Extracellular phycoerythrin-like protein released by freshwater cyanobacteria Oscillatoria and Scytonema sp. |
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| Authors: | Karseno Kazuo Harada Takeshi Bamba Susilaningsih Dwi Aparat Mahakhant Tomoaki Yoshikawa Kazumasa Hirata |
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| Affiliation: | (1) Department of Applied and Environmental Biology, Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamada-oka, Suita, Osaka 565-0871, Japan;(2) Research and Development Center for Biotechnology, The Indonesian Institute of Sciences, Jl. Raya Bogor Km. 46, Cibinong, 16911, Bogor, Indonesia;(3) Thailand Institute of Scientific and Technological Research, Chatuchack, Bangkok, 10900, Thailand |
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| Abstract: | During growth of the freshwater cyanobacteria, Oscillatoria sp. BTCC/A0004, and Scytonema sp. TISTR 8208, a pink pigment is released into the growth medium. The pigment from each source had a molecular weight of approximately 250 kDa and had adsorption maxima at 560 and 620 nm. These results suggest that pink pigment is a phycoerythrin-like protein. It inhibited the growth of green algae, Chlorella fusca and Chlamydomonas reinhardtii, but not other cyanobacteria or true bacteria. The concentration at which growth inhibition 50% occurred was 0.5, 6 and more than 10 mg ml−1, respectively. |
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| Keywords: | Extracellular pigment Oscillatoria sp. Phycoerythrin-like protein Scytonema sp |
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