Protein structure
Sponsored Links
This presentation is the property of its rightful owner.
1 / 14

Protein Structure PowerPoint PPT Presentation


  • 62 Views
  • Uploaded on
  • Presentation posted in: General

Protein Structure. Over 50% of the body’s dry mass is protein; proteins are the most important organic molecule in the body. The building blocks of proteins are amino acids. 26 amino acids exist in nature; humans require 20 to make the proteins we need.

Download Presentation

Protein Structure

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


Protein Structure

  • Over 50% of the body’s dry mass is protein; proteins are the most important organic molecule in the body.

  • The building blocks of proteins are amino acids.

  • 26 amino acids exist in nature; humans require 20 to make the proteins we need.

  • Amino acids are manufactured by plants and some bacteria; animals cannot make amino acids unless they eat plants or eat animals that eat plants.


Function of Proteins

  • Proteins function as:

    • Regulatory:Enzymes and hormones are proteins..(control the rate of all metabolic reactions; either anabolic or catabolic).

    • Structural protein; muscle fibers, connective tissue, hair and tendons are all composed of protein.


Basic Structure of an Amino Acid

All amino acids contain an amino group and a

Carboxylic acid group; these functional groups are

“sticky,” that is, they are charged and can form bonds with

each other.


Here are the structures

of the 20 amino

acids needed by the

body; Note the pink

highlighted areas

are the same amongst

all of the acids; these

are the carboxylic

acid and amino groups.


Joining Amino Acids to Form a Peptide Bond


Peptide Bond Continued…


Peptide Bond Animations

http://student.ccbcmd.edu/~gkaiser/biotutorials/proteins/peptide.html

http://www.johnkyrk.com/aminoacid.html

http://www.stolaf.edu/people/giannini/flashanimat/proteins/protein%20structure.swf

Protein folding

http://intro.bio.umb.edu/111-112/111F98Lect/folding.html

Protein folding

http://www.sumanasinc.com/webcontent/animations/content/proteinstructure.html

Protein denaturature egg whites


MILK PROTEIN: “Curds” and “Whey”

  • Milk contains two major proteins:

    • “casein” found in the curds (cheese)

    • “whey” found in the liquid left over after cheese is made


MILK PROTEINS..structure of milk

  • Milk is a colloid, that is, a mixture of two or more substances that will separate over time due to large particle size.


Casein protein is an Emulsifier, that is, the casein molecule contains both a polar (charged) section and a nonpolar (uncharged) section making the casein molecule both hydrophillic and hydrophobic.


http://members.ift.org/NR/rdonlyres/A0BC8635-4EE2-4CD7-8928-55E310DC228C/0/fc3std.pdf


  • Login