Protein2 - Proteins Protein structure Proteins are...

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Proteins Protein structure Proteins are folded/twisted chains of amino acids Proteins have 50 or more amino acids; polypeptides 10-50, peptides less than 10 o These different categories are used very loosely in real life Levels of protein structure (increasing degrees of structural complexity) o Primary - sequence of amino acids (determined by shape) o Secondary - folded (pleated sheets), twisted (helices) version of primary structure o Tertiary - folded and/or twisted version of secondary structure o Quaternary (optional) - combination of two or more tertiary proteins Chaperone molecules assist proteins in folding properly o The proper (functioning) shape of a protein is called its "native state" Denaturation is loss of proper 3D shape (native state) o May be caused by extreme temp, extreme pH, chemical reactions, other extreme conditions o Renatured proteins are those that have regained their native state after having been previously denatured o Chaperone molecules may assist in refolding denatured proteins
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Protein2 - Proteins Protein structure Proteins are...

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