CHEM 2301 Lecture 18: Ch4 study guide_F14
Document Summary
Study guide for chapter 4, protein structure and function. Structural proteins provide support and organize compartments. Transport proteins carry small molecules from one compartment to another. Motor proteins move larger components within cells or execute cellular movements. Storage proteins store molecules needed for growth and development. Signaling proteins mediate communication within and between cells. Receptor proteins receive signals and transmit them to intracellular targets. Gene regulatory proteins bind dna and turn genes on or off. Proteins execute most cell functions (panel 4- 1) A protein or polypeptide is a long chain of amino acids linked together by covalent peptide bonds (figure 4. 2) The side chain gives each amino acid its unique properties. These non- covalent bonds are relatively weak, and so the stability of the folded protein depends on many non- covalent bonds. The function of a protein depends on the detailed structure of its 3- dimensional shape. Shape and structure of proteins.
