Characterization of DNA bound cyclic GMP-AMP synthase using atomic force microscopy imaging
Related Experiment Video
Updated: Jan 20, 2026

Bacterial Immobilization for Imaging by Atomic Force Microscopy
Published on: August 10, 2011
Alexander Lushnikov1, Richard Hooy2, Jungsan Sohn2
1Nanoimaging Core Facility at the University of Nebraska Medical Center, Omaha, NE, United States.
Abstract:
The protocol described herein allows for acquiring topography images of DNA-protein complexes using Atomic Force Microscopy imaging. Since the very beginning of this method, AFM has been an indispensable tool for characterization of biomolecular complexes with exceptional capability of observing single complexes. This method can visualize structural characteristics of DNA-protein assemblies and evaluate differences between individual complexes. Although this protocol is generally applicable to a large number of various proteins complexed with DNA, we use cyclic G/AMP synthase (cGAS) enzyme as a case study for the protocol description.
Related Concept Videos
Atomic Force Microscopy
The AFM Probe
The probe is regarded as the heart of any AFM setup and comprises the...
Atomic Orbitals
Intermolecular Forces
Cascaded Op Amps
In a cascaded system, each op-amp is referred to as a stage. The output of one stage drives the input of the subsequent stage. As the input signal passes through...
Second-order Op Amp Circuits
The analysis of such circuits follows a systematic approach, similar to the second-order RLC circuits. In practical scenarios, bulky inductors are rarely employed due to their size and weight. This means...
The Energies of Atomic Orbitals

