MELANOID PIGMENT PRODUCTION IN A STRAIN OF
            <i>TRICHOPHYTON RUBRUM</i>

Zussman, R. A.; Lyon, I.; Vicher, E. E.

doi:10.1128/jb.80.5.708-713.1960

Cited by 29 publications

(9 citation statements)

References 14 publications

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“…Chemical and physical tests that typically identify melanin pigments were carried out as described previously [11,17,18].…”

Section: Properties Of Melanin From a Media Utsa199mentioning

confidence: 99%

“…Crude melanin from A. media UTSA199 showed typical properties of melanins [11,18]. It was insoluble in chloroform, isoamyl alcohol, butanol, ether and ethyl acetate; was precipitated below pH 3 and redissolved only in alkali above pH 10; was precipitated in alkaline FeCl Q , bleached in H P O P and produced a blue colour in FeSO R /ferricyanide; pigment formation was delayed or prevented by ascorbic acid in the growth medium; and was overproduced in medium supplemented with tyrosine.…”

Section: Properties Of Melanin From a Mediamentioning

confidence: 99%

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Melanin and novel melanin precursors from Aeromonas media

Gibson

1998

FEMS Microbiology Letters

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Many bacteria produce reddish brown to black pigments and some of these have been characterised. This report describes the isolation and characterisation of a diffusible brown melanin-like pigment from the bacterium Aeromonas media. Physicochemical testing suggested that the pigment is a true melanin. New butanol-soluble yellow, red and brown pigments were isolated from the A. media strain under reducing conditions during melanogenesis and these pigments were shown to be unstable precursors of the polymeric brown melanin product. z

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“…Chemical and physical tests that typically identify melanin pigments were carried out as described previously [11,17,18].…”

Section: Properties Of Melanin From a Media Utsa199mentioning

confidence: 99%

Section: Properties Of Melanin From a Mediamentioning

confidence: 99%

Melanin and novel melanin precursors from Aeromonas media

Gibson

1998

FEMS Microbiology Letters

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“…The LST pigment is believed to be a melanin, which refers to a class of heteropolymers, the structures and molecular weights of which are determined by availability of monomeric precursors (51) and reaction conditions (49). Cognizant of the obvious difficulties in identification and characterization that these parameters impose, we conclude that the pigment of LST shares physical and chemical properties of pigments identified as melanins (6,28,58).…”

Section: Discussionmentioning

confidence: 89%

“…Solutions were agitated and maintained for at least 30 min, after which they were centrifuged to separate the precipitate. The criteria of Zussman et al (58) were adopted to describe the solubility of the pigment in solvents. Pigments were designated soluble if they dissolved in the solvent, slightly soluble if the solvent became colored but the pigment did not dissolve, and insoluble if no color was imparted to the solvent.…”

Section: Methodsmentioning

confidence: 99%

Characterization of a Marine Bacterium Associated with Crassostrea virginica (the Eastern Oyster)

Weiner

Segall

Colwell

1985

Appl Environ Microbiol

109

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A gram-negative bacterium found to be closely associated with oysters has been isolated and characterized. The organism, designated LST, has a generation time of 106 min in Marine broth under optimal growth conditions at 25°C. During the decline phase of growth, it exhibits a morphological transition from a motile rod (ca. 1 ,um in length) to an elongated, 3to 40-I,m, nonmotile, tightly coiled helix. LST synthesizes and releases a pigment in the 'stationary and decline phases of growth. Identified as melanin on the basis of chemical properties and UV absorbance maxima, the pigment comprises polymners of heterogeneous molecular weights, ranging from 12,000 to 120,000. The guanosine-plus-cytosine content of the LST DNA is 46%, and results of phenetic analysis and DNA-DNA hybridization indicate that this bacterium represents a new species. LST adheres to a variety of surfaces, including glass, plastics, and oyster shell, and has been shown to promote the settlement of oyster larvae.

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“…The presence of the aspergillin pigment explains why A. niger conidia are more resistant to 405 nm radiation than the conidia of T. rubrum, and indeed to the A. niger hyphae which is non-pigmented. Although T. rubrum also produces several melanin-type pigments 29 these either do not occur in the conidia, or at least not at sufficient levels to provide protection against 405 nm light irradiation.…”

Section: Discussionmentioning

confidence: 99%

Comparative Sensitivity of Trichophyton and Aspergillus Conidia to Inactivation by Violet-Blue Light Exposure

Moorhead

Maclean

MacGregor

et al. 2016

Photomedicine and Laser Surgery

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MELANOID PIGMENT PRODUCTION IN A STRAIN OF TRICHOPHYTON RUBRUM

Cited by 29 publications

References 14 publications

Melanin and novel melanin precursors from Aeromonas media

Melanin and novel melanin precursors from Aeromonas media

Characterization of a Marine Bacterium Associated with Crassostrea virginica (the Eastern Oyster)

Comparative Sensitivity of Trichophyton and Aspergillus Conidia to Inactivation by Violet-Blue Light Exposure

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