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https://hdl.handle.net/10316/113723
Título: | Ligand's Partition to the Lipid Bilayer Should Be Accounted for When Estimating Their Affinity to Proteins | Autor: | Moreno, Maria João Salvador, Armindo |
Palavras-chave: | binding affinity; partition coefficient; membrane proteins; lipid-protein ratio; ligand sequestration; ligand exclusion; protein specificity | Data: | 31-Mar-2023 | Editora: | MDPI | Projeto: | UIDB/04539/2020 UIDP/04539/2020 LA/P/0058/2020 UIDB/00313/2020 UIDP/00313/2020 |
Título da revista, periódico, livro ou evento: | Molecules | Volume: | 28 | Número: | 7 | Resumo: | Ligand-protein interactions are usually studied in complex media that also contain lipids. This is particularly relevant for membrane proteins that are always associated with lipid bilayers, but also for water-soluble proteins studied in in vivo conditions. This work addresses the following two questions: (i) How does the neglect of the lipid bilayer influence the apparent ligand-protein affinity? (ii) How can the intrinsic ligand-protein affinity be obtained? Here we present a framework to quantitatively characterize ligand-protein interactions in complex media for proteins with a single binding site. The apparent affinity obtained when following some often-used approximations is also explored, to establish these approximations' validity limits and to allow the estimation of the true affinities from data reported in literature. It is found that an increase in the ligand lipophilicity or in the volume of the lipid bilayer always leads to a decrease in the apparent ligand-protein affinity, both for water-soluble and for membrane proteins. The only exceptions are very polar ligands (excluded from the lipid bilayer) and ligands whose binding affinity to the protein increases supralinearly with ligand lipophilicity. Finally, this work discusses which are the most relevant parameters to consider when exploring the specificity of membrane proteins. | URI: | https://hdl.handle.net/10316/113723 | ISSN: | 1420-3049 | DOI: | 10.3390/molecules28073136 | Direitos: | openAccess |
Aparece nas coleções: | IIIUC - Artigos em Revistas Internacionais I&D CNC - Artigos em Revistas Internacionais I&D CQC - Artigos em Revistas Internacionais FCTUC Química - Artigos em Revistas Internacionais |
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Ficheiro | Descrição | Tamanho | Formato | |
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Ligands-Partition-to-the-Lipid-Bilayer-Should-Be-Accounted-for-When-Estimating-Their-Affinity-to-ProteinsMolecules.pdf | 2.73 MB | Adobe PDF | Ver/Abrir |
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