Ch 3 Carbon Atoms and Molecules Rutgers bio 101 pg 11

Ch 3 Carbon Atoms and Molecules Rutgers bio 101 pg 11 -...

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Peptide Bonds The covalent carbon to nitrogen bond linkin two amino acids is a peptide bond. When two amino acids combine, a dipeptide is formed; longer ones are polypeptide. Globular proteins are polypeptide chains that are tightly folded into compact, roughly spherical shapes. Four main levels of Protein Organization Primary structure- sequence of amino acids, joined by peptide bonds. Higher levels derive from the primary structure. Secondary structure- two most common types alpha helix [fibers of wool, hair, skin nails]: hydrogen bonds can be broken, fibers stretch under tension beta pleated sheet- strong, flexible, not elastic. Tertiary structure- overall shape assumed by each individual polypeptide chain. Quaternary structure-The overall conformation of a protein produced by the interaction of two or more polypeptide chains. Molecular Chaperones-Proteins that help other proteins fol properly. Although not dictating the folding pattern, chaperones make the process more efficient. Domain-A structural and functional region of a protein.
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Ch 3 Carbon Atoms and Molecules Rutgers bio 101 pg 11 -...

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