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Biochemistry Organic Compounds Name_______________________ Proteins (#3) or Date______________Per.____ “Life goes faster on Protein.” 1) Proteins (Elements: PSCHON) •Examples: _______________,__________________ •Ex: _________________, _________________ •Ex: _________________, ________________, _________________ Functions of Proteins Structural support: cacoons, webs, tendons,ligaments Storage: egg whites Enzymes: for digestion and to speed up life processes Transport: hemoglobin, proteins in cell membranes Fight infections: antibodies Some hormones: insulin Proteins: How They’re Made •Monomers are____________________! (4 units surround central carbon) •There are _______ different amino acids! Amino Acids Polymers: •Amino acids are joined by peptide bonds (________________________again!!) •Dipeptide (______ amino acids) •Polypeptide (_______amino acids) •What is produced each time they join?? _____________________ The ___________________ of amino acids determine the shape of the proteins! The shape determines_________________!! Denaturing •Denatured = ____________________ •Causes: ___________________, _____, _______________ concentration, and other environmental factors • Ex: ___________________ vs. ___________________ (meat, raw egg vs. boiled egg) Shape determines function… •If denatured or misshapen, it can’t ________________! Structure of Proteins Primary Structure is just the specific order of amino acids in the chain. Secondary Structures are either a helix or a pleated sheet formed form hydrogen bonds reacting between the amino acids Tertiary Structure occurs because of attractions between alpha helices and pleated sheets. Quaternary Structure is a protein consisting of more than one amino acid chain. To Summarize… PROTEINS (structure determines function!!) _____________________ structure (amino acid chain) _____________________ structure (helices, pleated sheets) _____________________ structure (bonds between side groups of peptide chain) _____________________ structure (bonds between two polypeptides) A protein is a very long chain of amino acids joined by ________ bonds by _________________ • Proteins take different SHAPE due to the ORDER of amino acids. This shape is TELLS the FUNCTION of the proteins! • When a protein loses its shape, it is said to be denatured and can no longer function in the same way as before.
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