an electromotor and a scramblase. It provides a detailed mechanistic understanding of these phenomena, which is a significant contribution to the field of synthetic biology.

Pour aller plus loin :

DNA origami — Foundational method for building nanoscale structures.
Molecular dynamics — Simulation technique used in the talk.
Scramblase — Biological enzyme that DNA nanopore mimics.

73 words

Radar Profile

The radar profile shows high scores in information quality, technical level, and reliability, with slightly lower scores in information quantity and global reliability. This indicates a technically dense and reliable presentation, but with a narrow focus and limited breadth.

Reliability 8/10