Production, partial optimization and characterization of keratinase enzyme by Arthrobacter sp. NFH5 isolated from soil samples. Keratinase is an inducible enzyme that is synthesized only when an inducer ( keratin) appears in the environment. Keratinase can be produced by many kinds of. The three Bacillus spp. produced extracellular keratinases and of feather or feather meal on the production of keratinolytic enzymes by three.

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The production of keratinase occurred in late exponential phase or in the stationary phase of microbial growth with corresponding degradation of feather substrate in the period. Keratinase production by three Bacillus spp. Effects of organic and inorganic nitrogen sources on keratinase production The keratinase production by the isolated bacterium strain was also optimized by supplementing different organic and inorganic nitrogen sources individually.

The keratin for analytical analyses was obtained by the method described by Wawrzkiewicz et al.

Produxtion produced maximum keratinase when keratinous protein elements were present in the media. Salimullah3 and Abu Hashem 2. Decomposition of native keratin by Streptomyces fradiaeJ.

A current value-added use for feathers is the conversion to feather meal using physical and chemical treatments. Keratinase actually has the activity of disulfide reductase and polypeptide hydrolase.

The concentrated culture supernatant was mixed with the peptidase sample buffer [Tris-HCl 0. One unit of keratinase activity was defined as the amount of enzyme required to produce an absorbance increase of 0.

Microbial Keratinase Production and Application to Improve the Properties of Wool Fabrics

Biodegradation of poultry waste by keratinases is an environment friendly biotechnological process, which converts this abundant waste into low-cost, nutrient-rich animal feed [ 1819 ]. The sequences are deposited in GenBank with accession numbers EU To receive news and publication updates for Enzyme Research, enter your email address in the box below.


Similar finding was achieved from Arthrobacter creatinolyticus by Kate and Pethe Our results identified starch, galactose, and glycerol as good carbon sources in the order mentioned. Improvement of shrink-resistance and tensile strength of wool fabric treated with a novel microbial transglutaminase from Streptomyces provuctionEnzyme Microb. FK46 [ 10 ]. However, the use of feather waste as a dietary protein supplement for animal keratinawe is only carried out on a limited basis, due to its poor digestibility [ 3 ].

Associated Data Data Availability Statement Most of the data supporting our finding included in the manuscript. Maximizing the Production of Keratinase The two selected native isolates were subjected to treatment with a combination of physical UV light and chemical hydroxylamine hydrochloride HA and ethyl methyl sulphonate EMSmutagens adopting the method of Eisentadt [ 23 ].

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Keratinase is an important invasive factor of dermatophytes. Thus, the present study is a step forward in the process of production of indigenous keratinase enzyme. The improvement in colour strength is very significant especially enzymr keratinase on dyed fabrics with Realan Blau RC. Hydrolysis of feather keratin by immobilized keratinase.

A total of 44 morphologically well-formed single colonies were selected from ten different soil samples on the basis of their morphological difference in nutrient agar plates. Deivasigamani B, Alagappan KM.

Substrate degradation by B. Ethics approval and consent to participate Not applicable. The pH and volume of the media were 7. There was no significant variation in biomass production in three media. The results of effect of nitrogen source on keratinase production are shown in Figure 3 b. In the present study, bacteria were isolated from collected soil samples and screened for keratinase producing capability on the basis of clear zone formation.


Considering that the presence of keratinous substrates usually induces keratinase production, the main aim of the study was to compare the influence of feather or feather meal on the production of keratinolytic enzymes by three Bacillus spp. Enzymes as auxiliary agents in wool dyeing, Color.

SEM micrographs also proved that the keratinase treatment gave rise to the proteolysis of cuticle layers resulting a partial removal of the scales with smooth edges.

Properties The molecular weight of keratinase that has been isolated and purified is quite different, ranging from dozens of kDa to several hundred kDa. Samples were applied to Keratin is also categorized as hard and soft keratin comprising the amount of sulphur in their amino acids content.

Keratinase enzyme was assayed by azokeratin assay adopting the method of Lin et al. The aim of the study was enhancing keratinase production from Streptomyces sp. Subscribe to Table of Contents Alerts. After the enzymatic treatment, smaller peptide and protein segments are removed, proteolytic reaction increases and hydrophilic surface occurs. This was determined in the culture supernatants according to Lowry et al. While the keratinase production in the fermentation medium containing 0.

Protein Content This was determined in the culture supernatants according to Lowry et al. The crude enzyme exhibited activity from neutral to alkaline conditions pH 7.

Keratinase can also be used in cosmetics and medicine industry.