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Pigment biosynthesis and virulence.
A A Brakhage et al.
Contributions to microbiology, 2, 205-215 (1999-10-16)
E Thines et al.
The Journal of antibiotics, 51(4), 387-393 (1998-06-19)
From submerged cultures of Scytalidium sp. 36-93, ten metabolites were isolated due to their effects on dihydroxynaphthalene (DHN) or DOPA melanin biosynthesis. Four of the compounds, scytalols A (1a), B (1b), C (2) and D (3), are new secondary metabolites
Jeong-Joo Oh et al.
Journal of microbiology (Seoul, Korea), 58(8), 648-656 (2020-05-20)
As melanin has emerged as functional pigment with cosmetic, health and food applications, the demand for the pigments is expected to increase. However, the conventional sources (e.g. mushroom, hair, and wool) of melanin production entail pigments inside the substrates which
I Kutay Ozturk et al.
Fungal genetics and biology : FG & B, 106, 42-50 (2017-07-12)
Fungal secondary metabolites have many important biological roles and some, like the toxic polyketide aflatoxin, have been intensively studied at the genetic level. Complete sets of polyketide synthase (PKS) genes can now be identified in fungal pathogens by whole genome
E S Jacobson et al.
Infection and immunity, 63(12), 4944-4945 (1995-12-01)
1,8-Dihydroxynaphthalene melanin in Wangiella dermatitidis and Alternaria alternata was titrated in vivo with the oxidants permanganate, hypochlorite, and H2O2. Melanized strains neutralized more oxidant and withstood higher concentrations of permanganate and hypochlorite than albino strains did. H2O2 killing required 1,000-fold
Hong Jiang et al.
Gene, 602, 8-15 (2016-11-16)
A PKS1 gene responsible for the melanin biosynthesis and a NPG1 gene in Aureobasidium melanogenum XJ5-1 were cloned and characterized. An ORF of the PKS1 gene encoding a protein with 2165 amino acids contained 6495bp while an ORF of the
Shao Yu Lin et al.
Molecular plant-microbe interactions : MPMI, 25(12), 1552-1561 (2012-09-01)
Both Colletotrichum and Magnaporthe spp. develop appressoria pigmented with melanin, which is essential for fungal pathogenicity. 1,8-Dihydroxynaphthalene (1,8-DHN) is believed to be polymerized to yield melanin around the appresorial cell wall through the oxidative activity of laccases. However, no 1,8-DHN
First report of a permanent open form of a naphthopyran
Martins CI, et al.
Tetrahedron Letters, 43, 2203-2205 (2002)
Claudia Pacelli et al.
Life (Basel, Switzerland), 10(8) (2020-08-06)
One of the primary current astrobiological goals is to understand the limits of microbial resistance to extraterrestrial conditions. Much attention is paid to ionizing radiation, since it can prevent the preservation and spread of life outside the Earth. The aim
Total synthesis and antifungal activity of palmarumycin CP17 and its methoxy analogues
Wang R, et al.
Molecules (Basel), 21, 600-600 (2016)
Fen Wang et al.
Molecular plant-microbe interactions : MPMI, 33(11), 1315-1329 (2020-08-21)
The role of NADPH oxidases (NOXs) in pathogenesis and development in the Curvularia leaf spot agent Curvularia lunata remains poorly understood. In this study, we identified C. lunata ClNOX2, which localized to the plasma membrane and was responsible for reactive
N A Yurlova et al.
Studies in mycology, 61, 39-49 (2008-01-01)
Dothideaceous black yeast-like fungi (BYF) are known to synthesise DHN-melanin that is inhibited by the systemic fungicide tricyclazole. The final step of the DHN melanin pathway is the conjoining of 1,8-DHN molecules to form the melanin polymer. There are several
Synthesis of spiromamakone a benzo analogues via double oxa-michael addition of 1, 8-dihydroxynaphthalene
Tsukamoto H, et al.
Organic Letters, 18, 4848-4851 (2016)
Bo Wang et al.
BMC genomics, 18(1), 729-729 (2017-09-17)
Ectophytic fungi occupy the waxy plant surface, an extreme environment characterized by prolonged desiccation, nutrient limitation, and exposure to solar radiation. The nature of mechanisms that facilitate adaptation to this environment remains unclear. In this study, we sequenced the complete
R Romero-Martinez et al.
Infection and immunity, 68(6), 3696-3703 (2000-05-19)
Sporothrix schenckii is a human pathogen that causes sporotrichosis, an important cutaneous mycosis with a worldwide distribution. It produces dark-brown conidia, which infect the host. We found that S. schenckii synthesizes melanin via the 1,8-dihydroxynaphthalene pentaketide pathway. Melanin biosynthesis in
H F Tsai et al.
Journal of bacteriology, 180(12), 3031-3038 (1998-06-11)
Aspergillus fumigatus, an important opportunistic pathogen which commonly affects neutropenic patients, produces conidia with a bluish-green color. We identified a gene, alb1, which is required for conidial pigmentation. The alb1 gene encodes a putative polyketide synthase, and disruption of alb1
P A Geis et al.
Archives of microbiology, 137(4), 324-328 (1984-04-01)
Melanin synthesis in the dematiaceous, polymorphic hyphomycete Wangiella dermatitidis, a human pathogen, was investigated by biochemical and physiological techniques. Mutants with a decrease or loss in melanin synthesis were induced and isolated. Melanin precursors were obtained from the mutants, purified
Tuyetnhu Pham et al.
Medical mycology, 58(8), 1178-1186 (2020-03-15)
Aspergillus fumigatus is the most common opportunistic human fungal pathogen responsible for invasive aspergillosis. Gene manipulation is critical for the investigation of A. fumigatus biology and pathogenesis at the molecular level, and it often requires integration of the introduced DNA
H F Tsai et al.
The Journal of biological chemistry, 276(31), 29292-29298 (2001-05-15)
Chain lengths and cyclization patterns of microbial polyketides are generally determined by polyketide synthases alone. Fungal polyketide melanins are often derived from a pentaketide 1,8-dihydroxynaphthalene, and pentaketide synthases are used for synthesis of the upstream pentaketide precursor, 1,3,6,8-tetrahydroxynaphthalene (1,3,6,8-THN). However
C Ganesh Kumar et al.
Letters in applied microbiology, 53(3), 350-358 (2011-07-06)
The aim of the study is to isolate and characterize a melanin pigment from a new strain of Aspergillus bridgeri isolated from rhizosphere soil of Eucalyptus tree and to investigate its antioxidant activity. The extracellular pigment was alkali soluble, acid-resistant
Jung-Kul Lee et al.
Applied and environmental microbiology, 69(6), 3427-3434 (2003-06-06)
The yeast Torula corallina is a strong erythritol producer that is used in the industrial production of erythritol. However, melanin accumulation during culture represents a serious problem for the purification of erythritol from the fermentation broth. Melanin biosynthesis inhibitors such
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