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Updated: May 30, 2026
09:35
Real Time Measurements of Membrane Protein:Receptor Interactions Using Surface Plasmon Resonance (SPR)
Published on: November 29, 2014
Environment sensing and response mediated by ABC transporters
Sarah E Giuliani1, Ashley M Frank, Danielle M Corgliano
1Biosciences Division, Argonne National Laboratory, Lemont, IL 60490, USA.
BMC Genomics
|August 4, 2011
Summary
Researchers identified specific ligands for 64% of ATP-binding cassette (ABC) transporter proteins in Rhodopseudomonas palustris. This advances understanding of microbial metabolism and transporter function.
Area of Science:
- Microbiology
- Biochemistry
- Molecular Biology
Background:
- Transporter proteins are crucial for organism-environment interactions, mediating metabolism and signaling.
- Current functional annotation of transporters is often limited to broad family classifications.
- Mapping specific ligands to transporters enhances understanding of their roles in cellular responses.
Purpose of the Study:
- To improve functional annotation of ATP-binding cassette (ABC) transporters.
- To characterize ligand-binding specificity of solute binding proteins from Rhodopseudomonas palustris.
Main Methods:
- Expression and purification of ABC transporter solute binding proteins.
- Utilized ligand libraries of environmental and cellular metabolic compounds.
- Employed fluorescence thermal shift-based high-throughput ligand binding screens.
Main Results:
- Identified specific binding ligands for approximately 64% of screened proteins.
- Ligand collection reflects common bacterial functionalities and R. palustris-specific capabilities.
- Specific ligands were assigned to ABC transporter periplasmic binding subunits.
Conclusions:
- Functional screening provides unique insights into R. palustris metabolic capabilities and ecological niche.
- Improved annotation of related organisms is possible using these findings.
- Offers a pathway to evaluate the evolution of diverse transporter proteins.
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