title: Extracellular phycoerythrin-like protein released by freshwater cyanobacteria Oscillatoria and Scytonema sp.
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.
authors.affiliation: Department of Applied and Environmental Biology, Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamada-oka, Suita, Osaka, 565-0871, Japan.
authors.lastname: Karseno
authors.forename: Kazuo
authors.initials: K
authors.lastname: Harada
authors.forename: Takeshi
authors.initials: T
authors.lastname: Bamba
authors.forename: Susilaningsih
authors.initials: S
authors.lastname: Dwi
authors.forename: Aparat
authors.initials: A
authors.lastname: Mahakhant
authors.forename: Tomoaki
authors.initials: T
authors.lastname: Yoshikawa
authors.forename: Kazumasa
authors.initials: K
authors.lastname: Hirata
mesh_terms: D000818:Animals; D001426:Bacterial Proteins / Q000096:biosynthesis*; D016825:Chlamydomonas reinhardtii / Q000187:drug effects / Q000254:growth & development; D002708:Chlorella / Q000187:drug effects / Q000254:growth & development; D000458:Cyanobacteria / Q000302:isolation & purification / Q000378:metabolism*; D005618:Fresh Water / Q000382:microbiology*; D006131:Growth Inhibitors / Q000096:biosynthesis / Q000737:chemistry / Q000494:pharmacology; D020128:Inhibitory Concentration 50; D008970:Molecular Weight; D054300:Oscillatoria / Q000302:isolation & purification / Q000378:metabolism*; D010799:Phycoerythrin / Q000096:biosynthesis* / Q000737:chemistry / Q000494:pharmacology; D010860:Pigments, Biological / Q000096:biosynthesis / Q000737:chemistry / Q000494:pharmacology; D013057:Spectrum Analysis
chemical_list: D001426:Bacterial Proteins; D006131:Growth Inhibitors; D010860:Pigments, Biological; D010799:Phycoerythrin