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Characterization of melanin-overproducing transposon mutants of Pseudomonas putida F6
dc.creator | Nikodinović-Runić, Jasmina | |
dc.creator | Martin, Leona B. | |
dc.creator | Babu, Ramesh P. | |
dc.creator | Blau, Werner | |
dc.creator | O'Connor, Kevin E. | |
dc.date.accessioned | 2018-11-22T00:15:04Z | |
dc.date.available | 2018-11-22T00:15:04Z | |
dc.date.issued | 2009 | |
dc.identifier.issn | 0378-1097 | |
dc.identifier.uri | https://cherry.chem.bg.ac.rs/handle/123456789/1008 | |
dc.description.abstract | Two melanin-overproducing Pseudomonas putida F6 mutants were generated using transposon (Tn5) mutagenesis. Mutants were disrupted in a transcriptional regulator (TR) and a homogentisate 1,2-dioxygenase (HDO) gene. Colonies of mutant F6-TR overproduced a black pigment on solid medium. The same mutant (F6-TR) had a 3.7-fold higher tyrosinase activity compared with the wild-type strain when induced with ferulic acid. However in tyrosine uptake assays whole cells of the mutant strain F6-TR consumed eight times less tyrosine compared with the wild-type strain. Mutant F6-HDO produced a diffusible red pigment into the growth medium. Pigment production by mutant F6-HDO is sixfold higher than the wild-type strain. The biomass yield of mutant F6-HDO grown on tyrosine as the sole source of carbon and energy was 1.2-fold lower than the wild-type strain. While the growth of the wild-type strain was completely inhibited by 5 min of exposure to UV light (254 nm) both mutant strains showed survival rates gt 30%. Mutant F6-HDO was able to tolerate higher concentrations of hydrogen peroxide (H(2)O(2)) exhibiting 1.5 times smaller zones of inhibition at 10 mM H(2)O(2) compared with mutant F6-TR and the wild-type strain. The pigments produced by all strains were purified and confirmed to be melanins. | en |
dc.publisher | Wiley-Blackwell Publishing, Inc, Malden | |
dc.rights | restrictedAccess | |
dc.source | FEMS Microbiology Letters / Federation of European Microbiological Societies | |
dc.subject | melanin | en |
dc.subject | tyrosinase | en |
dc.subject | Pseudomonas putida F6 | en |
dc.title | Characterization of melanin-overproducing transposon mutants of Pseudomonas putida F6 | en |
dc.type | article | |
dc.rights.license | ARR | |
dcterms.abstract | Никодиновић-Рунић, Јасмина; Блау, Wернер; О'Цоннор, Кевин Е.; Бабу, Рамесх; Мартин, Леона Б.; | |
dc.citation.volume | 298 | |
dc.citation.issue | 2 | |
dc.citation.spage | 174 | |
dc.citation.epage | 183 | |
dc.identifier.wos | 000269056800006 | |
dc.identifier.doi | 10.1111/j.1574-6968.2009.01716.x | |
dc.citation.other | 298(2): 174-183 | |
dc.citation.rank | M23 | |
dc.identifier.pmid | 19624744 | |
dc.description.other | Free full text: [https://doi.org/10.1111/j.1574-6968.2009.01716.x] | |
dc.type.version | publishedVersion | en |
dc.identifier.scopus | 2-s2.0-68949211949 |