Results 1 to 10 of about 2,324 (212)

Evolution, Expression Patterns, and Distribution of Novel Ribbon Worm Predatory and Defensive Toxins [PDF]

Molecular Biology and Evolution, 2022
Abstract Ribbon worms are active predators that use an eversible proboscis to inject venom into their prey and defend themselves with toxic epidermal secretions. Previous work on nemertean venom has largely focused on just a few species and has not investigated the different predatory and defensive secretions in detail. Consequently, our
Cesar Cárdenas, Sonia Andrade, Brett Hamilton   +2 more
exaly   +9 more sources

Ribbon worm relationships: a phylogeny of the phylum Nemertea [PDF]

Proceedings of the Royal Society B: Biological Sciences, 2003
We present the most extensive phylogenetic analysis to date, to our knowledge, of higher-level nemertean relationships, based on sequence data from four different genes (the nuclear genes for nuclear large subunit rRNA (28S rRNA) and histone H3 (H3), and the mitochondrial genes for mitochondrial large subunit rRNA (16S rRNA) and cytochrome c oxidase ...
Jon L Norenburg, Mikael Thollesson
exaly   +5 more sources

The Bacterial (Vibrio alginolyticus) Production of Tetrodotoxin in the Ribbon Worm Lineus longissimus—Just a False Positive? [PDF]

Marine Drugs, 2016
We test previous claims that the bacteria Vibrio alginolyticus produces tetrodotoxin (TTX) when living in symbiosis with the nemertean Lineus longissimus by a setup with bacteria cultivation for TTX production. Toxicity experiments on the shore crab, Carcinus maenas, demonstrated the presence of a paralytic toxin, but evidence from LC-MS and ...
Per Sundberg, Erik Jacobsson, Ulf Göransson   +2 more
exaly   +6 more sources

Investigating Non-Native Ribbon Worm Cephalothrix simula as a Potential Source of Tetrodotoxin in British Bivalve Shellfish [PDF]

Marine Drugs
Tetrodotoxin (TTX) is a potent marine neurotoxin found in several phylogenetically diverse organisms, some of which are sought as seafood. Since 2015, TTX has been reported in bivalve shellfish from several estuarine locations along the Mediterranean and
Monika Dhanji-Rapkova, Robert G. Hatfield, David I. Walker, Chantelle Hooper, Sarah Alewijnse, Craig Baker-Austin, Andrew D. Turner, Jennifer M. Ritchie   +7 more
doaj   +2 more sources

Molecular Phylogeny of the Genus Nipponnemertes (Nemertea: Monostilifera: Cratenemertidae) and Descriptions of 10 New Species, With Notes on Small Body Size in a Newly Discovered Clade

Frontiers in Marine Science, 2022
Nemerteans, or ribbon worms, have been reported from intertidal to hadal depths, often showing bathymetrically wide distribution in genus levels. Although current nemertean systematics practices require to provide DNA sequences and infer phylogenetic ...
Natsumi Hookabe, Hiroshi Kajihara, Alexei V. Chernyshev, Naoto Jimi, Naoto Jimi, Naohiro Hasegawa, Hisanori Kohtsuka, Masanori Okanishi, Masanori Okanishi, Kenichiro Tani, Yoshihiro Fujiwara, Shinji Tsuchida, Rei Ueshima   +12 more
doaj   +1 more source

The First Data on the Complete Genome of a Tetrodotoxin-Producing Bacterium

Toxins, 2021
Tetrodotoxin (TTX)-producing bacteria have attracted great interest as a model system for study of the TTX biosynthetic route. Here, we report the complete genome of the TTX-producing bacterium Bacillus sp. 1839.
Daria I. Melnikova, Reindert Nijland, Timur Yu. Magarlamov   +2 more
doaj   +1 more source

Seven new species of Tetranemertes Chernyshev, 1992 (Monostilifera, Hoplonemertea, Nemertea) from the Caribbean Sea, western Pacific, and Arabian Sea, and revision of the genus [PDF]

ZooKeys, 2023
The marine ribbon worm genus Tetranemertes Chernyshev, 1992 currently includes three species: the type species T. antonina (Quatrefages, 1846) from the Mediterranean Sea, T. rubrolineata (Kirsteuer, 1965) from Madagascar, and T.
Irina Cherneva, Christina I. Ellison, Eduardo E. Zattara, Jon L. Norenburg, Megan L. Schwartz, Juan Junoy, Svetlana A. Maslakova   +6 more
doaj   +3 more sources

Intrabody Tetrodotoxin Distribution and Possible Hypothesis for Its Migration in Ribbon Worms Cephalothrix cf. simula (Palaeonemertea, Nemertea)

Marine Drugs, 2021
Tetrodotoxin (TTX) is a potent neurotoxin found in many marine and terrestrial animals, but only a few species, such as the ribbon worms of the genus Cephalothrix, accumulate it in extremely high concentrations.
Grigorii V. Malykin, Alexei V. Chernyshev, Timur Yu. Magarlamov   +2 more
doaj   +1 more source

Characterization and phylogenetic analysis of the complete mitochondrial genome of the marine ribbon worm Cephalothrix species (nemertea: Palaeonemertea)

Mitochondrial DNA. Part B. Resources, 2020
Here, we report the complete mitochondrial genome of the marine nemertean Cephalothrix species collected from the coastal region of South Korea. The mitochondrial genome of Cephalothrix sp.
Sang-Eun Nam, Jae-Sung Rhee
doaj   +1 more source

Nanomechanical Characterization of Apolipoprotein A-I Amyloid Fibrils

East European Journal of Physics, 2020
Amyloid fibrils represent a special type of protein aggregates that are currently receiving enormous attention due to their strong implication in molecular etiology of a wide range of human disorders.
Valeriya Trusova, Kateryna Vus, Olga Zhytniakivska, Uliana Tarabara, Hiroyuki Saito, Galyna Gorbenko   +5 more
doaj   +1 more source