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177250

Isolation and Screening of Proteolytic Bacteria from Sandy Soil in Sadat City, Egypt

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Last updated: 22 Jan 2023

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Abstract

Proteases are one of the most studied microbial group of enzymes for theirimportance at commercial, industrial, pharmaceutical and also diagnostic fields. The aim of this work was the isolation of proteolytic bacteria from soil and characterization of their proteolytic activity. Two effective protease producing bacterial isolates have been obtained from soil from Sadat City and evaluated its extracellular protease production properties by exhibiting a clear zone on media containing skimmed milk casein as a substrate for the protease enzyme. The strains have been identified according to basic biochemical tests using Bergey's Manual of Systematic Bacteriology as Bacillus sp. Scanning electron microscopy revealed morphology of Cells of Bacillus colonies tended to be longer than in liquid culture and irregular in shape and to give the appearance of branching. The 16s rRNA gene pcr and sequencing were used for species identification of the 2 isolates. And by analysis of the sequence results using the BLASTn, it revealed that one isolate (Ash1) was identified as bacillus cereus and the other (Ash2) was bacillus subtilis. The enzyme production reached its maximum level at pH 8.0 at 37oC incubation temperature, under aerated environment, suggesting the enzyme produced is alkaline in nature. The Bacillus cereus strain Ash1 and B. subtilis Ash2 showed maximum growth at 37oC with alkaline protease production at pH 8.0 and at 150 rpm. This study reveals the importance of genus bacillus in protease production among the bacterial population in soil, although the narrow scale this study was applied on, but it has to be studied on larger scales in Egypt, an issue that will provide many beneficial information for various fields particularly the industrial sectors.
 

DOI

10.21608/jcvr.2019.177250

Keywords

Bacillus sp, Protease, Soil, 16S rRNA

Authors

First Name

Ashgan

Last Name

Abd Elgawaad

MiddleName

Ibrahim

Affiliation

Department of Microbial Genetics, Microbial Biotechnology Department, Genetic Engineering and Biotechnology Research Institute, University of Sadat City.

Email

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City

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Orcid

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First Name

Atef

Last Name

Ibrahim

MiddleName

Mohamed

Affiliation

Department of Microbial Genetics, Microbial Biotechnology Department, Genetic Engineering and Biotechnology Research Institute, University of Sadat City.

Email

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City

-

Orcid

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First Name

Adel

Last Name

Okba

MiddleName

-

Affiliation

Department of Microbial Genetics, Microbial Biotechnology Department, Genetic Engineering and Biotechnology Research Institute, University of Sadat City.

Email

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City

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Orcid

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First Name

Shimaa

Last Name

Samir

MiddleName

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Affiliation

Department of Bacteriology, Mycology and Immunology, Faculty of Veterinary Medicine, University of Sadat City.

Email

kamelsamir95@yahoo.com

City

Ashmoon

Orcid

-

Volume

1

Article Issue

2

Related Issue

8666

Issue Date

2019-11-01

Receive Date

2019-10-01

Publish Date

2019-11-17

Page Start

156

Page End

162

Print ISSN

2636-4018

Online ISSN

2636-4026

Link

https://jcvr.journals.ekb.eg/article_177250.html

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https://jcvr.journals.ekb.eg/service?article_code=177250

Order

18

Type

Original Article

Type Code

799

Publication Type

Journal

Publication Title

Journal of Current Veterinary Research

Publication Link

https://jcvr.journals.ekb.eg/

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Article

Created At

22 Jan 2023