BIOL 3090 : CHAPTER 3 Protein Structure And Function (got 94% in the course)

• School: LSU
• Department: Biological Sciences
• Course: BIOL 3090
• Professor: All

Document Summary

Short polymers formed by the ordered linking of amino acids. 2 molecules goes through dehydration reaction and a covalent bond (peptide bond) is formed: a small peptide of five amino acids (count the alpha cs) (fig 3-b, peptide- short chain of amino acids (2-30 residues), polypeptide. Longer chain (up to 4000: protein. A polypeptide that has folded into a specific formation. Levels of protein structure: primary structure: linear sequence of amino acids, specific amino acid sequence contains all the intrinsic information on how a protein folds into its 3d structure, secondary structure, alpha ( ) helix. Carbonyl o is h-bonded to an amide nitrogen four peptide bonds downstream. R groups (side chains) don"t contribute directly. All the carbonyl groups are pointed down, all the amide nitrogens are pointed up. These carbonyls and amides have partial charges (- and +, respectively). Thus, the alpha helix has a dipole.