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Int. J. Mol. Sci. 2011, 12(8), 5294-5303; doi:10.3390/ijms12085294

Characterization of Thermophilic Halotolerant Aeribacillus pallidus TD1 from Tao Dam Hot Spring, Thailand

1
Department of Biochemistry, Faculty of Medicine, Srinakharinwirot University, Bangkok 10110, Thailand
2
Department of Pathology, Faculty of Medicine, Srinakharinwirot University, Bangkok 10110, Thailand
*
Author to whom correspondence should be addressed.
Received: 24 June 2011 / Revised: 28 July 2011 / Accepted: 5 August 2011 / Published: 17 August 2011
(This article belongs to the Section Biochemistry, Molecular Biology and Biophysics)
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Abstract

The bacterial strain TD1 was isolated from Tao Dam hot spring in Thailand. Strain TD1 was Gram positive, rod-shaped, aerobic, motile, and endospore forming. The cell was 2.0–40 mm in length and about 0.4 mm in diameter. The optimum growth occurred at 55–60 °C and at pH 7–8. Strain TD1 was able to grow on medium containing up to 10% NaCl. The DNA G+C content was 38.9 mol%. The cellular fatty acid content was mainly C16:0, which comprised 25.04% of the total amount of cellular fatty acid. 16S rDNA showed 99% identity to Aeribacillus pallidus DSM 3670T. Bayesian tree analysis strongly supported the idea that strain TD1 is affiliated with genus Aeribacillus, as Aeribacillus pallidus strain TD1. Although the 16S rDNA of A. pallidus strain TD1 is similar to that of A. pallidus DSM 3670T, some physiological properties and the cellular fatty acid profiles differ significantly. A. pallidus strain TD1 can produce extracellular pectate lyase, which has not been reported elsewhere for other bacterial strains in the genus Aeribacillus. A. pallidus strain TD1 may be a good candidate as a pectate lyase producer, which may have useful industrial applications.
Keywords: thermophile; halotolerant; Aeribacillus; pectate lyase thermophile; halotolerant; Aeribacillus; pectate lyase
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Yasawong, M.; Areekit, S.; Pakpitchareon, A.; Santiwatanakul, S.; Chansiri, K. Characterization of Thermophilic Halotolerant Aeribacillus pallidus TD1 from Tao Dam Hot Spring, Thailand. Int. J. Mol. Sci. 2011, 12, 5294-5303.

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