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

Slides:

Advertisements

Similar presentations

Proteins from Amino Acids

Advertisements

1.The amino acid monomer. Spot the similarity.

Pages 42 to 46.  Chemical composition  Carbon  Hydrogen  Oxygen  Nitrogen  Sulfur (sometimes)  Monomer/Building Block  Amino Acids (20 different.

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

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

Polypeptides – a quick review A protein is a polymer consisting of several amino acids (a polypeptide) Each protein has a unique 3-D shape or Conformation.

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.

AMINO ACIDS AND PROTEINS

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

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

Week 1, Quiz 3 – Are you ready?. 1. Is less dense than water. 2. Is a polar substance. 3. Is more dense than water. 4. Is a nonpolar substance. Countdown.

Proteins Major group of biological molecules. Proteins Monomers: amino acids ▫Always contain an amino group and carboxylic acid group Polymers: peptides.

 All amino acids have a common structure, but differ in their R groups.  The asymmetric carbon must have the four attachments in a particular order.

3-Dimensional Structure of Proteins 4 levels of protein structure:

Topic 7.5 Proteins (AHL).

Chapter 3 Protein Structure and Function. Key Concepts Most cell functions depend on proteins. Amino acids are the building blocks of proteins. Amino.

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

Proteins & DNA. Amino Acids: the building blocks of Proteins.

Mrs. Einstein Research in Molecular Biology. Importance of proteins for cell function: Proteins are the end product of the central dogma YOU are your.

Macromolecules Part 3 Proteins. Proteins! Functions of Proteins – Structural support – Storage – Transport – Cellular communications – Movement – Defense.

Protein Structure (Foundation Block) What are proteins? Four levels of structure (primary, secondary, tertiary, quaternary) Protein folding and stability.

©1999 Timothy G. Standish Bielkoviny, enzýmy Protein Structure Július Cirák.

PROTEINS The final product of the DNA blueprint Hemoglobin.

PROTEIN FUNCTIONS. PROTEIN FUNCTIONS (continued)

Intended Learning Objectives You should be able to… 1. Give 3 examples of proteins that are important to humans and are currently produced by transgenic.

Amino Acids & Proteins The Molecules in Cells Ch 3.

Protein- Secondary, Tertiary, and Quaternary Structure.

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

Proteins Clicker. The molecules marked “W” are best described as: 1.Monomers 2.Polymers 3.Isomers 4.isotopes.

Levels of Protein Structure. Why is the structure of proteins (and the other organic nutrients) important to learn?

Protein Structure. Insulin Infinite variety The number of possible sequences is infinite An average protein has 300 amino acids, At each position there.

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

Levels of Protein Structure. Why is the structure of proteins (and the other organic nutrients) important to learn?

Amino Acids. Amino acids are used in every cell of your body to build the proteins you need to survive. Amino Acids have a two-carbon bond: – One of the.

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.

Structural organization of proteins

Mir Ishruna Muniyat. Primary structure (Amino acid sequence) ↓ Secondary structure （ α -helix, β -sheet ） ↓ Tertiary structure （ Three-dimensional.

Four Levels of Protein Structure

Chapter 5 Proteins.

Proteins Primary structure: Amino acids link together to form a linear polypeptide. The primary structure of a protein is a linear chain of amino acids.

Structures of Proteins and Denaturation

Protein Structures There are 4 protein structures.

The heroic times of crystallography

Amino Acids and Proteins

Protein Synthesis and Protein Folding

Proteins – V2.

Protein Structure Amino Acids Polypeptide Levels of Structure

Protein Structure and Function

Protein Structure and Examples

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

3. Proteins Monomer = Amino acids Globular in shape Or Spherical.

The Chemistry of Life Proteins

Diverse Macromolecules

Enzymes and Proteins.

Proteins: Secondary Structure Alpha Helix

Chapter 19: Proteins.

Protein Structure Chapter 14.

بیوشیمی : پروتئین ها و لیپیدها

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

PROTEINS, The Stuff of Life.

Protein Structure and Examples

Four Levels of Protein Structure

Presentation transcript:

. Nonpolar (hydrophobic) Nonpolar (hydrophobic) Amino Acid Side Chains Nonpolar (hydrophobic) Nonpolar (hydrophobic) . Nonpolar (hydrophobic) Polar Polar Polar FIGURE 22.1 The 20 amino acids that are the building blocks of proteins can be classified as (a ) nonpolar (hydrophobic), (b ) polar but neutral, (c ) acidic, or (d ) basic. Also shown here are the one-letter and three-letter codes used to denote amino acids. For each amino acid, the ball-and-stick (left) and space-filling (right) models show only the side chain. Acidic YOU MUST DEPROTENATE Acidic YOU MUST DEPROTENATE Figure 22-1 p595

Polar Polar Amino Acid Side Chains Nonpolar (hydrophobic) Nonpolar (hydrophobic) Polar Polar Polar Basic FIGURE 22.1 The 20 amino acids that are the building blocks of proteins can be classified as (a ) nonpolar (hydrophobic), (b ) polar but neutral, (c ) acidic, or (d ) basic. Also shown here are the one-letter and three-letter codes used to denote amino acids. For each amino acid, the ball-and-stick (left) and space-filling (right) models show only the side chain. Basic Basic Figure 22-1 p596

Primary Structure: Kinks and Planes

Secondary Structure: Alpha Helix Beta Sheet FIGURE 22.10 (a ) The α-helix. (b ) The β-pleated sheet structure. Figure 22-10 p611

Hydrogen Bonding in Beta Sheet

Tertiary Structure FIGURE 22.20 Forces that stabilize the tertiary structures of proteins. Note that the helical structure and the sheet structure are two kinds of backbone hydrogen bonding. Although the backbone hydrogen bonding is part of the secondary structure, the conformation of the backbone puts constraints on the possible arrangement of the side chains. Figure 22-20 p618

Quaternary Structure