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Preliminary characterization of a novel β-agarase from Thalassospira profundimonas
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2016-07-15
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Zeng C, Zhang L, Miao S, Zhang Y, Zeng S, Zheng B. Preliminary characterization of a novel β-agarase from Thalassospira profundimonas. Springerplus. 2016 Jul 15;5(1):1086. doi: 10.1186/s40064-016-2748-6. PMID: 27468386; PMCID: PMC4947071.
Abstract
Background
The objective of this study was to characterize the agarase from a newly isolated agarolytic bacterium Thalassospira profundimaris fst-13007.
Results
Agarase-fst was purified to homogeneity which apparent molecular weight was 66.2 kDa. Its activity was optimal at 45 °C and pH 8 and was stable at pH 5–9 or 30–50 °C. Agarase-fst required Mn2+ for agarase activity and inhibition by Cu2+, Fe3+ and EDTA. Tests of hydrolysis pattern and substrate specificity, TLC analysis and mass spectrometry of the hydrolysis products revealed that it is an endo-type β-agarase hydrolyzing agarose into neoagarobiose, neoagarotetraose and neoagarohexaose. Results of MALDI-TOF-TOF/MS indicate that it lack of homology to previously identified proteins and present conserved domain of β-agarase.
Conclusion
Agarase-fst from T. profundimaris fst-13007 was confirmed to be a novel endo-type β-agarase.