Classification of protein based on shape, Biology

Assignment Help:

Protein Classification Based on Shape

There are three types of proteins on the basis of shape - Fibrous, Globular, Intermediate

1.       FIBROUS PROTEINS

  1. They are thread-like elongated proteins which have little or no tertiary structure.
  2. Secondary structure in the final structure in fibrous proteins.
  3. All the three types of secondary structure occur in fibrous proteins.
  4. Fibrous proteins occur singley or join together in coils and bundles to form fibres.
  5. They are nonenzymatic proteins which are insoluble in water, produce structural components, provide rigidity and elasticity.
  6. Common fibrous proteins are collagen (connective tissue, tendon, cartilage, bone teeth), keratin (skin, hair, beaks, feathers, claws, nails, hoofs, horns), fibroin (silk, spider webs), elastin, tropomyosin, paramyosin, fibrin (blood clot), etc.

2.       GLOBULAR PROTEINS

  1. They are rounded, over or oblong in outline.
  2. The shape is achieved through tertiary and quaternary folding of polypeptides.
  3. Most of the proteins are globular in nature.
  4. They are not contractile but otherwise from all other types of proteinaceous structures, both enzymatic and non-enzymatic (including antibodies and hormones).
  5. Their solubility in water depends upon size.
  6. Smaller globular proteins are soluble in water.
  7. They are also not coagulated by heat, e.g., histones.
  8. With increase in size the globular proteins become sparingly soluble in water and develop the tendency to get coagulated by heat.
  9. Albumins are soluble in water but are coagulated by heat, e.g., egg albumin. Globulins (e.g., Serum globulins) and glutenins (e.g., Wheat, Maize) are both insoluble in water and coagulate with application of heat.

3.       INTERMEDIATE PROTEINS

  1. They are neither fibrous nor globular but of intermediate from and characteristics.
  2. Myosin with some 1700 amino acid residues in its polypeptide is not fibrous but assumes an extended from in solution.
  3. Fibrinogen is a highly soluble extended but somewhat asymmetric protein that forms insoluble fibrin in coagulated blood.

Related Discussions:- Classification of protein based on shape

Explain iron balance and regulation of iron absorption, Explain Iron Balanc...

Explain Iron Balance and Regulation of Iron Absorption? The body has three unique mechanisms for maintaining iron balance. The first is the continuous reutilization of iron fro

What is the role of pancreatic lipase, During digestion, the role of pancre...

During digestion, the role of pancreatic lipase is to: -digest cholesterol into dimethlyalpyrophosphase -inhibits interactions between lipids and bile salts -hydrolize TG

What are the uses of whey protein concentrates, What are the uses of whey p...

What are the uses of whey protein concentrates? Whey protein concentrates are used extensively in the manufacture of baked goods, where they increase the effectiveness of short

Explain some guidelines to help in use drugs wisely, Explain some Guideline...

Explain some Guidelines to Help in Use Drugs Wisely? By now, you are aware that the interaction of foods and drugs is a complex problem. Researchers cannot always predict wheth

Discuss about brain, Brain Brain is a part of central nervous system wh...

Brain Brain is a part of central nervous system which lies in the skull. Source: Sears and Windwood, Anatomy and Physiology for Nurses The different parts of the bra

Examples of diseases which can be spread by drinking water, (a) Give two ex...

(a) Give two examples of diseases which can be spread by contaminated drinking water. (b) How can the spread of such diseases be prevented?   (a) Typhoid and cho

Matlab, Write up your own Matlab program to do the job described by Show"...

Write up your own Matlab program to do the job described by Show">http://www.avatar.se/molbioinfo2001/dynprog/adv_dynamic.html Show a few examples, your code does work. You wil

Water absorption and transpiration, Water Absorption and Transpiration ...

Water Absorption and Transpiration The rate of water absorption is controlled by the rate of transpiration. A high water potential in the atmosphere would reduce water loss fr

What do ypu know about conduction disturabances, Q. What do ypu know about ...

Q. What do ypu know about Conduction Disturabances? During exercise there is an increase in the sympathetic drive and a withdrawal of vagal tone. Sympathetic enhancement of con

Surgical treatment options, Cardiomyoplasty This is a procedure wherei...

Cardiomyoplasty This is a procedure wherein the latissimus dorsi muscle is wrapped around the heart and stimulated to contract synchronously with it. It has been largely given

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd