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Biology Lecture 8 - protein and van der Waals interactions...

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Biology Lecture 8 Memorize cysteine amino acid Primary structure is determined by the amino acid sequence Determined by inherited info (DNA) Contains peptide bonds Secondary structure is the folds and coils in the polypeptide chain Results from hydrogen bonds between components of the backbone Two types are alpha helix and beta pleated sheet Tertiary structure are made by interactions of the R group Determined by WEAK and STRONG interactions between R groups Some of the WEAK interactions include: hydrogen bonds, ionic bonds, hydrophobic interactions (R groups are excluded and forced into the middle of the
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Unformatted text preview: protein), and van der Waals interactions STRONG bonds include: covalent bonds called disulfide bridges (may reinforce the protein’s structure Quaternary structure results when multiple polypeptide chains come together to form a larger molecule Examples include collagen and hemoglobin Oxygen and nitrogen have partial negative charges and hydrogen has a partial positive charge. This causes the hydrogen bonds that result in secondary structure Mutation in the DNA can cause problems in the protein structure...
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