• Port-a-Patch

    Smallest patch clamp setup in the world
  • Port-a-Patch

    Easy to learn - ideal for teaching
  • Port-a-Patch

    Records from cells, organelles and bilayers
  • Port-a-Patch

    First planar patch clamp device on the market
  • Port-a-Patch

    Ideal for internal solution exchange applications

2020 - Ionophore constructed from non-covalent assembly of a G-quadruplex and liponucleoside transports K+-ion across biological membranes

icon pap  Port-a-Patch and   icon vpp   Vesicle Prep Pro publication in Nature Communications (2020)

Authors: 
Debnath M., Chakraborty S., Kumar Y.P., Chaudhuri R., Jana B., Dash J.

Journal: 
Nature Communications (2020) 11, Article number: 469


Abstract: 

The selective transport of ions across cell membranes, controlled by membrane proteins, is critical for a living organism. DNA-based systems have emerged as promising artificial ion transporters. However, the development of stable and selective artificial ion transporters remains a formidable task. We herein delineate the construction of an artificial ionophore using a telomeric DNA G-quadruplex (h-TELO) and a lipophilic guanosine (MG). MG stabilizes h-TELO by non-covalent interactions and, along with the lipophilic side chain, promotes the insertion of h-TELO within the hydrophobic lipid membrane. Fluorescence assays, electrophysiology measurements and molecular dynamics simulations reveal that MG/h-TELO preferentially transports K+-ions in a stimuli-responsive manner. The preferential K+-ion transport is presumably due to conformational changes of the ionophore in response to different ions. Moreover, the ionophore transports K+-ions across CHO and K-562 cell membranes. This study may serve as a design principle to generate selective DNA-based artificial transporters for therapeutic applications.


Download here

Back to Overview

We use cookies on our website. Some of them are essential for the operation of the site, while others help us to improve this site and the user experience (tracking cookies). You can decide for yourself whether you want to allow cookies or not. Please note that if you reject them, you may not be able to use all the functionalities of the site.