Introducing
Prezi AI.
Your new presentation assistant.
Refine, enhance, and tailor your content, source relevant images, and edit visuals quicker than ever before.
Trending searches
Loading…
CLASSIFICATION OF PROTEINS ACCORDING TO THEIR COMPOSITION
8
Transcript
Nucleoproteins
Histones
- Protein + Nucleic Acid
- Examples: Ribosomes, nucleosomes, all viruses
Protamines
Glycoproteins
- Water soluble proteins
- Rich in ARGININE or LYSINE
- Packages DNA
Scleroprotein
- Water soluble
- Low molecular Weight
- Rich in ARGININE
- Consists of 28 amino acids (19 arginines and 8-9 non basic amino acids)
- Protein + Carbohydrate
- Linkage between asparagines (Ans) and glucosamine
- intracellular
- important role in membrane interaction and recognition
- secretory
- plasma glycoproteins
Albumins
- a.k.a. albuminoids
- insoluble in all neutral solvents and dilute alkalis and acids
- Fibrous proteins
- Found in connective tissues and in hair and nails
- Function: Provides protective and structural support in connective tissues
Functions
- Essential for sperm head condensation
- DNA stabilization
- Medical:
- Neutralizes anti-clogging effects
- prevents obesity
Example
CONJUGATED PROTEINS
Keratin
- Found in body cells and blood stream of vertebrate animals.
- Water soluble
- Moderately soluble in concentrated salt solutions
- Denaturizes in heat
Globulins
Structure
Conjugated Proteins
Function
- Binds: Water, cations, fatty acids, hormones , etc...
- Function in serum albumin (55% blood proteins):
- Regulate oncotic pressure (regulates water distribution)
Prolamines
- Major blood protein (40%)
- Produced in liver & immune system
- Insoluble in water
- Soluble in dilute salt solutions
Phosphoproteins
- Contains a non-protein portion
- non-protein portion known as the "prosthetic group" or the "cofactor"
- Soluble in 70-80% alcohol
- Found ONLY in PLANT material
- Plant storage proteins containing high GLUTAMINE and PROLINE content
- Protein + Phosphate
- Phosphate group regulates protein function
- Example: Casein (milk), ovovitelline (eggs)
Functions
Example
- Primarily involved in defense mechanisms of the body
- Also transport various substances
Types of Globulins
- Alpha and beta globulins
- mainly in liver
- transport substances (hormones, cholesterol, and iron) in blood
- Beta globulins can bind to lipid molecules (cholesterol)
- Gamma globulins
- produced by lymphocytes
- Part of the body's defense system and fight pathogens
Hemoglobin
Lipoproteins
- Proteins + lipids
- HDL, LDL, lipoproteins, pre-B lipoproteins
Simple Proteins
Introduction
Glutelins
- Contain only amino acids or their derivatives
- Further classified according to their solubility
- Soluble in dilute acids and alkalis
- Occurs ONLY in PLANT material
- Primary energy storage in rice
- Simple Proteins
- Conjugated Proteins
Chromoproteins
Examples
- Protein + pigment
Plasma albumin
Collagen
Keratin
Metalloproteins
- Protein + metal ion
- Example: caeruoplasmin enzyme
CLASSIFICATION OF PROTEINS
ACCORDING TO THEIR COMPOSITION
Choose a template
Presentations from around the world
Learn more about creating dynamic, engaging presentations with Prezi