Protein 3d Structure
Protein 3d Structure - Related Videos
13:43
Correlative Microscopy for 3D Structural Analysis of Dynamic Interactions
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Cited by 15 •
2013
We describe a correlative microscopy method that combines high-speed 3D live-cell fluorescent light microscopy and high-resolution cryo-electron tomography. We demonstrate the capability of the correlative method by imaging dynamic, small HIV-1 particles interacting with host HeLa cells.
01:56
Structural Protein Function
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2020
Structural proteins are a category of proteins responsible for functions ranging from cell shape and movement to providing support to major structures such as bones, cartilage, hair, and muscles. This group includes proteins such as collagen, actin, myosin, and keratin. Collagen, the most abundant protein in mammals, is found throughout the body. In connective tissue, such as skin, ligaments, and tendons, it provides tensile strength and elasticity. In bones and teeth, it mineralizes to form...
08:00
Imaging and 3D Reconstruction of Cerebrovascular Structures in Embryonic Zebrafish
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Cited by 1 •
2014
Imaging of cerebrovascular development in larval zebrafish is described. Techniques to facilitate 3D imaging and modify cerebrovascular development using chemical treatments are also provided.
22:00
Crystallizing Membrane Proteins for Structure Determination using Lipidic Mesophases
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Cited by 48 •
2010
Herein is described the procedure implemented in the Caffrey Membrane Structural and Functional Biology Group to set up manually crystallization trials of membrane proteins in lipidic mesophases.
02:39
Protein and Protein Structure
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2026
Proteins are one of the most abundant organic molecules in living systems and have the most diverse range of functions of all macromolecules. Proteins may be structural, regulatory, contractile, or protective. They may serve in transport, storage, or membranes; or they may be toxins or enzymes. Their structures, like their functions, vary greatly. They are all, however, amino acid polymers arranged in a linear sequence.A protein's shape is critical to its function. For example, an enzyme can...
FAQs
Folding is governed by the combined effects of hydrogen bonding, ionic interactions, hydrophobic effects, and disulfide bonds. These forces stabilize particular arrangements of the amino acid chain rather than acting independently. Their balance helps determine the resulting structural organization, which in turn influences how the protein behaves and interacts with other substances.
These levels describe progressively organized aspects of a protein’s architecture. Secondary and tertiary structures contribute to the arrangement of one amino acid chain, while quaternary structure appears in some proteins when multiple organized components are associated. Distinguishing these levels helps explain why proteins can have different structural arrangements and consequently different chemical behavior.
Environmental conditions can influence the interactions that maintain a protein’s three-dimensional arrangement. Changes in pH, temperature, or solvent composition may therefore produce conformational changes, meaning alterations in molecular shape. Examining these effects helps chemists connect a protein’s structural stability with changes in its behavior under different experimental or biological conditions.
The precise placement of atoms creates structural features that affect how a protein interacts with other substances. Those features help explain catalysis, in which a protein supports a chemical reaction, and molecular recognition, in which it interacts selectively with another substance. Structural analysis therefore links atomic arrangement with chemical activity and interaction behavior.
Structural information can guide drug design by revealing the molecular arrangement responsible for interactions with other substances. Chemists can use that information to interpret how candidate compounds relate to a protein’s structure and behavior. This application connects three-dimensional analysis with efforts to design substances that influence protein function through molecular recognition.
Comparing protein structures can help researchers interpret how a mutation may affect molecular arrangement, stability, or function. The same structural perspective supports biomolecular engineering by connecting deliberate changes in a protein with its resulting behavior. These applications use chemistry-based structural information to understand or modify proteins without treating sequence changes as isolated events.