Dna Protein Structures
Dna Protein Structures - Related Videos
03:06
From DNA to Protein
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2020
The flow of genetic information in cells from DNA to mRNA to protein is described by the central dogma, which states that genes specify the sequence of mRNAs, which in turn specify the sequence of amino acids making up all proteins. The decoding of one molecule to another is performed by specific proteins and RNAs. Because the information stored in DNA is so central to cellular function, it makes intuitive sense that the cell would make mRNA copies of this information for protein synthesis...
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...
05:13
Isolation of Proteins from Viral DNA-protein Complexes
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2026
Source: Dembowski, J. A., et al. Purification of Viral DNA for the Identification of Associated Viral and Cellular Proteins. J. Vis. Exp. (2017).This video demonstrates the isolation of protein–viral DNA complexes from cell nuclei using click chemistry and magnetic bead purification. The protocol involves labeling viral genomes with alkyne-modified nucleotides, biotinylation via a click reaction, and binding to streptavidin-coated magnetic beads. Following washing and heat elution, the purified...
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...
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Stability comes from several complementary contacts acting together. Basic amino acids can attract the negatively charged phosphate backbone, while hydrogen bonds and sequence-specific contacts provide additional recognition. This combination allows proteins to bind DNA in defined arrangements rather than through charge alone, helping explain how genetic material is packaged, replicated, repaired, or regulated.
Sequence-specific contacts allow a protein to recognize particular DNA regions instead of binding indiscriminately across the molecule. That selectivity is especially important for transcription factors controlling immune genes and for proteins that identify pathogen-derived DNA. Structural information can therefore connect the position of a protein on DNA with a specific regulatory or recognition function.
Bending or wrapping changes the three-dimensional presentation of DNA and can organize it into arrangements suited to protein recognition or packaging. These structural changes help explain how proteins gain access to particular genetic regions and how DNA can be compactly organized. In infection research, such arrangements also provide a framework for examining how microbial proteins interact with host genetic material.
Structures involving transcription factors show how immune-regulatory proteins contact DNA and recognize the regions associated with gene control. Hydrogen bonds, electrostatic attraction, and sequence-specific contacts help define these interactions. Examining the resulting arrangement can clarify how genetic information is regulated in immune cells and how altered protein-DNA recognition might affect immune responses.
They can show how immune proteins recognize pathogen-derived DNA at the molecular level. The location and nature of contacts indicate how proteins distinguish and bind genetic material from infectious sources. This structural context helps connect physical recognition events with immunology and infection research, where identifying pathogen DNA is relevant to understanding host responses.
Structural analysis can clarify how viral or bacterial proteins interact with and manipulate host DNA. By revealing the contacts and three-dimensional arrangements involved, it helps researchers relate microbial protein binding to changes in genetic-material organization or regulation. These insights support infection-focused investigations and can contribute to the development of diagnostics and targeted therapeutics.