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Complete Genome Sequence of Thermoactinomyces vulgaris Strain CDF, a Thermophilic Bacterium Capable of Degrading Chicken Feathers.

ABSTRACT: Thermoactinomyces vulgaris strain CDF was isolated from soil and shown to have the ability to degrade chicken feathers at high temperatures. Here, we report the complete genome sequence of this bacterium, which is 2,595,509?bp long with 2,642 predicted genes and an average G+C content of 48.14%.

SUBMITTER: Li B

PROVIDER: S-EPMC6624764 | biostudies-literature | 2019 Jul

REPOSITORIES: biostudies-literature

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Complete Genome Sequence of Thermoactinomyces vulgaris Strain CDF, a Thermophilic Bacterium Capable of Degrading Chicken Feathers.

Li Binbin B Liu Feng F Ren Yuxia Y Ding Yidi Y Li Yu Y Tang Xiao-Feng XF Tang Bing B

Microbiology resource announcements 20190711 28

<i>Thermoactinomyces vulgaris</i> strain CDF was isolated from soil and shown to have the ability to degrade chicken feathers at high temperatures. Here, we report the complete genome sequence of this bacterium, which is 2,595,509 bp long with 2,642 predicted genes and an average G+C content of 48.14%. ...[more]

PMID: 31296681

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Project description:Here, the gene encoding a subtilisin-like protease (protease Als) was cloned from Thermoactinomyces vulgaris strain CDF and expressed in Escherichia coli. The recombinant enzyme was released into the culture medium of E. coli as a mature form (mAls). Purified mAls displayed optimal activity at 60-70°C and pH 10.0 using azo-casein as the substrate, and showed a half-life of 13.8 h at 70°C. Moreover, the activity of thermostable mAls was comparable to or higher than those of mesophilic subtilisin Carlsberg and proteinase K at low temperatures (10-30°C). Protease Als was also stable in several organic solvents and showed high compatibility with commercial laundry detergents. Notably, mAls exhibited approximately 100% of its activity at 3 M NaCl, and showed enhanced thermostability with the increase of NaCl concentration up to 3 M. Protease Als possesses an excess of solvent-accessible acidic amino acid residues, which may account for the high halotolerance of the enzyme. Compared with homologous protease C2 from the same strain, protease Als exhibits substantially lower activity toward insoluble keratin substrates but efficiently hydrolyzes soluble keratin released from chicken feathers. Additionally, direct substitution of the substrate-binding site of protease Als with that of protease C2 improves its activity against insoluble keratin substrates. By virtue of its polyextremotolerant attribute and kerationolytic capacity, protease Als may find broad applications in various industries such as laundry detergents, food processing, non-aqueous biocatalysis, and feather processing.

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