Extracellular Enzymes Produced by Marine Eukaryotes, Thraustochytrids

Taoka, Yousuke; Nagano, Naoki; Okita, Yuji; Izumida, Hitoshi; Sugimoto, Shinichi; Hayashi, Masahiro

doi:10.1271/bbb.80416

Cited by 67 publications

(38 citation statements)

References 18 publications

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“…None of the Labyrinthulomycetes studied by Bahnweg (1979b) and Taoka et al (2009) hydrolysed chitin.…”

Section: Labyrinthulomycetes As Remineralizers In the Ecosystemmentioning

confidence: 93%

“…Thraustochytrids secrete a wide variety of extracellular enzymes in vitro, such as proteases, lipases, cellulases, amylases, xylanases, gelatinase, urease, phosphatase, chitinase and α-Glucosidase , Bremer and Talbot 1995, Bongiorni et al 2005b, Damare and Raghukumar 2006, Taoka et al 2009, Nagano et al 2010). …”

Section: Labyrinthulomycetes As Remineralizers In the Ecosystemmentioning

confidence: 99%

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Increasing evidence for the important role of Labyrinthulomycetes in marine ecosystems

Raghukumar¹,

Damare

2011

Botanica Marina

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This review summarizes increasing evidence for the role of Labyrithulomycetes in marine ecosystems gathered over the last six decades. It focuses on their diversity, habitats, biomass, productivity and overall role in food webs and remineralization. Earlier studies contributed enormously to the cultured diversity of Labyrinthulomycetes. In recent years, their uncultured diversity has been demonstrated in exotic environments like the deep sea and anoxic waters. These findings emphasize the need for novel culture methods to grow these organisms. Many species seem to be substrate-specific in their occurrence. Their commensalistic or mutualistic occurrence in marine invertebrates deserves attention.The biomass of Labyrinthulomycetes in the water column may often match or even exceed that of bacteria, although such occurrences seem to be seasonal. There is a major knowledge gap on their productivity and turnover in the water column. The high biomass and production of several degradative enzymes indicate their importance as remineralizers in the ocean. However, the mechanisms by which they overcome bacterial competition are not clear. It is likely that they occupy special niches, such as marine aggregates. One role of the Labyrinthulomycetes suggested in this review, based on preliminary experiments, is that of 'left-over scavenging', following bacterial growth.

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“…None of the Labyrinthulomycetes studied by Bahnweg (1979b) and Taoka et al (2009) hydrolysed chitin.…”

Section: Labyrinthulomycetes As Remineralizers In the Ecosystemmentioning

confidence: 93%

Section: Labyrinthulomycetes As Remineralizers In the Ecosystemmentioning

confidence: 99%

Increasing evidence for the important role of Labyrinthulomycetes in marine ecosystems

Raghukumar¹,

Damare

2011

Botanica Marina

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“…All three genera produce a-glucosidase, lipase, phosphatase,protease,andurease;onlythegenusThraustochytrium produces amylase and chitinase (Taoka et al, 2009). …”

Section: Extracellular Enzymesmentioning

confidence: 99%

Thraustochytrids and Ciliates

Kornprobst

2014

Encyclopedia of Marine Natural Products

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The article contains sections titled: Taxonomic Position of Thraustochytrids and Overview of the Group Carotenoids of Thraustochytrids Long‐Chain ( n ‐3) Polyunsaturated Fatty Acids of Thraustochytrids Long‐Chain Fatty Acid Composition and Phylogeny of Thraustochytrids α‐Glucosylceramides of Thraustochytrids Extracellular Enzymes Introduction to the Chemistry of Ciliates Terpenes of Euplotes Photoreceptor Pigments Keronopsins and Keronopsamides of Pseudokeronopsis rubra and P. ricii

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“…Most labyrinthulomycete species are unicellular, and they are ubiquitous in the ocean, and their occurrence and distribution in water column and sediments have been well documented (Kimura et al, 1999, Naganuma et al, 1998, Raghukumar, 2002. Their main ecological role may be as saprotrophic decomposers, recycling nutrients in marine and coastal ecosystems, by chemical alteration of detritus through extra-cellular enzymes (Raghukumar, 2002, Taoka et al, 2009. Their role in facilitating the settlement of barnacle cyprids has also been demonstrated (Raghukumar et al, 2000).…”

Section: Introductionmentioning

confidence: 99%