PPT-Amino Acids, Peptides and

Proteins Part I Dr Ravish Chauhan Associate Professor IGN College Ladwa Amino Acids These are the compounds which contain both amino and carboxylic group. Peptide Bond. Amino acid residues in peptides and proteins are linked together through a covalent bond called the peptide bond.. Two amino acid molecules can be covalently joined through a substituted amide linkage, termed a . CHAPTER 3, Part 1 . Amino Acids and Peptides . To know the structure and naming of all 20 protein amino acids. To know the structure and properties of peptides and the particularly the structure of the peptide bond.. Unit objectives:. Identify amino acid classifications based on nutritional use and chemical properties of side chains. Describe the primary, secondary, tertiary and quaternary structures of proteins. Part 1 - Amino Acids. Structure and Chemistry. Building Blocks of Proteins. Essential Amino Acids. Basic Structure. Stereochemistry. Side Chain Chemistry. Properties. Ionization. Bonding. Amino Acids & Proteins. . are organic molecules that are the building block of . . proteins. .. -There is 20 . α. -amino acids commonly found in . proteins. . ( . they . have a carboxyl group and an amino group . . . A. PHYSICAL PROPERTIES. Optical properties: . All amino acids except glycine possess optical isomers due to the presence of asymmentric carbon atom. Some amino acids have a second assymmentric carbon e.g. isoleucine, threonine.. A . peptide bond . is an amide bond that forms when the —. . COO. −. group of one amino acid reacts with the —. . NH. 3. +. group of the next amino acid.. The linking of two or more amino acids by peptide bonds forms a . Peptide bond formation. : . α-carboxyl group of one amino acid (with side chain R1) forms a covalent peptide bond with α-amino group of another amino acid . ( . with the side chain R2) by removal of a molecule of water. The result is : Dipeptide ( i.e. Two amino acids linked by one peptide bond). By the same way, the dipeptide can then forms a second peptide bond with a third amino acid (with side chain R3) to give . Amino Acids are the building units of proteins.. The main role of amino acids is in the synthesis of structural and functional . proteins.. The . non-essential amino acids are either derived from the. A. . Peptides. are compounds, formed of less . than . 50 . amino acids . linked together by peptide bonds.. 1.. . Dipeptide. (2 amino acids and one peptide bond).. 2.. . Tripeptide. (3 amino acids and two peptide bonds).. BSc 3. rd. year . AMINO ACIDS. C. lassification of amino acids . Classification according to nature of side chain. PREPARATION OF AMINO ACIDS. 1. Gabriel Phthalimide synthesis. 2. Strecker’s synthesis.  . Constantinos. Avraamides . 1. , . Spyridoula. . Diavoli. . 1. , Ariana Robertson . 2. , Manos Vlasiou . 1. , Elena . Mourelatou. . 1. ,. Christos Petrou . 1. , Yiannis Sarigiannis *. 1. 1. Department of Life & Health Sciences, University of Nicosia, Nicosia, Cyprus. Assistant Professor. Department of Botany. BIOACTIVE PEPTIDES. CONTENT. INTRODUCTION. PROTEIN. PEPTIDES. BIOACTIVE PEPTIDES. PRODUCTION OF BIOACTIVE PEPTIDES. ENZYMZTIC DIGESTION. EFFECTS ON HEALTH AND RESOURCE. Two or more amino acids covalently joined by . . . peptide bonds. .. Two . amino acid molecules can be covalently joined by . . peptide . bond to yield dipeptide.. This . linkage is formed by removal of the element of H.