Abstract
Keratinases secreted by microorganisms belong to proteolytic enzymes with unique characteristics to efficiently degrade tough, fibrous, and hydrolysis resistant keratin proteins. In this study, the biochemical characterization of a highly thermoactive and alkalophilic keratinase enzyme (FCnase) was reported that was isolated from the soil samples procured from a Bengaluru-based poultry dump yard, India. The screened isolate was identified as Bacillus cereus FC1365 (# MN712509—accession number) by 16S rRNA gene sequencing. FCnase production was carried out in minimal salt media supplemented with feather meal, and partial purification of the extracellularly secreted enzyme was achieved by acetone precipitation method. 3.4-fold purification of the enzyme was attained with a maximum activity of 21.4 U/ml. The enzyme was optimally active at pH 10 and 70 ℃. Km and Vmax of the enzyme were 0.396 mg/ml and 2.86 U/ml, respectively. SDS-PAGE and Zymogram confirmed the molecular weight of the FCnase as 63 kDa. Metal ions like Ca2+ and Mg2+ enhanced the enzyme activity while the ethylenediaminetetraacetic acid inhibited it, proving it to be a metalloprotease. Efficient feather degradation was demonstrated by the isolated robust enzyme making it suitable for feather waste management and other industrial applications.
![](http://media.springernature.com/m312/springer-static/image/art%3A10.1007%2Fs40011-023-01472-5/MediaObjects/40011_2023_1472_Fig1_HTML.jpg)
![](http://media.springernature.com/m312/springer-static/image/art%3A10.1007%2Fs40011-023-01472-5/MediaObjects/40011_2023_1472_Fig2_HTML.png)
![](http://media.springernature.com/m312/springer-static/image/art%3A10.1007%2Fs40011-023-01472-5/MediaObjects/40011_2023_1472_Fig3_HTML.png)
![](http://media.springernature.com/m312/springer-static/image/art%3A10.1007%2Fs40011-023-01472-5/MediaObjects/40011_2023_1472_Fig4_HTML.png)
![](http://media.springernature.com/m312/springer-static/image/art%3A10.1007%2Fs40011-023-01472-5/MediaObjects/40011_2023_1472_Fig5_HTML.png)
![](http://media.springernature.com/m312/springer-static/image/art%3A10.1007%2Fs40011-023-01472-5/MediaObjects/40011_2023_1472_Fig6_HTML.png)
![](http://media.springernature.com/m312/springer-static/image/art%3A10.1007%2Fs40011-023-01472-5/MediaObjects/40011_2023_1472_Fig7_HTML.png)
Similar content being viewed by others
References
Agrahari S, Wadhwa N (2010) Degradation of chicken feather a poultry waste product by keratinolytic bacteria isolated from dum** site at Ghazipur poultry processing plant. Int J Poult Sci 9:482–489. https://doi.org/10.3923/ijps.2010.482.489
Navone L, Speight R (2018) Understanding the dynamics of keratin weakening and hydrolysis by proteases. PLoS ONE 13:2608. https://doi.org/10.1371/journal.pone.0202608
Vidmar B, Vodovnik M (2018) Microbial keratinases: enzymes with promising biotechnological applications. Food Technol Biotechnol 56(3):312–328. https://doi.org/10.17113/ftb.56.03.18.5658
Kumawat TK, Sharma A, Sharma V, Chandra S. (2018) Keratin waste: the biodegradable polymers. In: Keratin. IntechOpen https://doi.org/10.5772/intechopen.79502
Brandelli A, Daroit DJ, Riffel A (2010) Biochemical features of microbial keratinases and their production and applications. Appl Microbiol Biotechnol 85:1735–1750. https://doi.org/10.1007/s00253-009-2398-5
Papadopoulos M, El Boushy A, Roodbeen A, Ketelaars E (1986) Effects of processing time and moisture content on amino acid composition and nitrogen characteristics of feather meal Animal Feed. Sci Technol 14:279–290. https://doi.org/10.1016/0377-8401(86)90100-8
Desai SS, Hegde S, Inamdar P, Sake N, Aravind MS (2010) Isolation of keratinase from bacterial isolates of poultry soil for waste degradation. Eng Life Sci 10:361–367. https://doi.org/10.1002/elsc.200900009
Herzog B, Overy D, Haltli B, Kerr R (2014). Keratinases – A viable approach for hair removal and younger looking skin. In: Conference: maritime natural products https://doi.org/10.13140/2.1.4891.8403
Deivasigamani B, Alagappan K (2008) Industrial application of keratinase and soluble proteins from feather keratins. J Environ Biol 29:933–936
Ramakrishnan N, Sharma S, Gupta A, Alashwal BY (2018) Keratin based bioplastic film from chicken feathers and its characterization. Int J Biol Macromol 111:352–358. https://doi.org/10.1016/j.ijbiomac.2018.01.037
Saibabu V, Niyonzima FN, More SS (2013) Isolation, partial purification and characterization of keratinase from Bacillus megaterium. Int Res J Biol Sci 2:13–20
Nagai Y, Nishikawa T (1970) Alkali solubilization of chicken feather keratin. Agric Biol Chem 34:16–22. https://doi.org/10.1080/00021369.1970.10859572
Uddin ME, Ahmad T, Ajam M, Moniruzzaman M, Mandol D, Ray S, Sufian A, Rahman M, Hossain E, Ahammed R (2017) Thermotolerant extracellular proteases produced by Bacillus subtilis isolated from local soil that representing industrial applications. J Pure Appl Microbiol 11:733–741. https://doi.org/10.22207/JPAM.11.2.12
Ghosh A, Chakrabarti K, Chattopadhyay D (2008) Degradation of raw feather by a novel high molecular weight extracellular protease from newly isolated Bacillus cereus DCUW. J Ind Microbiol Biotechnol 35:825–834. https://doi.org/10.1007/s10295-008-0354-5
Lo W-H, Too J-R, Wu J-Y (2012) Production of keratinolytic enzyme by an indigenous feather–degrading strain Bacillus cereus Wu2. J Biosci Bioeng 114:640–647. https://doi.org/10.1016/j.jbiosc.2012.07.014
Lateef A, Oloke J, Kana EG, Sobowale B, Ajao S, Bello B (2010) Keratinolytic activities of a new feather-degrading isolate of Bacillus cereus LAU 08 isolated from Nigerian soil. Int Biodeterior Biodegrad 64:162–165. https://doi.org/10.1016/j.ibiod.2009.12.007
Tork S, Aly M, Nawar L (2010) Biochemical and molecular characterization of a new local keratinase producing Pseudomomanas sp. MS21. Asian J Biotechnol 2:1–13. https://doi.org/10.3923/ajbkr.2010.1.13
Tamreihao K, Mukherjee S, Khunjamayum R, Devi LJ, Asem RS, Ningthoujam DS (2019) Feather degradation by keratinolytic bacteria and biofertilizing potential for sustainable agricultural production. J Basic Microbiol 59:4–13. https://doi.org/10.1002/jobm.201800434
Toyokawa Y, Takahara H, Reungsang A, Fukuta M, Hachimine Y, Tachibana S, Yasuda M (2010) Purification and characterization of a halotolerant serine proteinase from thermotolerant Bacillus licheniformis RKK-04 isolated from Thai fish sauce. Appl Microbiol Biotechnol 86:1867–1875. https://doi.org/10.1007/s00253-009-2434-5
Abdel-Fattah AM, El-Gamal MS, Ismail SA, Emran MA, Hashem AM (2018) Biodegradation of feather waste by keratinase produced from newly isolated Bacillus licheniformis ALW1. J Genet Eng Biotechnol 16:311–318. https://doi.org/10.1016/j.jgeb.2018.05.005
Gessesse A, Hatti-Kaul R, Gashe BA, Mattiasson B (2003) Novel alkaline proteases from alkaliphilic bacteria grown on chicken feather. Enzyme Microb Technol 32:519–524. https://doi.org/10.1128/AEM.62.8.2875-2882.1996
Bressollier P, Letourneau F, Urdaci M, Verneuil B (1999) Purification and characterization of a keratinolytic serine proteinase from Streptomyces albidoflavus. Appl Environ Microbiol 65:2570–2576. https://doi.org/10.1128/AEM.65.6.2570-2576.1999
Friedrich AB, Antranikian G (1996) Keratin degradation by Fervidobacterium pennavorans, a novel thermophilic anaerobic species of the order Thermotogales. Appl Environ Microbiol 62:2875–2882. https://doi.org/10.1128/AEM.62.8.2875-2882.1996
Nam G-W, Lee D-W, Lee H-S, Lee N-J, Kim B-C, Choe E-A, Hwang J-K, Suhartono MT, Pyun Y-R (2002) Native-feather degradation by Fervidobacterium islandicum AW-1, a newly isolated keratinase-producing thermophilic anaerobe. Arch Microbiol 178:538–547. https://doi.org/10.1007/s00203-002-0489-0
Abdel-Naby MA, El-Refai HA, Ibrahim MH (2017) Structural characterization, catalytic, kinetic and thermodynamic properties of Keratinase from Bacillus pumilus FH9. Int J Biol Macromol 105:973–980. https://doi.org/10.1016/j.ijbiomac.2017.07.118
Nigam V, Singhal P, Vidyarthi A, Mohan M, Ghosh P (2013) Studies on keratinolytic activity of alkaline proteases from halophilic bacteria. Int J Pharm Biol Sci 4:389–399. https://doi.org/10.1007/s12088-014-0477-5
Kojima K, Nakata H, Inouye K (2014) Involvement of Val 315 located in the C-terminal region of thermolysin in its expression in Escherichia coli and its thermal stability. Biochem Biophys Acta 1844:330–338. https://doi.org/10.1016/j.bbapap.2013.10.014
Balaji S, Kumar MS, Karthikeyan R, Kumar R, Kirubanandan S, Sridhar R, Sehgal P (2008) Purification and characterization of an extracellular keratinase from a hornmeal-degrading Bacillus subtilis MTCC (9102). World J Microbiol Biotechnol 24:2741–2745
Wang S-L, Hsu W-T, Liang T-W, Yen Y-H, Wang C-L (2008) Purification and characterization of three novel keratinolytic metalloproteases produced by Chryseobacterium indologenes TKU014 in a shrimp shell powder medium. Bioresour Technol 99:5679–5686. https://doi.org/10.1016/j.biortech.2007.10.024
Gradišar H, Friedrich J, Križaj I, Jerala R (2005) Similarities and specificities of fungal keratinolytic proteases: comparison of keratinases of Paecilomyces marquandii and Doratomyces microsporus to some known proteases. Appl Environ Microbiol 71:3420–3426. https://doi.org/10.1128/AEM.71.7.3420-3426.2005
Author information
Authors and Affiliations
Contributions
KGP, RM, HS (undergraduate students) performed experiments and collected review of literature. AP, HKM (Ph.D. students) performed experiments, analyzed, and wrote the manuscript. SSM reviewed and edited the manuscript. AF contributed to conceptualization, writing, and editing the manuscript.
Corresponding authors
Ethics declarations
Conflict of Interest
The authors declare that they have no conflict of interest.
Additional information
Publisher's Note
Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
Significant Statement: The study describes the isolation, and identification of an alkalophilic and thermoactive keratinase producing microorganism that can be an eco-friendly and cost-effective alternative in feather waste management and production of feed by-products.
Rights and permissions
Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
About this article
Cite this article
Priyanka, K.G., Mouneesha, R., Sushma, H. et al. Isolation and Biochemical Properties of Extremophilic Keratinase from Bacillus cereus FC1365. Proc. Natl. Acad. Sci., India, Sect. B Biol. Sci. 93, 721–729 (2023). https://doi.org/10.1007/s40011-023-01472-5
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s40011-023-01472-5