Identification of Endosymbionts in Oligobrachia mashikoi (Siboglinidae, Annelida)
نویسندگان
چکیده
منابع مشابه
Direct evidence that extracellular giant hemoglobin is produced in chloragogen tissues in a beard worm, Oligobrachia mashikoi (Frenulata, Siboglinidae, Annelida).
In Oligobrachia mashikoi, a mouthless and gutless polychaete known as a beard worm, sites of production of extra-cellular giant hemoglobin were examined with whole-mount in-situ hybridization and semi-quantitative RT-PCR. An RNA probe was prepared from mRNA of the A2-globin subunit. Clear signals were obtained from a peritoneal membrane covering the trophosome in the posterior body in all seven...
متن کاملSubtype variation among bacterial endosymbionts of tubeworms (Annelida: Siboglinidae) from the Gulf of California.
Symbiosis involving chemoautotrophic bacteria allows vestimentiferan tubeworms to thrive in sulfidic marine environments. This study examined genetic variation among endosymbionts associated with three vestimentiferan species from the Gulf of California. Small subunit (16S) rRNA sequences identified two evolutionary lineages of -Proteobacteria in these worms. Phylotype-II bacteria associated wi...
متن کاملExternal morphology of the posterior end, the "opisthosoma", of the beard worm Oligobrachia mashikoi (Pogonophora).
The entire length of the beard worm, Oligobrachia mashikoi (Pogonophora), including the posterior end, the "opisthosoma" was collected successfully. This species is exclusive to Tsukumo Bay in Ishikawa Prefecture, Japan. Although the portion preceding the opisthosoma was similar to a fine filament, it abruptly assumed a shape similar to a shovel and appeared to be composed of many segmental str...
متن کاملStructure of an extracellular giant hemoglobin of the gutless beard worm Oligobrachia mashikoi.
Mouthless and gutless marine animals, pogonophorans and vestimentiferans, obtain their nutrition solely from their symbiotic chemoautotrophic sulfur-oxidizing bacteria. These animals have sulfide-binding 400-kDa and/or 3,500-kDa Hb, which transports oxygen and sulfide simultaneously. The symbiotic bacteria are supplied with sulfide by Hb of the host animal and use it to provide carbon compounds...
متن کاملPurification, characterization and sequence analyses of the extracellular giant hemoglobin from Oligobrachia mashikoi.
We purified an extracellular hemoglobin with the molecular mass of ca. 440 kDa from the whole homogenates of Oligobrachia mashikoi (phylum Pogonophora) by a one-step gel-filtration. The preparation was pure to be crystallized. The P50 values of the hemoglobin and the fresh blood prepared from O. mashikoi were about 0.82 Torr and 0.9 Torr, respectively, which were much lower than the P50 value o...
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ژورنال
عنوان ژورنال: Microbes and Environments
سال: 2007
ISSN: 1342-6311,1347-4405
DOI: 10.1264/jsme2.22.136