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KMID : 1094720200250030394
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Biotechnology and Bioprocess Engineering
2020 Volume.25 No. 3 p.394 ~ p.402
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Functional Microbial Pigments Isolated from Chryseobacterium and Deinococcus species for Bio-paint Application
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Park Seo-A
Ahn Soo-Yeon
Choi Kwon-Young
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Abstract
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In this study, bioproduction and application of a microbial pigment from Chryseobacterium and Deinococcus species screened from soil were investigated. The pigments extracted from both cell cultures were identified as a flexirubin (FL)- and deinoxanthin-type (DX). The isolated pigments showed a mass value of 618.48 and 584.41 m/z by LC/MS, respectively. Flask production of the crude FL pigment in complex medium yielded 0.443 ± 0.047 g/L, while crude DX production was less than 20 mg/L. Similar to previously identified FL and DX pigments, both have unsaturated long-chain alkyl-substituted phenol and cyclo-hexanone units and showed excellent radical scavenging capacities of 0.6 and 3.2 mg/mL IC50 values, respectively. In order to utilize the pigments for functional painting materials, both pigments were mixed with casein paint to prepare FL bio-paint and DX bio-paint, respectively. Interestingly, yellow-colored FL bio-paint and red-colored DX bio-paint showed an outstanding coloration and coating performance onto glass plate. Furthermore, it was confirmed that the produced DX bio-paint had a unique crystal structure when analyzed by SEM.
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KEYWORD
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Chryseobacterium species, Deinococcus species, flexirubin, deinoxanthin, bio-paints
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