NOTE] Initial Acidic pH Is Critical for Mycelial Cultures and Functional Exopolysaccharide Production of an Edible Mushroom, Laetiporus sulphureus var. miniatus JM 27

Min Jeong Seo; Min Jeong Kim; Hye Hyeon Lee; Sung Ryeal Kim; Byoung Won Kang; Jeong Uck Park; En Ju Rhu; Yung Hyun Choi; Yong Kee Jeong

doi:10.1007/s12275-010-0410-5

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NOTE] Initial Acidic pH Is Critical for Mycelial Cultures and Functional Exopolysaccharide Production of an Edible Mushroom, Laetiporus sulphureus var. miniatus JM 27: Min Jeong Seo ¹, Min Jeong Kim ², Hye Hyeon Lee ², Sung Ryeal Kim ², Byoung Won Kang ³, Jeong Uck Park ³, En Ju Rhu ⁴, Yung Hyun Choi ⁵, Yong Kee Jeong ^1,2,3; Journal of Microbiology 2010;48(6):881-884
DOI: https://doi.org/10.1007/s12275-010-0410-5
Published online: January 9, 2011

¹Department of Medical Bioscience, Dong-A University, Busan 604-714, Republic of Korea, ²Department of Biotechnology, Dong-A University, Busan 604-714, Republic of Korea, ³Medi-Farm Industrialization Research Center, Dong-A University, Busan 604-714, Republic of Korea, ⁴Department of Cosmetology, Hanseo University, Chung Nam 356-706, Republic of Korea, ⁵Department of Biochemistry, College of Oriental Medicine, Dong-Eui University, Busan 614-050, Republic of Korea¹Department of Medical Bioscience, Dong-A University, Busan 604-714, Republic of Korea, ²Department of Biotechnology, Dong-A University, Busan 604-714, Republic of Korea, ³Medi-Farm Industrialization Research Center, Dong-A University, Busan 604-714, Republic of Korea, ⁴Department of Cosmetology, Hanseo University, Chung Nam 356-706, Republic of Korea, ⁵Department of Biochemistry, College of Oriental Medicine, Dong-Eui University, Busan 614-050, Republic of Korea

Corresponding author: Yong Kee Jeong , Tel: +82-51-200-7557,

Received: 7 October 2010 • Accepted: 3 December 2010

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Abstract

We conducted a time course experiment on mycelial cultures of Laetiporus sulphureus var. miniatus. The strain showed significant survival in an initial pH range of 2.0 to 7.0 for 24 days, during which time oxalic acid was accumulated. A structural analysis of purified exopolysaccharide suggested that it contained 96.1% glucose, and the mode of linkage was mainly-4-Glcp-(1-units, with branches at the C-6 position consisting of a Glcp-(1-4) linked side chain. An exopolysaccharide purified from the acidophilic strain was added to cultured U937 cells, resulting in significantly increased transcription levels of p53 and p21 genes.

Keywords: mushroom; Laetiporus sulphureus var. miniatus; oxalic acid; p53; U937

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NOTE] Initial Acidic pH Is Critical for Mycelial Cultures and Functional Exopolysaccharide Production of an Edible Mushroom, Laetiporus sulphureus var. miniatus JM 27

J. Microbiol. 2010;48(6):881-884. Published online January 9, 2011

DOI: https://doi.org/10.1007/s12275-010-0410-5

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