Melanin as the spore wall pigment of some myxomycetes

Loganathan, P.; Paramasivan, P.; Kalyanasundaram, Indira

doi:10.1016/s0953-7562(89)80067-x

Cited by 15 publications

(5 citation statements)

References 9 publications

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“…Our earlier studies have established that melanin is the major spore wall pigment in the myxomycetes [5,6]. The present study indicates that Myxomycete species may serve as a possible source of the therapeutically important compound, DL-DOPA.…”

Section: Resultssupporting

confidence: 62%

Production of DL-DOPA from acellular slime-mould Stemonitis herbatica

Loganathan

1998

Bioprocess Engineering

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3,4-dihydroxyphenylalanine (L-DOPA) is a neurotransmitter precursor and hence has wide therapeutic applications. Our earlier studies have shown that the melanin in sporangia of the myxomycete species Stemonitis herbatica is DOPA melanin, and that it is possible to extract the precursor DL-DOPA from differentiating plasmodia. The production of DL-DOPA from this species might be commercially viable.

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Section: Resultssupporting

confidence: 62%

Production of DL-DOPA from acellular slime-mould Stemonitis herbatica

Loganathan

1998

Bioprocess Engineering

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“…Pigments in the dark‐spored Myxomycetes have been identified as melanins (Loganathan et al. ). The pigments of Clastodermataceae have not been yet identified; we assume that they should be melanins too.…”

Section: Discussionmentioning

confidence: 99%

Phylogeny of the Highly Divergent Echinosteliales (Amoebozoa)

Kretzschmar

Kuhnt²,

Bonkowski

et al. 2016

J Eukaryotic Microbiology

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Myxomycetes or plasmodial slime molds are widespread and very common soil amoebae with the ability to form macroscopic fruiting bodies. Even if their phylogenetic position as a monophyletic group in Amoebozoa is well established, their internal relationships are still not entirely resolved. At the base of the most intensively studied dark-spored clade lies the order Echinosteliales, whose highly divergent small subunit ribosomal (18S) RNA genes represent a challenge for phylogenetic reconstructions. This is because they are characterized by unusually long variable helices of unknown secondary structure and a high inter- and infraspecific divergence. Current classification recognizes two families: the monogeneric Echinosteliaceae and the Clastodermataceae with the genera Barbeyella and Clastoderma. To better resolve the phylogeny of the Echinosteliales, we obtained three new small subunit ribosomal (18S) RNA gene sequences of Clastoderma and Echinostelium corynophorum. Our phylogenetic analyses suggested the polyphyly of the family Clastodermataceae, as Barbeyella was more closely related to Echinostelium arboreum than to Clastoderma, while Clastoderma debaryanum was the earliest branching clade in Echinosteliales. We also found that E. corynophorum was the closest relative of the enigmatic Semimorula liquescens, a stalkless-modified Echinosteliales. We discuss possible evolutionary pathways in dark-spored Myxomycetes and propose a taxonomic update.

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“…However, by virtue of their color and the presence of aromatic nuclei, they have often been referred to äs 'melanins', although there is relatively little chemical evidence to support a close chemical relationship with that class of animal pigments (Rast et al 1981). Materials described äs melanins have also been noted in the spore walls of various myxomycetes (Aldrich and Blackwell 1976;Loganathan et al 1988). In addition to the melanin, which can constitute ca.…”

Section: Laccase Functionmentioning

confidence: 99%

Laccase and the Deposition of Lignin in Vascular Plants

Dean¹,

Eriksson²

1994

HFSG

157

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Laccase (p-diphenolrOi oxidoreductase, EC 1.10.3.2) was the first enzyme used to polymerize a synthetic lignin (DHP) in vitro. Based on that work, laccase was proposed to perform the same function in vivo. However, various biochemical and histological studies eventually led most researchers to believe that peroxidases, not laccases, were principally responsible for monolignol polymerization in vascular plants. Recent evidence from several laboratories necessitates a re-evaluation of the relative roles played by oxidases and peroxidases in lignin deposition. In this paper, we review the current literature regarding plant laccases, äs well äs selected fungal laccases. From this body of evidence, we have developed a model for the evolution of lignin äs a structural polymer, and we describe how this model may be used to develop new questions regarding the origins of lignin and vascular plants.

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Melanin as the spore wall pigment of some myxomycetes

Cited by 15 publications

References 9 publications

Production of DL-DOPA from acellular slime-mould Stemonitis herbatica

Production of DL-DOPA from acellular slime-mould Stemonitis herbatica

Phylogeny of the Highly Divergent Echinosteliales (Amoebozoa)

Laccase and the Deposition of Lignin in Vascular Plants

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