D-mannose isomerase produced from Saccharothrix sp. CMU-k747 and some properties of the crude enzyme
The extracellular mannanase can catalyze the random hydrolysis of the mannan backbone and various polysaccharides consisting mainly of mannose. D-Mannose isomerase (d-MI) is an intracellular enzyme known to catalyze the reversible isomerization of D-mannose and D-fructose. Four hundred and forty fiv...
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th-cmuir.6653943832-513502018-09-04T06:13:56Z D-mannose isomerase produced from Saccharothrix sp. CMU-k747 and some properties of the crude enzyme Apiradee Siangsuepchart Ken Izumori Verasak Sahachaisaree Saisamorn Lumyong Biochemistry, Genetics and Molecular Biology Chemistry Materials Science Mathematics Physics and Astronomy The extracellular mannanase can catalyze the random hydrolysis of the mannan backbone and various polysaccharides consisting mainly of mannose. D-Mannose isomerase (d-MI) is an intracellular enzyme known to catalyze the reversible isomerization of D-mannose and D-fructose. Four hundred and forty five actinomycete strains were screened for mannanase production. In this study, thirty six strains produced mannanase activity and from those d-MI activity was detected in 15 isolates. The results also showed that cell extracts of CMU-K747 isolated from Phatup Cave in Nan province of Thailand, conferred the maximum yield of d-MI activity (0.301 ± 0.006 unit/ml) and mannanase activity (9.141 ± 0.285 unit/ml). Moreover, the optimum pH and temperature for crude d-MI were 8.0 and 40°C, respectively and the enzyme was stable at pH 4.0 to 11.0 (more than 85% of activity was retained). The enzyme from this strain showed thermostability and maintained more than 70% activity when incubated at 40°C for 1 h. The enzyme can catalyze the isomerization of D-mannose and D-lyxose, the specific activity was highest for D-mannose, followed by D-lyxose. Moreover, the equilibrium ratio between D-mannose and D-fructose was 50:50. The morphological and chemotaxonomy data supports that the strain CMU-K747 is non-Streptomyces. In addition, molecular analysis of 16S rDNA sequencing showed that CMU-K747 isolate was highly homologous to genus Saccharothrix with 99% identity. This is the first report of d-MI production by genus Saccharothrix from cave soil. This is the first report on this genus is capable of producing both mannanase and d-MI. 2018-09-04T06:00:38Z 2018-09-04T06:00:38Z 2012-10-01 Journal 01252526 2-s2.0-84869049609 https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84869049609&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/51350 |
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Biochemistry, Genetics and Molecular Biology Chemistry Materials Science Mathematics Physics and Astronomy Apiradee Siangsuepchart Ken Izumori Verasak Sahachaisaree Saisamorn Lumyong D-mannose isomerase produced from Saccharothrix sp. CMU-k747 and some properties of the crude enzyme |
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The extracellular mannanase can catalyze the random hydrolysis of the mannan backbone and various polysaccharides consisting mainly of mannose. D-Mannose isomerase (d-MI) is an intracellular enzyme known to catalyze the reversible isomerization of D-mannose and D-fructose. Four hundred and forty five actinomycete strains were screened for mannanase production. In this study, thirty six strains produced mannanase activity and from those d-MI activity was detected in 15 isolates. The results also showed that cell extracts of CMU-K747 isolated from Phatup Cave in Nan province of Thailand, conferred the maximum yield of d-MI activity (0.301 ± 0.006 unit/ml) and mannanase activity (9.141 ± 0.285 unit/ml). Moreover, the optimum pH and temperature for crude d-MI were 8.0 and 40°C, respectively and the enzyme was stable at pH 4.0 to 11.0 (more than 85% of activity was retained). The enzyme from this strain showed thermostability and maintained more than 70% activity when incubated at 40°C for 1 h. The enzyme can catalyze the isomerization of D-mannose and D-lyxose, the specific activity was highest for D-mannose, followed by D-lyxose. Moreover, the equilibrium ratio between D-mannose and D-fructose was 50:50. The morphological and chemotaxonomy data supports that the strain CMU-K747 is non-Streptomyces. In addition, molecular analysis of 16S rDNA sequencing showed that CMU-K747 isolate was highly homologous to genus Saccharothrix with 99% identity. This is the first report of d-MI production by genus Saccharothrix from cave soil. This is the first report on this genus is capable of producing both mannanase and d-MI. |
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Apiradee Siangsuepchart Ken Izumori Verasak Sahachaisaree Saisamorn Lumyong |
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Apiradee Siangsuepchart Ken Izumori Verasak Sahachaisaree Saisamorn Lumyong |
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Apiradee Siangsuepchart |
title |
D-mannose isomerase produced from Saccharothrix sp. CMU-k747 and some properties of the crude enzyme |
title_short |
D-mannose isomerase produced from Saccharothrix sp. CMU-k747 and some properties of the crude enzyme |
title_full |
D-mannose isomerase produced from Saccharothrix sp. CMU-k747 and some properties of the crude enzyme |
title_fullStr |
D-mannose isomerase produced from Saccharothrix sp. CMU-k747 and some properties of the crude enzyme |
title_full_unstemmed |
D-mannose isomerase produced from Saccharothrix sp. CMU-k747 and some properties of the crude enzyme |
title_sort |
d-mannose isomerase produced from saccharothrix sp. cmu-k747 and some properties of the crude enzyme |
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2018 |
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https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84869049609&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/51350 |
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