Protein Conformational Changes
Protein Conformational Changes - Related Videos
01:20
Conformity
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2020
Conformity is the change in a person’s behavior to go along with the group, even if that person does not agree with the group. Asch’s Original Study Solomon Asch conducted several experiments in the 1950s to determine how people are affected by the thoughts and behaviors of other people. In one study, a group of participants was shown a series of printed line segments of different lengths: a, b, and c. Participants were then shown a fourth line segment: x. They were asked to identify which...
08:13
Differential Scanning Calorimetry — A Method for Assessing the Thermal Stability and Conformation of Protein Antigen
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Cited by 117 •
2017
Differential scanning calorimetry measures the thermal transition temperature(s) and total heat energy required to denature a protein. Results obtained are used to assess the thermal stability of protein antigens in vaccine formulations.
08:55
A Minority of One: Conformity to Group Norms
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2023
Source: William Brady & Jay Van Bavel—New York University It is obvious that we are influenced by those around us, but in the early to mid 1900's, psychologists began to study how potent social influence can be on our thoughts and behaviors. Motivated in part by attempts to explain the behaviors of Nazi soldiers in World War II, one topic of considerable interest at the time in psychology was conformity, the phenomenon in which people match their attitudes, behaviors, or beliefs to group...
10:02
Submillisecond Conformational Changes in Proteins Resolved by Photothermal Beam Deflection
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Cited by 1 •
2014
Here we report an application of the photothermal beam deflection technique in combination with a caged calcium compound, DM-nitrophen, to monitor microsecond and millisecond dynamics and energetics of structural changes associated with the calcium association to a neuronal calcium sensor, Downstream Regulatory Element Antagonist Modulator.
10:37
Spatial Separation of Molecular Conformers and Clusters
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Cited by 3 •
2014
We present a technique that allows the spatial separation of different conformers or clusters present in a molecular beam. An electrostatic deflector is used to separate species by their mass-to-dipole moment ratio, leading to the production of gas-phase ensembles of a single conformer or cluster stoichiometry.
FAQs
A protein changes shape when interactions that stabilize its three-dimensional structure are disrupted and reorganized. These noncovalent forces help determine which structural state is favored, so even a change in molecular contacts can alter the protein’s accessibility and activity. The resulting transition may expose an active site, modify molecular recognition, or transmit a signal to another part of the cell.
Ligand binding and post-translational modification can shift a protein between structural states by changing its internal molecular interactions. A ligand may promote a shape that exposes or conceals an active site, whereas a modification can reorganize the structure in a way that changes recognition or signaling. These mechanisms allow cellular conditions to regulate protein function without producing an entirely different protein.
Changes in pH or temperature can disturb the noncovalent forces that maintain a protein’s structure, favoring a different conformation. The resulting state may support a new activity, alter molecular interactions, or contribute to persistent structural disruption. Considering these conditions is therefore important when interpreting how a protein behaves in experiments or in biological environments.
These structural transitions support several major biological processes, including enzyme catalysis, cellular communication, transport, and assembly into larger molecular complexes. A change in shape can position an active site for catalysis, alter recognition between molecules, or transmit information through a signaling pathway. Consequently, conformational behavior links a protein’s structure to its specific cellular role.
Studying these transitions can reveal how proteins switch between functional states and how structural changes control activity or molecular recognition. Such analysis helps connect protein behavior with enzyme function, signaling, transport, and complex assembly. It also provides a framework for examining how altered conformations contribute to protein misfolding and other disease-related mechanisms.
Persistent or improperly regulated structural states can help explain protein misfolding and disease mechanisms. Understanding the transitions also identifies structural features that control activity, recognition, or signaling, making them relevant therapeutic targets. In structure-based drug design, this knowledge can guide efforts to develop compounds that influence a protein’s functional state or its interactions with other molecules.