Slides:

Advertisements

Similar presentations

Proteins from Amino Acids

Advertisements

Proteins. What are Proteins? The most complex biological molecules Contain C, H, O and N Sometimes contain S May form complexes with other molecules containing.

Learning outcomes Describe the structure of an amino acid. Describe the formation and breakage of peptide bonds in the synthesis and hydrolysis of dipeptides.

Protein Structure & Function

© 2012 Pearson Education, Inc. Lecture by Edward J. Zalisko PowerPoint Lectures for Campbell Biology: Concepts & Connections, Seventh Edition Reece, Taylor,

Biology 107 Macromolecules II September 9, Macromolecules II Student Objectives:As a result of this lecture and the assigned reading, you should.

Biology 107 Macromolecules II September 8, 2003.

1. Primary Structure: Polypeptide chain Polypeptide chain Amino acid monomers Peptide linkages Figure 3.6 The Four Levels of Protein Structure.

Proteins Structures Primary Structure.

You Must Know How the sequence and subcomponents of proteins determine their properties. The cellular functions of proteins. (Brief – we will come back.

Daily Starter  Explain how a peptide bond is formed. (What is the reaction called and how does it happen?)

Homework for next week Green q 1,2,3 p29 Do evaluation points from Biuret Practical Revise test on all work next week Bring evidence you have revised please.

Doris Lee Even Zheng Joanna Tang Kiki Jang Rachel Zhang Vincent Ma.

Lesson 5.  Explain the term secondary structure  Explain the term tertiary structure.

(Chemistry Comes Alive)

BIOLOGY CONCEPTS & CONNECTIONS Fourth Edition Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Neil A. Campbell Jane B. Reece Lawrence.

Proteins (aka polypeptides)

STRUCTURAL ORGANIZATION

Objectives E – Recall the different structures of proteins and the test for proteins. C – Describe how a peptide bond is formed. Describe the different.

Molecules of Life II CHAPTER 3 Proteins Amino Acid Monomers Polypeptide (protein) Polymers Levels of Protein Structure Importance of Structure to Function.

PROTEINS. Learning Outcomes: B4 - describe the chemical structure of proteins List functions of proteins Draw and describe the structure of an amino acid.

Topic 3 The Neuronal Membrane at Rest Lange Biology Neurobiology.

Proteins Pgs Pgs Allosteric Enzymes  Allosteric enzymes have 2 sites. Active site of the enzyme Additional site where another substance.

PROTEIN FUNCTIONS. PROTEIN FUNCTIONS (continued)

BIOLOGICALLY IMPORTANT MACROMOLECULES PROTEINS. A very diverse group of macromolecules characterized by their functions: - Catalysts - Structural Support.

Amino Acids & Proteins The Molecules in Cells Ch 3.

Protein- Secondary, Tertiary, and Quaternary Structure.

1 Proteins Proteins are polymers made of monomers called amino acids All proteins are made of 20 different amino acids linked in different orders Proteins.

Protein Structure  The structure of proteins can be described at 4 levels – primary, secondary, tertiary and quaternary.  Primary structure  The sequence.

BIOLOGY CONCEPTS & CONNECTIONS Fourth Edition Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Neil A. Campbell Jane B. Reece Lawrence.

1 Proteins Read pgs , do #s Learning Goal: I will understand the 4 levels of organization of proteins (primary, secondary, tertiary & quaternary),

PROTEINS L3 BIOLOGY. FACTS ABOUT PROTEINS: Contain the elements Carbon, Hydrogen, Oxygen, and NITROGEN Polymer is formed using 20 different amino acids.

Proteins Structures and Functions. What? A series of amino acids in a polypeptide chain Produced from the coding in the DNA of the nucleus Makes up.

PROTEINS Proteins Composed mainly of –Carbon –Hydrogen –Nitrogen.

Protein S&F (Option C). 20 Amino Acids 4 Levels of Protein Organization Primary Structure – the number and sequence of amino acids in a polypeptide.

Functions Enzymes – organic catalysts Structural – skin, hair, muscle Antibodies Hormones.

Proteins Proteins are the building materials for the body.

Chapter Opener 2 © 2013 Pearson Education, Inc..

19.5 Protein Structure: Tertiary and Quaternary Levels

Four Levels of Protein Structure

Functional Variety of Proteins

Protein Proteins are found throughout living organisms.

Proteins What do we need proteins for?

Organic Compounds: Proteins

Protein Structures There are 4 protein structures.

19.4 Protein Structure: Primary and Secondary Levels

3.11 Proteins are essential to the structures and activities of life

(4) Genes and proteins in health and disease

Amino Acids and Proteins

Proteins Section 3.4.

Primary, secondary, tertiary and quaternary structures.

Proteins Basic structure of an amino acid

Triglyceride, or neutral fat 3 water molecules

. Nonpolar (hydrophobic) Nonpolar (hydrophobic) Amino Acid Side Chains

See Page 563 Essential amino acids must be obtained from the diet.

Diverse Macromolecules

Study Question: What are enzymes?

Protein Structure Chapter 14.

Organic Compounds (Cont.) Proteins and Nucleic Acids

Organic Compounds.

Proteins C, H, N, O, S 50% of the Dry Weight of Living Organisms

C-Notes: Proteins General Structure

Protein Structure.

Presentation transcript:

Figure 2.19 Levels of protein structure. Amino acid Amino acid Amino acid Amino acid Amino acid Primary structure: The sequence of amino acids forms the polypeptide chain. Secondary structure: The primary chain forms spirals (α-helices) and sheets (β-sheets). α-Helix:The primary chain is coiled to form a spiral structure, which is stabilized by hydrogen bonds. β-Sheet:The primary chain “zig-zags” back and forth forming a “pleated” sheet. Adjacent strands are held together by hydrogen bonds. Tertiary structure: Superimposed on secondary structure. α-Helices and/or β-sheets are folded up to form a compact globular molecule held together by intramolecular bonds. Tertiary structure of prealbumin (transthyretin), a protein that transports the thyroid hormone thyroxine in blood and cerebrospinal fluid. Quaternary structure: Two or more polypeptide chains, each with its own tertiary structure, combine to form a functional protein. Quaternary structure of a functional prealbumin molecule. Two identical prealbumin subunits join head to tail to form the dimer. © 2014 Pearson Education, Inc.