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Fluorescence Anisotropy as a Tool to Study Protein-protein Interactions
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Biología estructural: análisis de la cooperatividad de plegamiento de proteínas

Zheng Zhou1, Yawen Bai

  • 1Laboratory of Biochemistry and Molecular Biology, Center for Cancer Research, NCI, NIH, Building 37, Room 6114E, Bethesda, Maryland 20892, USA. yawen@helix.nih.gov

Nature
|February 16, 2007
PubMed
Resumen

El plegamiento de pequeñas proteínas suele ser cooperativo. Sin embargo, un nuevo análisis sugiere que la proteína Naf-BBL rediseñada se despliega a través de un proceso de dos estados, consistente con los principios de plegado todo o nada.

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Protein Organization01:24

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Proteins are polymers of amino acid residues. They are versatile and responsible for different cellular functions, including DNA replication, molecular transport, catalysis, and structural support. Proteins have a hierarchical structure comprising at least three levels of organization: primary, secondary, and tertiary structure. Some large proteins have a quaternary structure where individual protein subunits are linked together.
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Proteins are chains of amino acids linked together by peptide bonds. Upon synthesis, a protein folds into a three-dimensional conformation, critical to its biological function. Interactions between its constituent amino acids guide protein folding, and hence the protein structure is primarily dependent on its amino acid sequence.
Protein Structure Is Critical to Its Biological Function
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Protein Organization01:24

Protein Organization

Proteins are polymers of amino acid residues. They are versatile and responsible for different cellular functions, including DNA replication, molecular transport, catalysis, and structural support. Proteins have a hierarchical structure comprising at least three levels of organization: primary, secondary, and tertiary structure. Some large proteins have a quaternary structure where individual protein subunits are linked together.
The primary structure of a protein is its amino acid sequence.