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All Journal Biodiversitas Journal of Biological Diversity
AKIRA YOKOTA
Department of Microbial Resources, Graduate School of Agricultural Sciences, Tohoku University, 468-1 Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-0845, Japan
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology

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Cellulolytic enzyme-producing thermophilic Actinobacteria isolated from the soil of Cisolok Geysers, West Java, Indonesia PUTRI PRATIWI SETYANINGSIH; FITRIA NINGSIH; MAZYTHA KINANTI RACHMANIA; WINDA AYU SYAFITRI; DHIAN CHITRA AYU FITRIA SARI; SHUHEI YABE; AKIRA YOKOTA; ARIYANTI OETARI; Wellyzar Sjamsuridzal
Biodiversitas Journal of Biological Diversity Vol. 20 No. 11 (2019)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d201105

Abstract

Abstract. Setyaningsih PP, Ningsih F, Rachmania MK, Syafitri WA, Sari DCAF, Yabe S, Yokota A, Oetari A, Sjamsuridzal W. 2019. Cellulolytic enzyme-producing thermophilic Actinobacteria isolated from the soil of Cisolok Geysers, West Java, Indonesia. Biodiversitas 20: 3134-3141. This study investigated 17 thermophilic Actinobacteria isolated from the soil of geysers in the Cisolok geothermal area, West Java, as potential producers of cellulase. Screening for cellulase was performed on minimal (Mm) agar medium with and without the addition of 1% (w/v) carboxymethylcellulose (CMC) and microcrystalline cellulose (MCC), then incubated at 45, 50, 55 and 60°C for up to 7 days. Formation of clear zones around colonies indicated cellulose hydrolysis. The results showed that 15, 14, 4, and 3 isolates showed cellulolytic activity on CMC agar medium at 45, 50, 55, and 60°C, respectively, after 7 days of incubation. Three potential isolates showed cellulolytic activity on MCC agar medium after being incubated for 7 days at 45°C. Molecular identification based on the 16S rRNA gene was performed for three isolates with positive cellulolytic activity at 60°C. The results showed that the three isolates are closely related to Actinomadura keratinilytica WCC-2265T with 99.93-100% sequence similarities. A phylogenetic tree based on 16S rRNA gene sequences confirmed that the three isolates were clustered together with Actinomadura keratinilytica WCC-2265T with 100% bootstrap value. The tree also showed that cellulase producers and non-cellulase producers in Thermomonosporaceae are grouped into different clades.
Xylan-degrading ability of thermophilic Actinobacteria from soil in a geothermal area MAZYTHA KINANTI RACHMANIA; FITRIA NINGSIH; PUTRI PRATIWI SETYANINGSIH; WINDA AYU SYAFITRI; DHIAN CHITRA AYU FITRIA SARI; SHUHEI YABE; AKIRA YOKOTA; ARIYANTI OETARI; Wellyzar Sjamsuridzal
Biodiversitas Journal of Biological Diversity Vol. 21 No. 1 (2020)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d210119

Abstract

Abstract. Rachmania MK, Ningsih F, Setyaningsih PP, Syafitri WA, Sari DCAF, Yabe S, Yokota A, Oetari A, Sjamsuridjal W. 2020. Xylan-degrading ability of thermophilic Actinobacteria isolated from soil in a geothermal area. Biodiversitas 21: 144-154. This study was conducted to obtain the potential isolates of xylan-degrading thermophilic Actinobacteria. Seventeen isolates were obtained from the soil samples collected from Cisolok geysers in West Java, Indonesia. These isolates were screened for their xylan-degrading ability on minimal medium with the addition of 0.5% xylan as substrate, and were incubated at various temperatures for 7 days. A total of 15, 14, 4, and 3 isolates showed a xylan-degrading ability at 45°C, 50°C, 55°C, and 60°C, respectively. The three isolates (SL1-2-R-2, SL1-2-R-3, and SL1-2-R-4) that showed xylan-degrading ability at 60°C on 0.5% xylan were further tested by using minimal medium with the addition of 0.1% RBB-xylan as a substrate. The results showed that these isolates were also able to utilized RBB-xylan at 45 to 60°C. The xylanolytic activity of the crude enzymes from the three isolates on minimal medium containing 0.5% xylan or 0.1% RBB-xylan as substrates, indicated that these isolates were able to produce extracellular xylanase. This study revealed that the soil of Cisolok geysers served as an ideal source for finding the thermophilic Actinobacteria which produced xylanase at high temperatures.
Co-Authors ARIYANTI OETARI ARIYANTI OETARI DHIAN CHITRA AYU FITRIA SARI DHIAN CHITRA AYU FITRIA SARI FITRIA NINGSIH FITRIA NINGSIH MAZYTHA KINANTI RACHMANIA MAZYTHA KINANTI RACHMANIA PUTRI PRATIWI SETYANINGSIH PUTRI PRATIWI SETYANINGSIH SHUHEI YABE Wellyzar Sjamsuridzal Wellyzar Sjamsuridzal WINDA AYU SYAFITRI WINDA AYU SYAFITRI