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https://www.readbyqxmd.com/read/28077580/peptide-from-sea-anemone-metridium-senile-affects-transient-receptor-potential-ankyrin-repeat-1-trpa1-function-and-produces-analgesic-effect
#1
Yulia A Logashina, Irina V Mosharova, Yulia V Korolkova, Irina V Shelukhina, Igor A Dyachenko, Victor A Palikov, Yulia A Palikova, Arkadii N Murashev, Sergey A Kozlov, Klara Stensvåg, Yaroslav A Andreev
The transient receptor potential ankyrin-repeat 1 (TRPA1) is an important player in pain and inflammatory pathways. It is a promising target for novel drug development for the treatment of a number of pathological states. A novel peptide producing a significant potentiating effect on allyl isothiocyanate (AITC)- and diclofenac-induced currents of TRPA1 was isolated from the venom of sea anemone Metridium senile. It is a 35-amino-acid peptide cross-linked by two disulfide bridges, named τ-AnmTX Ms 9a-1 (short name Ms 9a-1) according to a structure similar to other sea anemone peptides belonging to structural group 9a...
January 11, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28073024/anemonefishes
#2
William E Feeney, Rohan M Brooker
Feeney and Brooker introduce sea-anemone associated fish.
January 9, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/28066713/sequencing-and-de-novo-transcriptome-assembly-of-anthopleura-dowii-verrill-1869-from-mexico
#3
Jorge-Tonatiuh Ayala-Sumuano, Alexei Licea-Navarro, Enrique Rudiño-Piñera, Estefanía Rodríguez, Claudia Rodríguez-Almazán
Next-generation technologies for determination of genomics and transcriptomics composition have a wide range of applications. Moreover, the development of tools for big data set analysis has allowed the identification of molecules and networks involved in metabolism, evolution or behavior. By natural habitats aquatic organisms have implemented molecular strategies for survival, including the production and secretion of toxic compounds for their predators; therefore these organisms are possible sources of proteins or peptides with potential biotechnological application...
March 2017: Genomics Data
https://www.readbyqxmd.com/read/28003055/determination-and-speciation-of-cadmium-in-microcosms-with-bunodosoma-caissarum-and-perna-perna-using-isotopically-enriched-116-cd
#4
Nafisa Rizzini Ansari, Nerea Fernández Iglesias, Renato Campello Cordeiro, Marcos Antônio Fernandez, Jörg Bettmer
The study of the uptake and distribution of elements in marine environments is of great interest for understanding their pathways and accumulation. Here, we investigated in laboratory experiments the accumulation behavior of Cd in the sea anemone Bunodosoma caissarum and the mussel Perna perna. Specimens were incubated with isotopically enriched (116)Cd in aquariums. Cd concentrations in the seawater and in the tissues of B. caissarum and P. perna were followed by inductively coupled plasma-mass spectrometry (ICP-MS) by means of isotope dilution analysis...
December 18, 2016: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/27983679/kunitz-type-peptide-hcrg21-from-the-sea-anemone-heteractis-crispa-is-a-full-antagonist-of-the-trpv1-receptor
#5
Margarita Monastyrnaya, Steve Peigneur, Elena Zelepuga, Oksana Sintsova, Irina Gladkikh, Elena Leychenko, Marina Isaeva, Jan Tytgat, Emma Kozlovskaya
Sea anemone venoms comprise multifarious peptides modulating biological targets such as ion channels or receptors. The sequence of a new Kunitz-type peptide, HCRG21, belonging to the Heteractis crispa RG (HCRG) peptide subfamily was deduced on the basis of the gene sequence obtained from the Heteractis crispa cDNA. HCRG21 shares high structural homology with Kunitz-type peptides APHC1-APHC3 from H. crispa, and clusters with the peptides from so named "analgesic cluster" of the HCGS peptide subfamily but forms a separate branch on the NJ-phylogenetic tree...
December 15, 2016: Marine Drugs
https://www.readbyqxmd.com/read/27980125/warm-preconditioning-protects-against-acute-heat-induced-respiratory-dysfunction-and-delays-bleaching-in-a-symbiotic-sea-anemone
#6
Thomas D Hawkins, Mark E Warner
Preconditioning to non-stressful warming can protect some symbiotic cnidarians against the high temperature-induced collapse of their mutualistic endosymbiosis with photosynthetic dinoflagellates (Symbiodinium spp.), a process known as bleaching. Here, we sought to determine if such preconditioning is underpinned by differential regulation of aerobic respiration. We quantified in vivo metabolism and mitochondrial respiratory enzyme activity in the naturally symbiotic sea anemone Exaiptasia pallida preconditioned to 30°C for>7 weeks as well as anemones kept at 26°C...
December 15, 2016: Journal of Experimental Biology
https://www.readbyqxmd.com/read/27941639/evolution-of-the-cytolytic-pore-forming-proteins-actinoporins-in-sea-anemones
#7
Jason Macrander, Marymegan Daly
Sea anemones (Cnidaria, Anthozoa, and Actiniaria) use toxic peptides to incapacitate and immobilize prey and to deter potential predators. Their toxin arsenal is complex, targeting a variety of functionally important protein complexes and macromolecules involved in cellular homeostasis. Among these, actinoporins are one of the better characterized toxins; these venom proteins form a pore in cellular membranes containing sphingomyelin. We used a combined bioinformatic and phylogenetic approach to investigate how actinoporins have evolved across three superfamilies of sea anemones (Actinioidea, Metridioidea, and Actinostoloidea)...
December 8, 2016: Toxins
https://www.readbyqxmd.com/read/27933793/differential-effect-of-membrane-composition-on-the-pore-forming-ability-of-four-different-sea-anemone-actinoporins
#8
Sara García-Linares, Esperanza Rivera-de-Torre, Koldo Morante, Kouhei Tsumoto, Jose M M Caaveiro, José G Gavilanes, J Peter Slotte, Álvaro Martínez-Del-Pozo
Sea anemone actinoporins constitute a protein family of multigene pore-forming toxins (PFT). Equinatoxin II (EqtII), fragaceatoxin C (FraC), and sticholysins I and II (StnI and StnII, respectively), produced by three different sea anemone species, are the only actinoporins whose molecular structures have been studied in depth. These four proteins show high sequence identities and practically coincident three-dimensional structures. However, their pore-forming activity can be quite different depending on the model lipid system employed, a feature that has not been systematically studied before...
December 6, 2016: Biochemistry
https://www.readbyqxmd.com/read/27933775/role-of-the-tryptophan-residues-in-the-specific-interaction-of-the-sea-anemone-stichodactyla-helianthus-s-actinoporin-sticholysin-ii-with-biological-membranes
#9
Sara García-Linares, Terhi Maula, Esperanza Rivera-de-Torre, José G Gavilanes, J Peter Slotte, Álvaro Martínez-Del-Pozo
Actinoporins are pore-forming toxins from sea anemones. Upon interaction with sphingomyelin-containing bilayers, they become integral oligomeric membrane structures that form a pore. Sticholysin II from Stichodactyla helianthus contains five tryptophans located at strategic positions; its role has now been studied using different mutants. Results show that W43 and W115 play a determinant role in maintaining the high thermostability of the protein, while W146 provides specific interactions for protomer-protomer assembly...
November 22, 2016: Biochemistry
https://www.readbyqxmd.com/read/27916864/marine-organisms-with-anti-diabetes-properties
#10
REVIEW
Chiara Lauritano, Adrianna Ianora
Diabetes is a chronic degenerative metabolic disease with high morbidity and mortality rates caused by its complications. In recent years, there has been a growing interest in looking for new bioactive compounds to treat this disease, including metabolites of marine origin. Several aquatic organisms have been screened to evaluate their possible anti-diabetes activities, such as bacteria, microalgae, macroalgae, seagrasses, sponges, corals, sea anemones, fish, salmon skin, a shark fusion protein as well as fish and shellfish wastes...
December 1, 2016: Marine Drugs
https://www.readbyqxmd.com/read/27896028/the-scavenger-receptor-repertoire-in-six-cnidarian-species-and-its-putative-role-in-cnidarian-dinoflagellate-symbiosis
#11
Emilie F Neubauer, Angela Z Poole, Virginia M Weis, Simon K Davy
Many cnidarians engage in a mutualism with endosymbiotic photosynthetic dinoflagellates that forms the basis of the coral reef ecosystem. Interpartner interaction and regulation includes involvement of the host innate immune system. Basal metazoans, including cnidarians have diverse and complex innate immune repertoires that are just beginning to be described. Scavenger receptors (SR) are a diverse superfamily of innate immunity genes that recognize a broad array of microbial ligands and participate in phagocytosis of invading microbes...
2016: PeerJ
https://www.readbyqxmd.com/read/27889504/responses-of-the-sea-anemone-exaiptasia-pallida-to-ocean-acidification-conditions-and-zinc-or-nickel-exposure
#12
Christina G Duckworth, Codie R Picariello, Rachel K Thomason, Krina S Patel, Gretchen K Bielmyer-Fraser
Ocean acidification, caused by increasing atmospheric carbon dioxide (CO2), is a growing concern in marine environments. Land-based sources of pollution, such as metals, have also been a noted problem; however, little research has addressed the combined exposure of both pollutants to coral reef organisms. In this study we examined tissue metal accumulation and physiological effects (activity of anti-oxidant enzymes, catalase and glutathione reductase) in the sea anemone, Exaiptasia pallida after exposure to increased CO2, as well as zinc (Zn) or nickel (Ni)...
January 2017: Aquatic Toxicology
https://www.readbyqxmd.com/read/27882698/the-cellular-and-molecular-basis-of-cnidarian-neurogenesis
#13
REVIEW
Fabian Rentzsch, Michael Layden, Michaël Manuel
Neurogenesis initiates during early development and it continues through later developmental stages and in adult animals to enable expansion, remodeling, and homeostasis of the nervous system. The generation of nerve cells has been analyzed in detail in few bilaterian model organisms, leaving open many questions about the evolution of this process. As the sister group to bilaterians, cnidarians occupy an informative phylogenetic position to address the early evolution of cellular and molecular aspects of neurogenesis and to understand common principles of neural development...
January 2017: Wiley Interdisciplinary Reviews. Developmental Biology
https://www.readbyqxmd.com/read/27880960/antifouling-activity-towards-mussel-by-small-molecule-compounds-from-a-strain-of-vibrio-alginolyticus-bacterium-associated-with-sea-anemone-haliplanella-sp
#14
Xiang Wang, Yanqiu Huang, Yanqing Sheng, Pei Su, Yan Qiu, Caihuan Ke, Danqing Feng
Mussels are major fouling organisms causing serious technical and economic problems. In this study, antifouling activity towards mussel was found in three compounds isolated from a marine bacterium associated with the sea anemone Haliplanella sp.. This bacterial strain, called PE2 was identified as Vibrio alginolyticus using morphology, biochemical tests and phylogenetic analysis based on sequences of 16S rRNA and four housekeeping genes (rpoD, gyrB, rctB and toxR). Three small-molecule compounds (indole, 3-formylindole and cyclo (Pro-Leu)) were purified from the ethyl acetate extract of V...
November 23, 2016: Journal of Microbiology and Biotechnology
https://www.readbyqxmd.com/read/27864775/assessing-mercury-contamination-in-a-tropical-coastal-system-using-the-mussel-perna-perna-and-the-sea-anemone-bunodosoma-caissarum
#15
Nafisa Rizzini Ansari, Marcos Antônio Fernandez, José Lailson Brito, Lara Gama Vidal, Erika Silva de Andrade Costa, Olaf Malm
Total mercury concentrations in the mussel Perna perna and the sea anemone Bunodosoma caissarum were determined to assess Hg contamination in Guanabara Bay, Rio de Janeiro, Brazil, and an adjacent sea area. Concentrations in the tissues of these species were compared. Average total mercury concentrations ranged from 3.54 to 21.01 μg kg(-1) (wet wt.) in P. perna and from 4.51 to 23.19 μg kg(-1) (wet wt.) for B. caissarum. Concentrations varied according to the sampling stations. Distribution of concentrations for both species was similar along the sampling stations, and a significant correlation was observed...
December 2016: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/27859808/diet-assessment-of-the-atlantic-sea-nettle-chrysaora-quinquecirrha-in-barnegat-bay-new-jersey-using-next-generation-sequencing
#16
Robert W Meredith, John J Gaynor, Paul A X Bologna
Next-generation sequencing (NGS) methodologies have proven useful in deciphering the food items of generalist predators, but have yet to be applied to gelatinous animal gut and tentacle content. NGS can potentially supplement traditional methods of visual identification. Chrysaora quinquecirrha (Atlantic sea nettle) has progressively become more abundant in Mid-Atlantic United States' estuaries including Barnegat Bay (New Jersey), potentially having detrimental effects on both marine organisms and human enterprises...
December 2016: Molecular Ecology
https://www.readbyqxmd.com/read/27853593/sea-anemones-modify-their-hiding-time-based-on-their-commensal-damselfish
#17
Alexandra N Lim, Justin A De La Guerra, Daniel T Blumstein
Animals often retreat to refugia when alarmed and the time they spend hiding reflects an economic decision that trades off reducing predation risk with other beneficial activities. Typically, refugia such as burrows are static, but some refugia are dynamic. For species with defensive mutualisms, hiding might be contingent on their mutualist's behaviour. We disturbed and quantified hiding time in magnificent sea anemones, Heteractis magnifica, and their associated domino damselfish, Dascyllus trimaculatus. We found that sea anemone hiding behaviour was dependent on the number and behaviour of their commensal fish: anemones emerged sooner when they had more associated fish and faster returning fish...
August 2016: Royal Society Open Science
https://www.readbyqxmd.com/read/27833038/characterization-of-glutathione-peroxidase-diversity-in-the-symbiotic-sea-anemone-anemonia-viridis
#18
Alexis Pey, Thamilla Zamoum, Richard Christen, Pierre-Laurent Merle, Paola Furla
Cnidarians living in symbiosis with photosynthetic dinoflagellates (commonly named zooxanthellae) are exposed to high concentrations of reactive oxygen species (ROS) upon illumination. To quench ROS production, both the cnidarian host and zooxanthellae express a full suite of antioxidant enzymes. Studying antioxidative balance is therefore crucial to understanding how symbiotic cnidarians cope with ROS production. We characterized glutathione peroxidases (GPx) in the symbiotic cnidarian Anemonia viridis by analysis of their isoform diversity, their activity distribution in the three cellular compartments (ectoderm, endoderm and zooxanthellae) and their involvement in the response to thermal stress...
January 2017: Biochimie
https://www.readbyqxmd.com/read/27826319/in-the-picture-disulfide-poor-conopeptides-a-class-of-pharmacologically-interesting-compounds
#19
REVIEW
Eline K M Lebbe, Jan Tytgat
During evolution, nature has embraced different strategies for species to survive. One strategy, applied by predators as diverse as snakes, scorpions, sea anemones and cone snails, is using venom to immobilize or kill a prey. This venom offers a unique and extensive source of chemical diversity as it is driven by the evolutionary pressure to improve prey capture and/or to protect their species. Cone snail venom is an example of the remarkable diversity in pharmacologically active small peptides that venoms can consist of...
2016: Journal of Venomous Animals and Toxins Including Tropical Diseases
https://www.readbyqxmd.com/read/27822758/effect-of-polypeptides-from-sea-anemone-heteractis-crispa-on-the-rodent-blood-pressure-heart-rate-and-hemostasis
#20
L A Skobtsova, I A Dyachenko, Ya A Andreev, Yu A Logashina, A N Murashev, E V Grishin
АРНС1-3 peptides, modulators of TRPV1 receptors, have been administered to SD rats to study their influence on the animal hemostatic system, heart rate, and blood pressure. None of АЗРС1-3 polypeptides have any effect on the hemostatic system. Both АРНС1 and АРНС2 polypeptides increased significantly the heart rate, but they did not affect blood pressure, which was probably caused by an ability of these polypeptides to modify animal thermoregulation.
September 2016: Doklady Biological Sciences: Proceedings of the Academy of Sciences of the USSR, Biological Sciences Sections
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