The female genital apparatus of decapod cephalopods contains a symbiotic accessory nidamental gland (ANG) that harbors bacterial symbionts. Although the ANG bacterial consortium is now well described, the impact of symbiosis on Sepia officinalis innate immunity pathways remains unknown. In silico analysis of the de novo transcriptome of ANG highlighted for the first time the existence of the NF-κB pathway in S. officinalis. Several signaling components were identified, i.e. five Toll-like receptors, eight signaling cascade features, and the immune response target gene iNOS, previously described as being involved in the initiation of bacterial symbiosis in a cephalopod gland. This work provides a first key for studying bacterial symbiosis and its impact on innate immunity in S. officinalis ANG.
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http://dx.doi.org/10.1016/j.dci.2015.06.016 | DOI Listing |
Philos Trans R Soc Lond B Biol Sci
November 2024
Department of Plant Sciences, University of Cambridge, Cambridge CB2 3EA, UK.
Vitamin B, also known as cobalamin, is an essential organic cofactor for methionine synthase (METH), and is only synthesized by a subset of bacteria. Plants and fungi have an alternative methionine synthase (METE) that does not need B and are typically considered not to utilize it. Some algae facultatively utilize B because they encode both METE and METH, while other algae are dependent on B as they encode METH only.
View Article and Find Full Text PDFZoolog Sci
August 2024
Department of Biological Sciences, Graduate School of Science, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397, Japan.
The Coleoptera Cerambycidae (longicorn beetles) use wood under different states (living healthy, freshly snapped, completely rot, etc.) in a species-specific manner for their larval diet. Larvae of some Cerambycidae groups have mycetomes, accessory organs associated with the midgut that harbor fungal symbiont cells.
View Article and Find Full Text PDFiScience
May 2024
Bioproducion Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Japan.
Cassidine leaf beetles are associated with genome-reduced symbiotic bacteria involved in pectin digestion. cells appear to be harbored in paired symbiotic organs located at the foregut-midgut junction either intracellularly or extracellularly, whereas the symbiont is extracellular in the ovary-accessory glands of adult females and during caplet transmission in eggs. However, using fluorescence and electron microscopy, an intracellular symbiotic configuration of was observed in species.
View Article and Find Full Text PDFSci Total Environ
June 2024
Department of Clinical Laboratory, Key Laboratory of Biological Targeting Diagnosis, Therapy and Rehabilitation of Guangdong Higher Education Institutes, The Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou 510700, Guangdong, China; KingMed School of Laboratory Medicine, Guangzhou Medical University, Guangzhou 510180, Guangdong, China. Electronic address:
Animal hosts harbor diverse assemblages of microbial symbionts that play crucial roles in the host's lifestyle. The link between microbial symbiosis and host development remains poorly understood. In particular, little is known about the adaptive evolution of gut bacteria in host-microbe symbioses.
View Article and Find Full Text PDFiScience
February 2024
Key Laboratory of Molecular Biophysics of the Ministry of Education, Hubei Key Laboratory of Bioinformatics and Molecular-imaging, Department of Bioinformatics and Systems Biology, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China.
is a genus of nitrogen-fixing bacteria, with some species producing nodules in leguminous plants. Investigations into have recently revealed its substantial genetic resources and agricultural benefits, but a comprehensive survey of its genetic diversity and functional properties is lacking. Using a panel of various strains (N = 278), this study performed a comparative genomics analysis to anticipate genes linked with symbiotic nitrogen fixation.
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