slide1 n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
What are Proteins? Amino Acids PowerPoint Presentation
Download Presentation
What are Proteins? Amino Acids

Loading in 2 Seconds...

play fullscreen
1 / 22

What are Proteins? Amino Acids - PowerPoint PPT Presentation


  • 140 Views
  • Uploaded on

What are Proteins? Amino Acids. Functions Enzymes Hormones Defense Structure Transport. Classification of Proteins (Chemical Composition) Simple Proteins – consist of ONLY Amino Acids Conjugated Proteins - have NON-Protein Portions as major component Glycoproteins Lipoproteins

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'What are Proteins? Amino Acids' - azize


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
slide4

Functions

  • Enzymes
  • Hormones
  • Defense
  • Structure
  • Transport
slide5

Classification of Proteins (Chemical Composition)

Simple Proteins – consist ofONLY Amino Acids

Conjugated Proteins -have NON-Protein Portions as major component

  • Glycoproteins
  • Lipoproteins
  • Phosphoproteins
slide6

Classification of Proteins (Shape)

Globular Proteins – tightly folded, Water Soluble

Involved in: synthesizing, transporting, and metabolizing

Such as: Hemoglobin, Hormones, Antibodies, Enzymes

Fibrous Proteins –long, Water Insoluble

Involved in: Structural material of cells and tissues

Such as: Keratin, Elastin, Collagen

slide7

Globular Proteins

Fibrous Proteins

slide8

Protein Structure

Primary (1o) Structure

Peptide Sequence

  • Amino Acids in Peptide Chain called, “Amino Acyl Residues”
  • Peptide bonds form between Carbonyl Carbon & Amino Nitrogen, by removal of an O- from the Carbonyl and 2 H+ from the Nitrogen… Removal of H2O forms Peptide Bonds
slide10

Secondary (2o) Structure

Folding of Peptide Sequence (1o Structure)

  • Hydrogen Bonding utilizing Peptide-Bonding Atoms
  • Intra-chain Hydrogen Bonding (α Helix)
    • Hair, Wool, Horns, and Feathers
  • Inter-chain Hydrogen Bonding (β Pleated Sheets)
    • Silk
slide12

Tertiary (3o) Structure

Folding and Twisting of 2o Structure

  • Hydrophobic R groups cluster on inside of protein away from water
  • Hydrophilic R groups cluster on outside of protein near water
  • Hydrogen Bonding of non-peptide bonding atoms
  • Ionic Salt-bridges, COO-● ●● ● +NH3
  • Disulfide Bonds (Disulfide Bridges) b/n SH-Groups
    • Cysteinenot Methionine
slide14

Quaternary (4o) Structure

Folding, Twisting, and Other Interactions b/n different polypeptide strands in pre-existing 3o structure

  • Hydrophobic Bonding and Interactions
  • Hydrogen Bonding of Non-peptide Bonding Atoms
  • Ionic Salt-bridges, COO-● ● ● ● +NH3
  • Disulfide Bonds (Disulfide Bridges) b/n SH-Groups

Classifications: Dimers, Trimers, Tetramers, Pentamers, Hexamers

  • EX: Hemoglobin– tetramer (2 α subunits & 2 β subunits)
    • Each unit contains the Heme prosthetic group which contains Iron and is responsible for binding O2 in Blood.