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Updated: Jul 5, 2026
08:32
Application of Genetically Encoded Fluorescent Nitric Oxide (NO•) Probes, the geNOps, for Real-time Imaging of NO• Signals in Single Cells
Published on: March 16, 2017
Nitric oxide reactivity with globins as investigated through computer simulation.
Marcelo A Marti1, Luciana Capece, Axel Bidon-Chanal
1Departamento de Química Inorgánica, Analítica y Química Física/INQUIMAE-CONICET, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Buenos Aires, Argentina.
Methods in Enzymology
|April 25, 2008
Summary
Atomistic simulations explore nitric oxide (NO) reactivity with globins. Computational methods reveal insights into protein flexibility, ligand binding, and NO interactions, aiding drug design.
Area of Science:
- Biophysics
- Computational Chemistry
- Biochemistry
Background:
- Nitric oxide (NO) plays crucial roles in various physiological processes.
- Understanding NO interactions with proteins like globins is essential for deciphering biological mechanisms.
- Atomistic simulations offer powerful tools for investigating these complex molecular interactions.
Purpose of the Study:
- To review and present atomistic simulation tools for studying nitric oxide reactivity with globins.
- To explore various simulation strategies, including classical and quantum-mechanical approaches.
- To investigate structural flexibility, ligand migration, and NO binding in truncated hemoglobin N.
Main Methods:
- Classical molecular dynamics (MD) simulations: standard MD, essential dynamics, umbrella sampling, multiple steering MD.
- Novel techniques for protein energy landscape exploration.
- Hybrid quantum-classical (QM/MM) schemes for binding energies and reactivity.
- Case study: Truncated hemoglobin N from Mycobacterium tuberculosis.
Main Results:
- Detailed analysis of structural flexibility and ligand migration pathways within globins.
- Quantification of oxygen affinity and NO binding characteristics.
- Insights into the chemical reactivity of globins with nitric oxide.
Conclusions:
- Atomistic simulations, both classical and QM/MM, are effective for studying NO-globin interactions.
- These methods provide valuable information on protein dynamics, ligand binding, and reactivity.
- Findings contribute to understanding NO signaling and developing targeted therapeutics.
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