Mass spectrometric analysis of protein–ligand interactions
نویسندگان
چکیده
The interactions of small molecules with proteins (protein-ligand interactions) mediate various biological phenomena including signal transduction and protein transcription and translation. Synthetic compounds such as drugs can also bind to target proteins, leading to the inhibition of protein-ligand interactions. These interactions typically accompany association-dissociation equilibrium according to the free energy difference between free and bound states; therefore, the quantitative biophysical analysis of the interactions, which uncovers the stoichiometry and dissociation constant, is important for understanding biological reactions as well as for rational drug development. Mass spectrometry (MS) has been used to determine the precise molecular masses of molecules. Recent advancements in MS enable us to determine the molecular masses of protein-ligand complexes without disrupting the non-covalent interactions through the gentle desolvation of the complexes by increasing the vacuum pressure of a chamber in a mass spectrometer. This method is called MS under non-denaturing conditions or native MS and allows the unambiguous determination of protein-ligand interactions. Under a few assumptions, MS has also been applied to determine the dissociation constants for protein-ligand interactions. The structural information of a protein-ligand interaction, such as the location of the interaction and conformational change in a protein, can also be analyzed using hydrogen/deuterium exchange MS. In this paper, we briefly describe the history, principle, and recent applications of MS for the study of protein-ligand interactions.
منابع مشابه
Combining Chemical Cross-linking and Mass Spectrometry of Intact Protein Complexes to Study the Architecture of Multi-subunit Protein Assemblies
Proteins interact with their ligands to form active and dynamic assemblies which carry out various cellular functions. Elucidating these interactions is therefore fundamental for the understanding of cellular processes. However, many protein complexes are dynamic assemblies and are not accessible by conventional structural techniques. Mass spectrometry contributes to the structural investigatio...
متن کاملMapping protein-protein interactions by affinity-directed mass spectrometry.
A precise and rapid method for identifying sites of interaction between proteins was demonstrated; the basis of the method is direct mass spectrometric readout from the complex to determine the specific components of the proteins that interact--a method termed affinity-directed mass spectrometry. The strategy was used to define the region of interaction of a protein growth factor with a monoclo...
متن کاملGPCR proteomics: mass spectrometric and functional analysis of histamine H1 receptor after baculovirus-driven and in vitro cell free expression.
The human histamine H1 Receptor (hH1R) belongs to the family of G-protein coupled receptors (GPCRs), an attractive and proven class of drug targets in a wide range of therapeutic areas. However, due to the low amount of available purified protein and the hydrophobic nature of GPCRs, limited structural information is available on ligand-receptor interaction especially for the transmembrane (TM) ...
متن کاملStructural identification and quantification of β-amyloid polypeptide-ligand interactions using affinity-mass spectrometric methods
متن کامل
Chemical cross-linking and mass spectrometry to map three-dimensional protein structures and protein-protein interactions.
Closely related to studying the function of a protein is the analysis of its three-dimensional structure and the identification of interaction sites with its binding partners. An alternative approach to the high-resolution methods for three-dimensional protein structure analysis, such as X-ray crystallography and NMR spectroscopy, consists of covalently connecting two functional groups of the p...
متن کامل