PPT-Topic – Proteins-Amino Acids

Presented by Ms P H Giri Department of Microbiology Deogiri College Aurangabad BSc F Y Semester II Paper No V Basic Biochemistry Unit 3 Proteins Ms Priyanka H Giri. 2. Proteins. Proteins are polymers made of monomers called amino acids. All proteins are made of 20 different amino acids linked in different orders. Proteins are used to build cells, act as hormones & enzymes, and do much of the work in a cell. B.2. Properties of 2-amino acids . (B.2.2). Zwitterion. (dipolar) . amino acids contain both acidic and basic groups in the same molecule . therefore, are . amphoteric. in nature (capable of behaving as acids or bases). Amino . Acids. In a transamination reaction, . aspartate transaminase (AST) . catalyzes the reversible transfer of an amino group between glutamate and aspartate.. an . α. -amino group is transferred from an amino acid to an . amine group. Draw. a carboxylic acid group. Join. them together to form a molecule with an amine and . a carboxylic acid . group. Amino Acids. Building blocks of proteins. Two functional groups: a carboxylic acid and a primary amine. ). Dr. . Sumbul. . Fatma. Learning outcomes. What are the amino acids?. General structure.. Classification of amino acids.. Optical properties.. Amino acid configuration.. Non-standard amino acids.. . 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 . . . Amino acids are weak . polyprotic. acids . . Neutral amino acids are (. gly. , ala, threonine ) are treated as diprotic acids .. acidic amino acids (. glu. , asp,) are treated as . triprotic. acids .. 6. 6.1 Differentiate . between essential amino acids and nonessential amino acids.. 6.2 List . the functions of protein in the body.. 6.3 List . the steps for protein digestion and absorption in the body. . Each amino acid (aa) shares a common structure; i.e. an amine (NH. 2. ) group, an acid group (COOH), and a central carbon atom bonded to hydrogen and to a side chain (R).. The side chains qualify aas as acidic, basic, neutral, aromatic, and sulphur-containing amino acids.. Protein. Builds and repairs body tissue. Provides some energy. There are 4 calories per gram of protein. Protein. Composed of chains of amino acids. Common Amino Acids. Alanine. Glycine. Isoleucine. Leucine. Lecture :4. Dr. . Shaimaa. . Munther. Nutritionally Essential & Nutritionally Non Essential Amino Acids . Introduction: . As applied to amino acids, the terms "essential" and "nonessential" are misleading since all 20 common amino acids are essential to ensure health. . 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. Explain the formation . of a protein.. Classify proteins according to their chemical structure.. Describe the classification of protein.. Name a food source for the following proteins: albumin . caseinogen. Proteins are naturally-occurring biopolymers comprised of amino acids. . The biological function of proteins is inherent in their three dimensional structure.. All the information required for correct folding of the protein into its functional .