Biotech Articles
Publish Your Research Online
Get Recognition - International Audience

Request for an Author Account   |   Login   |   Submit Article

General Inroduction on Biological Sources of Proteases

BY: Kirti Rani | Category: Biology | Submitted: 2012-08-05 04:03:30
       Author Photo
Article Summary: "Proteases are widely distributed in most of biological source (plant and animal sources). They are ubiquitous with wide diversity of sources such as plants and animals..."

Share with Facebook Share with Linkedin Share with Twitter Share with Pinterest Email this article

Proteases are widely distributed in most of biological source (plant and animal sources). They are ubiquitous with wide diversity of sources such as plants and animals.

Plant Proteases
Papain, bromelain and ficin represent some of the well-known proteases of plant origin. Papain is a traditional plant protease and isolated from the latex of Carica papaya fruits. This enzyme is active between pH 5-9 and is stable up to 90°C. Bromelain is extracted from the stem and juice of pineapples. The enzyme is also called as cysteine protease which is less stable than that of papain. A neutral protease is alsopurified from Raphanus sativus leaves. An aspartic protease is also present in potato leaves with different physiological roles and Thiol Protease is also purified from Pineapple Crown Leaf. Serine protease was also found in artificially senescing parsley leaves whose proteolytic activity was found low in young leaves and increased from the start of senescence lead to reduction in the protein content of the leaves. Endoproteases were also isolated from alfalfa, oat and barley senesced leaves which are involved in the process of protein degradation during foliar senescence.

Animal Proteases
The most common proteases of animal origin are pancreatic trypsin, chymotrypsin, pepsin, and rennins. Trypsin is the main intestinal digestive enzyme which is responsible for the hydrolysis of food proteins. It is a type of serine protease and hydrolyzes peptide bonds in which the carboxyl groups are contributed by the lysine and arginine residues. Chymotrypsin is found in animal pancreatic extract and it is also expensive enzyme which is used only for diagnostic and analytical applications. It is specific for the hydrolysis of peptide bonds in which the carboxyl groups are provided by one of the three aromatic amino acids, i.e., phenylalanine, tyrosine, or tryptophan. It is used extensively in the de-allergenizing of milk protein hydrolysates. Pepsin is an acidic protease and present in the stomachs of vertebrates. Rennet is a pepsin-like protease (rennin, chymosin) which is present in its inactive precursor, pro-rennin, in the stomachs of all ruminants. It is used exclusively in the dairy industry to produce good flavored curd.

About Author / Additional Info:
Author name and address:
*Corresponding author:
Dr. Kirti Rani Sharma,
Assistant Professor (II),
Amity Institute of Biotechnology,
Amity University Uttar Pradesh, Noida
Sec-125, Gautam Buddha Nagar, Noida-201303 (UP), India.
Email ID:,

Search this site & forums
Share this article with friends:

Share with Facebook Share with Linkedin Share with Twitter Share with Pinterest Email this article

More Social Bookmarks (Digg etc..)

Comments on this article: (0 comments so far)

Comment By Comment

Leave a Comment   |   Article Views: 5662

Additional Articles:

•   Overview of Hydrogenase Enzyme

•   Lab and Field Techniques for Aflatoxin Research in Peanut

•   Surgery, Radiotherapy and Chemotherapy Followed by Tumor Immunotherapy?

•   Artificially Induced Mutations

Latest Articles in "Biology" category:
•   Wonderful World of Microorganisms and Their Role in Human Life.

•   Molecular Biology Techniques

•   Process of Reproduction in Bacteria

•   Importance of Microorganisms in the Ecosystem

•   Starting From the Basics: DNA Extraction

•   Agrobacetium-Mediated Transformation Protocol

•   Sucrose Regulating Photosynthesis

•   Nitrogen Fixation: Genes Involved and the Infection Process

•   Functional Genomics: A Tool in Genetic Engineering

•   Plant Tissue Culture and Its Applications

•   Harmful Effects of Mold and Their Prevention

•   Gel Electrophoresis in Molecular Biology

•   Extraction of Phytochemicals

•   Applications of Thin Layer Chromatography

•   Beneficial and Harmful Bacteria

•   Calvin Cycle Regulation and Effect on Photosynthesis

•   How a Baby Develops Inside Mother's Womb: From an Embryo to a Child

•   Apoptosis (or cell suicide) : Process and Types

•   Neurotransmitters and its types

Important Disclaimer: All articles on this website are for general information only and is not a professional or experts advice. We do not own any responsibility for correctness or authenticity of the information presented in this article, or any loss or injury resulting from it. We do not endorse these articles, we are neither affiliated with the authors of these articles nor responsible for their content. Please see our disclaimer section for complete terms.
Page copy protected against web site content infringement by Copyscape
Copyright © 2010 - Do not copy articles from this website.

Agriculture Bioinformatics Applications Biotech Products Biotech Research
Biology Careers College/Edu DNA Environmental Biotech
Genetics Healthcare Industry News Issues Nanotechnology
Others Stem Cells Press Release Toxicology  

  |   Disclaimer/Privacy/TOS   |   Submission Guidelines   |   Contact Us