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Ch5c Proteins and Nucleic Acids 5251.notebook 1 Amino Acid Structure
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Nonpolar, polar, or electrically charged amino acids? · Ch5c Proteins and Nucleic Acids 5251.notebook 3 Nonpolar, polar, or electrically charged amino acids? Nonpolar, polar, or

May 21, 2018

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Page 1: Nonpolar, polar, or electrically charged amino acids? · Ch5c Proteins and Nucleic Acids 5251.notebook 3 Nonpolar, polar, or electrically charged amino acids? Nonpolar, polar, or

Ch5c Proteins and Nucleic Acids 525­1.notebook

1

Amino Acid Structure

Page 2: Nonpolar, polar, or electrically charged amino acids? · Ch5c Proteins and Nucleic Acids 5251.notebook 3 Nonpolar, polar, or electrically charged amino acids? Nonpolar, polar, or

Ch5c Proteins and Nucleic Acids 525­1.notebook

2

Nonpolar, polar, or electrically charged amino acids?

Page 3: Nonpolar, polar, or electrically charged amino acids? · Ch5c Proteins and Nucleic Acids 5251.notebook 3 Nonpolar, polar, or electrically charged amino acids? Nonpolar, polar, or

Ch5c Proteins and Nucleic Acids 525­1.notebook

3

Nonpolar, polar, or electrically charged amino acids?

Nonpolar, polar, or electrically charged amino acids?

Page 4: Nonpolar, polar, or electrically charged amino acids? · Ch5c Proteins and Nucleic Acids 5251.notebook 3 Nonpolar, polar, or electrically charged amino acids? Nonpolar, polar, or

Ch5c Proteins and Nucleic Acids 525­1.notebook

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Figure 5.18 Making a polypeptide chain

Primary structure of a protein

Sequence of amino acids

Page 5: Nonpolar, polar, or electrically charged amino acids? · Ch5c Proteins and Nucleic Acids 5251.notebook 3 Nonpolar, polar, or electrically charged amino acids? Nonpolar, polar, or

Ch5c Proteins and Nucleic Acids 525­1.notebook

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Secondary Structure ­ the result of H bonds between the repeating constituents of the polypeptide backbone (NOT the amino acid side chains).

H bond between every 4th amino acid

H bonds between two parallel polypeptide backbones

Figure 5.21 Levels of protein structure—secondary structure

Page 6: Nonpolar, polar, or electrically charged amino acids? · Ch5c Proteins and Nucleic Acids 5251.notebook 3 Nonpolar, polar, or electrically charged amino acids? Nonpolar, polar, or

Ch5c Proteins and Nucleic Acids 525­1.notebook

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https://mywebspace.wisc.edu/jonovic/web/proteins.htmlProtein structure animation:

Examples of interactions contributing to the tertiary structure of a protein

Page 7: Nonpolar, polar, or electrically charged amino acids? · Ch5c Proteins and Nucleic Acids 5251.notebook 3 Nonpolar, polar, or electrically charged amino acids? Nonpolar, polar, or

Ch5c Proteins and Nucleic Acids 525­1.notebook

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The quaternary structure of proteins

A single amino acid substitution in a protein causes sickle­cell disease

Page 8: Nonpolar, polar, or electrically charged amino acids? · Ch5c Proteins and Nucleic Acids 5251.notebook 3 Nonpolar, polar, or electrically charged amino acids? Nonpolar, polar, or

Ch5c Proteins and Nucleic Acids 525­1.notebook

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Denaturation and renaturation of a protein

DNA à RNA à protein: a diagrammatic overview of information flow in a cell

Page 9: Nonpolar, polar, or electrically charged amino acids? · Ch5c Proteins and Nucleic Acids 5251.notebook 3 Nonpolar, polar, or electrically charged amino acids? Nonpolar, polar, or

Ch5c Proteins and Nucleic Acids 525­1.notebook

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The components of nucleic acids