Amino Acids.

Slides:

Advertisements

Similar presentations

Proteins from Amino Acids

Advertisements

1.The amino acid monomer. Spot the similarity.

Proteins & Nucleic Acids Images taken without permission from

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.

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

Biology 102 Lecture 5: Biological Molecules (cont.)

Proteins Structures Primary Structure.

G-protein linked Plasma membrane receptor. Works with “G-protein”, an intracellular protein with GDP or GTP. Involved in yeast mating factors, epinephrine.

Identify and Investigate the role of enzymes.

Joe Wright Enzymes. Joe Wright What are Enzymes? Globular proteins Biological catalysts Do not change after reaction They are found in small quantities.

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

Chapter 3 Nucleic Acids, Proteins and Enzymes. Nucleic Acids Informational polymers Made of C,H,O,N and P No general formula Examples: DNA and RNA.

Proteins  Organic compounds made of C, O, H, N and S  Building blocks – 20 different amino acids  Peptide and Polypeptides: Dehydration (Condensation)/

ENZYMES. Biological Catalysts Enzymes are complex proteins, usually having either tertiary or quarternary structure, and are responsible for mediating.

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

Regents Biology Proteins Regents Biology Proteins: Multipurpose molecules.

 Proteins have many different functions in the body  Structure – proteins help provide structure and support, make up muscles and bones.

Explain how enzymes function as catalysts.

A protein’s function depends on its specific conformation (shape) A functional proteins consists of one or more polypeptides that have been precisely twisted,

D. NUCLEIC ACIDS 1.ARE MADE OF THE ELEMENTS C,H,O,N,P.

Proteins. Proteins Chains of amino acids Basic structure below:

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

Proteins: Molecules with Diverse Structures and Functions

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

Protein Structure and Enzyme Function

Proteins A protein is a compound made of small carbon compounds called AMINO ACIDS There are 20 different kinds of AMINO ACIDS.

Themes: Structure meets Function

Happy Monday! 9/16/2013 PQ & Journal—7.5 & 7.6 Test Wednesday, let’s boogy!

Protein Structure Primary - sequence of amino acids Secondary – folding into pleated sheets or alpha helix Tertiary – 3-D structure, completely folded.

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.

CHAPTER 5 THE STRUCTURE AND FUNCTION OF MACROMOLECULES Copyright © 2002 Pearson Education, Inc., publishing as Benjamin Cummings Section D: Proteins -

ENZYMES. Enzymes help with most chemical reactions in the body.

3S: Proteins Shireen Rudina. What do proteins do? Structure – Collagen in skin, keratin in hair and nails Signaling between cells Defend against disease.

Chapter 3 Enzymes. Chemical Reactions Chemical reactions: – Involve breaking of chemical bonds in reactants Requires activation energy – Making new chemical.

Proteins Importance: instrumental in nearly everything organisms do; 50% dry weight of cells; most structurally sophisticated molecules known Monomer:

Four Levels of Protein Structure

Proteins Organic compounds made of C, O, H, N and S

Metabolism Lecture 5, part 2 Fall 2008

Proteins: Secondary and Tertiary Structure

Chemical Reactions, Energy & enzymes

Proteins clockwise: Rubisco — most important protein on the planet?

Proteins Made of amino acids in a specific sequence attached by peptide bonds. Consist primarily of carbon, hydrogen, oxygen, and nitrogen, but may include.

Enzyme Action Learning objective: to describe different models for

Protein Structure and Function

Draw an amino acid.

Macromolecules Part 2 Unit 1 Chapter 5.

Lesson 2.4: Chemical Reactions & Enzymes

Sec 2.3 Chemical Reactions and Enzymes

Diverse Macromolecules

Study Question: What are enzymes?

Enzymes and Proteins.

Enzymes a special type of protein.

Enzymes What do you know already? What are they?

Identify and Investigate the role of enzymes.

Enzyme Action Learning objective: to describe different models for

Enzyme-Substrate Complex

List a Carbohydrate Monomer

Enzymes Biological catalyst – it speeds up reactions without being permanently changed.

ENZYMES Unit 1 Biochemistry.

SB1b. Explain how enzymes function as catalysts.

Identify and Investigate the role of enzymes.

C-Notes: Proteins General Structure

Presentation transcript:

Amino Acids

Review the 4 Classes of Protein Structure 1. Primary Structure Phenylalanine

2. Secondary Structure a. Alpha (α) Helix b. Pleated Sheet

Secondary Structure of a Protein

3. Tertiary Structure Overall primary and secondary structure Hydrophobic interactions Disulfide bridges Ionic bonds between opposite charges

4. Quarternary Structure **Increased complexity = increased stability!**

Enzymes Proteins (sometimes RNA) Biological catalysts Reuseable Reduce activation energy

Lock and key model **Generally catalyze ONE reaction ONLY!!!**

Induced Fit Model

Factors that affect enzyme activity 1. Temperature – optimal temperature for fastest rate of reaction 60 Optimal range

2. pH – optimal pH at which rate of reaction is fastest Effect of pH on enzyme activity