Presentation is loading. Please wait.

Presentation is loading. Please wait.

Protein Structures Primary Structures: peptide bonds between amino acids Secondary Structures: hydrogen bonds between COOH & NH2 of different AA Tertiary.

Published byCarmel Harper Modified over 5 years ago

Similar presentations

Presentation on theme: "Protein Structures Primary Structures: peptide bonds between amino acids Secondary Structures: hydrogen bonds between COOH & NH2 of different AA Tertiary."— Presentation transcript:

1 Protein Structures Primary Structures: peptide bonds between amino acids Secondary Structures: hydrogen bonds between COOH & NH2 of different AA Tertiary Structures: disulfide bonds between variable side groups Quaternary Structures: multiple polypeptides

2 Primary Structure … Try – Gly – Lys – Pro – Val – Arg – Glu …
N-terminal C-terminal

3 Secondary Protein Structure: hydrogen bonds
Alpha-helix Beta-pleated sheets

4 HEAT Proteins are wound-up, and held together by disulfide & hydrogen bonds. Denaturation – change of molecular shape (unwind), and hydrogen bonds are broken. Coagulation - liquid  semisolid HEAT

5

6

7 Denaturation Thermal denaturation (stable 47-67°C)
Ionic strength/pH (disrupt H-bonds) Mechanical treatment (beating) Lab: Effect of Acid on Proteins

8 Anatomy of an Egg

9 Some Parts You Can Name…
Albumin (white) Yolk Shell: pores

10

11 Shell Texture Components Outer coating – cuticle Pores

12 Inner & Outer Membrane Protection Air cell in between Semi-permeable

13 Air Cell Location Formed after being laid

14 Albumen > 50% of an egg ~ 90% water 40 different proteins
Thick & thin albumen

15 Chalazae opaque twisted cordlike anchoring the yolk prominent in fresh eggs

16 Vitelline Membrane enclosing the yolk

17 Yolk even more protein, less water vitamins (A, B, D)
mineral (Fe, Ca, P) some fats

18 Good Eats Egg File Foaming & Emulsifying Denaturation
Hydrophilic & hydrophobic amino acids Foaming = incorporating air bubbles Emulsifying = mixing polar & nonploar solvents

19 Denaturation

20 Sets proteins in their “fluffy” shape
Foaming Heating Sets proteins in their “fluffy” shape

Download ppt "Protein Structures Primary Structures: peptide bonds between amino acids Secondary Structures: hydrogen bonds between COOH & NH2 of different AA Tertiary."

Similar presentations

Protein Proteins: Complex molecules made of hydrogen, carbon, oxygen, nitrogen and sometimes other elements. Proteins: Complex molecules made of hydrogen,

Protein Proteins: Complex molecules made of hydrogen, carbon, oxygen, nitrogen and sometimes other elements. Proteins: Complex molecules made of hydrogen,
Chapter 17-Part 2 Protein in Foods.

Chapter 17-Part 2 Protein in Foods.
Learning outcomes Describe the structure of an amino acid. Describe the formation and breakage of peptide bonds in the synthesis and hydrolysis of dipeptides.

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

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.

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

Parts of an Egg.
Proteins Structures Primary Structure.

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

Daily Starter  Explain how a peptide bond is formed. (What is the reaction called and how does it happen?)
 Denaturation changes the shape of a protein molecule without breaking its peptide bonds.  The result is a looser, less compact structure.

 Denaturation changes the shape of a protein molecule without breaking its peptide bonds.  The result is a looser, less compact structure.
Parts of an EGG.

Parts of an EGG.
Anatomy of an Egg. Shell Bumpy and grainy in texture. An eggshell is covered with as many as 17,000 tiny pores. It is a semi-permeable membrane, which.

Anatomy of an Egg. Shell Bumpy and grainy in texture. An eggshell is covered with as many as 17,000 tiny pores. It is a semi-permeable membrane, which.
Levels of Protein Structure 16.5. Peptide/Protein Formation Peptide: small, up to 50 AA Proteins: large, several 100 AA and/or multiple peptide chains.

Levels of Protein Structure Peptide/Protein Formation Peptide: small, up to 50 AA Proteins: large, several 100 AA and/or multiple peptide chains.
Objectives E – Recall the different structures of proteins and the test for proteins. C – Describe how a peptide bond is formed. Describe the different.

Objectives E – Recall the different structures of proteins and the test for proteins. C – Describe how a peptide bond is formed. Describe the different.
Regents Biology Proteins Regents Biology 2006-2007 Proteins: Multipurpose molecules.

Regents Biology Proteins Regents Biology Proteins: Multipurpose molecules.
1 Proteins AP Biology Proteins Multipurpose molecules.

1 Proteins AP Biology Proteins Multipurpose molecules.
2005-2006 AP Biology Proteins. AP Biology Proteins  Most structurally & functionally diverse group of biomolecules  Function:  involved in almost everything.

AP Biology Proteins. AP Biology Proteins  Most structurally & functionally diverse group of biomolecules  Function:  involved in almost everything.
7.4/14.1 PROTEINS. Protein’s have 4 levels of Structure: 1. Primary Structure = the order of amino acids that make up the polypeptide; amino acids are.

7.4/14.1 PROTEINS. Protein’s have 4 levels of Structure: 1. Primary Structure = the order of amino acids that make up the polypeptide; amino acids are.
AP Biology 2008-2009 Proteins Multipurpose molecules.

AP Biology Proteins Multipurpose molecules.
PROTEINS (Polymers of Amino Acids)

PROTEINS (Polymers of Amino Acids)
AP Biology Proteins AP Biology 2006-2007 Proteins Multipurpose molecules.

AP Biology Proteins AP Biology Proteins Multipurpose molecules.

Similar presentations

Ads by Google