A superfamily of various freshwater CRUSTACEA, in the infraorder Astacidea, comprising the crayfish. Common genera include Astacus and Procambarus. Crayfish resemble lobsters, but are usually much smaller.

A cell-surface superoxide dismutase is a binding protein for peroxinectin, a cell-adhesive peroxidase in crayfish. (1/713)

Peroxinectin, a cell-adhesive peroxidase (homologous to human myeloperoxidase), from the crayfish Pacifastacus leniusculus, was shown by immuno-fluorescence to bind to the surface of crayfish blood cells (haemocytes). In order to identify a cell surface receptor for peroxinectin, labelled peroxinectin was incubated with a blot of haemocyte membrane proteins. It was found to specifically bind two bands of 230 and 90 kDa; this binding was decreased in the presence of unlabelled peroxinectin. Purified 230/90 kDa complex also bound peroxinectin in the same assay. In addition, the 230 kDa band binds the crayfish beta-1,3-glucan-binding protein. The 230 kDa band could be reduced to 90 kDa, thus showing that the 230 kDa is a multimer of 90 kDa units. The peroxinectin-binding protein was cloned from a haemocyte cDNA library, using immuno-screening or polymerase chain reaction based on partial amino acid sequence of the purified protein. It has a signal sequence, a domain homologous to CuZn-containing superoxide dismutases, and a basic, proline-rich, C-terminal tail, but no membrane-spanning segment. In accordance, the 90 and 230 kDa bands had superoxide dismutase activity. Immuno-fluorescence of non-permeabilized haemocytes with affinity-purified antibodies confirmed that the crayfish CuZn-superoxide dismutase is localized at the cell surface; it could be released from the membrane with high salt. It was thus concluded that the peroxinectin-binding protein is an extracellular SOD (EC-SOD) and a peripheral membrane protein, presumably kept at the cell surface via ionic interaction with its C-terminal region. This interaction with a peroxidase seems to be a novel function for an SOD. The binding of the cell surface SOD to the cell-adhesive/opsonic peroxinectin may mediate, or regulate, cell adhesion and phagocytosis; it may also be important for efficient localized production of microbicidal substances.  (+info)

Simultaneous measurement of evoked release and [Ca2+]i in a crayfish release bouton reveals high affinity of release to Ca2+. (2/713)

The opener neuromuscular junction of crayfish was used to determine the affinity of the putative Ca2+ receptor(s) responsible for evoked release. Evoked, asynchronous release, and steady-state intracellular Ca2+ concentration, [Ca2+]ss, were measured concomitantly in single release boutons. It was found that, as expected, asynchronous release is highly correlated with [Ca2+]ss. Surprisingly, evoked release was also found to be highly correlated with [Ca2+]ss. The quantal content (m) and the rate of asynchronous release (S) showed sigmoidal dependence on [Ca2+]ss. The slope log m/log [Ca2+]ss varied between 1.6 and 3.3; the higher slope observed at the lower [Ca2+]o. The slope log S/log [Ca2+]ss varied between 3 and 4 and was independent of [Ca2+]o. These results are consistent with the assumption that evoked release is controlled by the sum of [Ca2+]ss and the local elevation of Ca2+ concentration near the release sites resulting from Ca2+ influx through voltage-gated Ca2+ channels (Y). On the basis of the above, we were able to estimate Y. We found Y to be significantly <10 microM even for [Ca2+]o = 13.5 mM. The dissociation constant (Kd) of the Ca2+ receptor(s) associated with evoked release was calculated to be in the range of 4-5 microM. This value of Kd is similar to that found previously for asynchronous release.  (+info)

The crayfish plasma clotting protein: a vitellogenin-related protein responsible for clot formation in crustacean blood. (3/713)

Coagulation in crayfish blood is based on the transglutaminase-mediated crosslinking of a specific plasma clotting protein. Here we report the cloning of the subunit of this clotting protein from a crayfish hepatopancreas cDNA library. The ORF encodes a protein of 1,721 amino acids, including a signal peptide of 15 amino acids. Sequence analysis reveals that the clotting protein is homologous to vitellogenins, which are proteins found in vitellogenic females of egg-laying animals. The clotting protein and vitellogenins are all lipoproteins and share a limited sequence similarity to certain other lipoproteins (e.g., mammalian apolipoprotein B and microsomal triglyceride transfer protein) and contain a stretch with similarity to the D domain of mammalian von Willebrand factor. The crayfish clotting protein is present in both sexes, unlike the female-specific vitellogenins. Electron microscopy was used to visualize individual clotting protein molecules and to study the transglutaminase-mediated clotting reaction. In the presence of an endogenous transglutaminase, the purified clotting protein molecules rapidly assemble into long, flexible chains that occasionally branch.  (+info)

Cryptocyanin, a crustacean molting protein: evolutionary link with arthropod hemocyanins and insect hexamerins. (4/713)

Cryptocyanin, a copper-free hexameric protein in crab (Cancer magister) hemolymph, has been characterized and the amino acid sequence has been deduced from its cDNA. It is markedly similar in sequence, size, and structure to hemocyanin, the copper-containing oxygen-transport protein found in many arthropods. Cryptocyanin does not bind oxygen, however, and lacks three of the six highly conserved copper-binding histidine residues of hemocyanin. Cryptocyanin has no phenoloxidase activity, although a phenoloxidase is present in the hemolymph. The concentration of cryptocyanin in the hemolymph is closely coordinated with the molt cycle and reaches levels higher than hemocyanin during premolt. Cryptocyanin resembles insect hexamerins in the lack of copper, molt cycle patterns of biosynthesis, and potential contributions to the new exoskeleton. Phylogenetic analysis of sequence similarities between cryptocyanin and other members of the hemocyanin gene family shows that cryptocyanin is closely associated with crustacean hemocyanins and suggests that cryptocyanin arose as a result of a hemocyanin gene duplication. The presence of both hemocyanin and cryptocyanin in one animal provides an example of how insect hexamerins might have evolved from hemocyanin. Our results suggest that multiple members of the hemocyanin gene family-hemocyanin, cryptocyanin, phenoloxidase, and hexamerins-may participate in two vital functions of molting animals, oxygen binding and molting. Cryptocyanin may provide important molecular data to further investigate evolutionary relationships among all molting animals.  (+info)

Tonic activation of presynaptic GABAB receptors in the opener neuromuscular junction of crayfish. (5/713)

Release of excitatory transmitter from boutons on crayfish nerve terminals was inhibited by (R,S)-baclofen, an agonist at GABAB receptors. Baclofen had no postsynaptic actions as it reduced quantal content without affecting quantal amplitude. The effect of baclofen increased with concentration producing 18% inhibition at 10 microM; EC50, 50% inhibition at 30 microM; maximal inhibition, 85% at 100 microM and higher. There was no desensitization, even with 200 or 320 microM baclofen. Phaclofen, an antagonist at GABAB receptors, competitively antagonized the inhibitory action of baclofen (KD = 50 microM, equivalent to a pA2 = 4.3 +/- 0.1). Phaclofen on its own at concentrations below 200 microM had no effect on release, whereas at 200 microM phaclofen itself increased the control level of release by 60%, as did 2-hydroxy-saclofen (200 microM), another antagonist at GABAB receptors. This increase was evidently due to antagonism of a persistent level of GABA in the synaptic cleft, since the effect was abolished by destruction of the presynaptic inhibitory fiber, using intra-axonal pronase. We conclude that presynaptic GABAB receptors, with a pharmacological profile similar to that of mammalian GABAB receptors, are involved in the control of transmitter release at the crayfish neuromuscular junction.  (+info)

Coherent oscillations in membrane potential synchronize impulse bursts in central olfactory neurons of the crayfish. (6/713)

Lateral protocerebral interneurons (LPIs) in the central olfactory pathway of the freshwater crayfish Procambarus clarkii reside within the lateral protocerebrum and receive direct input from projection neurons of the olfactory midbrain. The LPIs exhibit periodic (0.5 Hz) changes in membrane potential that are imposed on them synaptically. Acute surgical experiments indicate that the synaptic activity originates from a group of oscillatory neurons lying within the lateral protocerebrum. Simultaneous intracellular recordings from many LPI pairs indicate that this periodic synaptic input is synchronous and coherent among the population of approximately 200 LPIs on each side of the brain. In many LPIs, specific odors applied to antennules in isolated head preparations generate long-lasting excitatory postsynaptic potentials and impulse bursts. The impulse bursts are generated only near the peaks of the ongoing depolarizations, approximately 1 s after stimulus application, and so the periodic baseline activity is instrumental in timing burst generation. Simultaneous recordings from pairs of LPIs show that, when impulse bursts occur in both cells after an odorant stimulus, they are synchronized by the common periodic depolarizations. We conclude that the common, periodic activity in LPIs can synchronize impulse bursts in subsets of these neurons, possibly generating powerful long-lasting postsynaptic effects in downstream target neurons.  (+info)

Cooperative Ca2+ removal from presynaptic terminals of the spiny lobster neuromuscular junction. (7/713)

Stimulation-induced changes in presynaptic free calcium concentration ([Ca2+]i) were examined by fluorescent imaging at the spiny lobster excitor motor nerve terminals. The Ca2+ removal process in the terminal was analyzed based on a single compartment model, under the assumption that the Ca2+ removal rate from the terminal cytoplasm is proportional to nth power of [Ca2+]i. During 100 nerve stimuli at 10-100 Hz, [Ca2+]i reached a plateau that increased in a less-than-linear way with stimulation frequency, and the power index, n, was about 2. In the decay time course after stimulation, n changed with the number of stimuli from about 1.4 after 10 stimuli to about 2 after 100 stimuli. With the change of n from 1.4 to 2, the rate became larger at high [Ca2+]i (>1.5 microM), but was smaller at low [Ca2+]i (<1 microM). These results suggest that a cooperative Ca2+ removal mechanism of n = 2, such as mitochondria, may play an important role in the terminal. This view is supported by the gradual increase in the [Ca2+]i plateau during long-term stimulation at 20-50 Hz for 60 s and by the existence of a very slow [Ca2+]i recovery process after this stimulation, both of which may be due to accumulation of Ca2+ in the organelle.  (+info)

Infection status of Paragonimus westermani metacercariae in crayfish (Cambaroides similis) collected from Bogildo (Islet), Wando-gun, Chollanam-do, Korea. (8/713)

During the period from October 1996 to November 1998, the infection status of Paragonimus westermani metacercariae in freshwater crayfish (Cambaroides similis) collected from Bogildo (islet). Wando-gun, Chollanam-do, which is known for an endemic area of P. westermani in Korea, were examined. The average infection rate of Paragonimus metacercariae in crayfish was 88.6%, and mean number of metacercariae per infected crayfish was 30.2. This metacercarial density was the highest in the group of weight in 7.1-9.0 g. These results suggest that the natural life cycle of P. westermani is still well-preserved in Bogildo.  (+info)

... is superfamily of freshwater crayfish that live in the Northern Hemisphere. The other superfamily of crayfish, ... Astacoidea consists of three families: Astacidae (from Europe and western North America), Cambaridae (from eastern North ...
Decapoda: Astacoidea: Cambaridae)". Journal of Crustacean Biology. 38 (5): 600-613. doi:10.1093/jcbiol/ruy057. v t e (Articles ...
Decapoda: Astacoidea: Cambaridae)". Journal of Crustacean Biology. 38 (5): 600-613. doi:10.1093/jcbiol/ruy057. Media related to ...
Of the other three Northern Hemisphere families (grouped in the superfamily Astacoidea), the four genera of the family ... Taxonomically, they are members of the superfamilies Astacoidea and Parastacoidea. They breathe through feather-like gills. ... 1994). "A dictionary of non-scientific names of freshwater crayfishes (Astacoidea and Parastacoidea), including other words and ...
... belongs to the superfamily Astacoidea, which contains all crayfish in the Northern Hemisphere. Astacoidea is the ...
... one of the three families of Northern Hemisphere freshwater crayfish within the superfamily Astacoidea. The internal phylogeny ...
... one of the three families of Northern Hemisphere freshwater crayfish within the superfamily Astacoidea. The internal phylogeny ...
Astacoidea: Cambaridae) in western Pennsylvania: a century of change or stasis? Journal of Crustacean Biology 37(5):1-9. Foltz ...
"The phylogenetic position of the East Asian freshwater crayfish Cambaroides within the Northern Hemisphere Astacoidea ( ...
therefore relied on the form of the telson, which has a diaeresis (division into two halves) in Astacoidea, but none in ... The chief distinction between the Northern Hemisphere superfamily Astacoidea and the Southern Hemisphere superfamily ...
2019) did not classify "M." chaoyangensis within Astacoidea, so for now it is left as a basal crayfish, likely due to the age ...
... crayfish and lobsters Superfamily crayfish Astacoidea Latreille, 1802 Family Cambaridae Hobbs, 1942 Sub-family Cambarinae Hobbs ...
... astacoidea MeSH B01.500.131.365.190.110 - brachyura MeSH B01.500.131.365.190.150 - crangonidae MeSH B01.500.131.365.190.550 - ...
The infraorder Astacidea comprises five extant superfamilies, two of crayfish (Astacoidea and Parastacoidea), one of true ... Astacoidea Astacidae Cambaridae Cambaroididae Cricoidoscelosidae † Parastacoidea Parastacidae Gary Poore (2004). "Astacidea - ...
1852 Astacoidea Latreille, 1802 Parastacoidea Huxley, 1879 Infraorder Glypheidea Winckler, 1882 Glypheoidea Winckler, 1882 ...
... freshwater crustaceans belonging to the superfamilies Astacoidea and Parastacoidea This disambiguation page lists articles ...
This page is a Tree of Life Branch Page.. Each ToL branch page provides a synopsis of the characteristics of a group of organisms representing a branch of the Tree of Life. The major distinction between a branch and a leaf of the Tree of Life is that each branch can be further subdivided into descendent branches, that is, subgroups representing distinct genetic lineages.. For a more detailed explanation of the different ToL page types, have a look at the Structure of the Tree of Life page.. close box ...
Paragonimiasis is a zoonotic, food-borne trematode infection that affects around 23 million people in Asia, Africa and the Americas. North American paragonimiasis, caused by Paragonimus kellicotti, is a common infection of crustacean-feeding mammals in parts of the USA and Canada. Although infection …
MeSH Terms: Animals; Astacoidea/metabolism*; Environmental Monitoring/methods*; Oregon; Polycyclic Aromatic Hydrocarbons/ ...
Astacoidea Superfamily. :. Cambaridae Family. :. Lacunicambarus Genus. Map Views: World , NATL , SATL , NPAC , SPAC , Indian ...
Astacoidea Preferred Term Term UI T467192. Date10/22/2001. LexicalTag NON. ThesaurusID NLM (2003). ... Astacoidea Preferred Concept UI. M0005291. Registry Number. txid6724. Related Numbers. txid6714. txid6726. Scope Note. A ... Astacoidea. Tree Number(s). B01.050.500.131.365.190.070. Unique ID. D003400. RDF Unique Identifier. http://id.nlm.nih.gov/mesh/ ...
Pedraza Lara, Carlos (2015) Patrones de diversificación y procesos evolutivos en cangrejos de río (Crustacea, Astacoidea). [ ...
Astacoidea B01.050.500.131.365.190.110 Brachyura B01.050.500.131.365.190.150 Crangonidae B01.050.500.131.365.190.550 ...
Dinstein, I., Arazi, A., Golan, H. M., Koller, J., Elliott, E., Gozes, I., Shulman, C., Shifman, S., Raz, R., Davidovitch, N., Gev, T., Aran, A., Stolar, O., Ben-Itzchak, E., Snir, I. M., Israel-Yaacov, S., Bauminger-Zviely, N., Bonneh, Y. S., Gal, E., Shamay-Tsoory, S., & 25 othersZait, A. Z., Hadad, B. S., Gross, R., Faroy, M., Bachmat, E., Eran, A., Uzefovsky, F., Flusser, H., Michaelovski, A., Levine, S. Z., Kodesh, A., Gothelf, D., Marom, D., Feldman, H. B., Yosef, D. B., Bloch, A. M., Sadaka, Y., Schtaierman, C., Davidovitch, M., Begin, M., Gabis, L. V., Zachor, D., Menashe, I., Golan, O. & Meiri, G., 1 Sep 2020, In: Journal of Molecular Neuroscience. 70, 9, p. 1303-1312 10 p.. Research output: Contribution to journal › Editorial ...
Astacoidea - Preferred Concept UI. M0005291. Scope note. A superfamily of various freshwater CRUSTACEA, in the infraorder ...
Astacoidea Preferred Term Term UI T467192. Date10/22/2001. LexicalTag NON. ThesaurusID NLM (2003). ... Astacoidea Preferred Concept UI. M0005291. Registry Number. txid6724. Related Numbers. txid6714. txid6726. Scope Note. A ... Astacoidea. Tree Number(s). B01.050.500.131.365.190.070. Unique ID. D003400. RDF Unique Identifier. http://id.nlm.nih.gov/mesh/ ...
Astacoidea (9) * Penaeidae (9) * Phaeophyta (9) * Chlorophyta (9) * ARN Largo no Codificante (9) ...
Astacoidea (16) * Lectinas Tipo C (15) * Vibrio (14) * Peptídeos Catiônicos Antimicrobianos (13) ...
Worldwide source of medical classification resources ...
Astacidea is an infraorder of . There are 2 species of Astacidea, in 2 genera and 2 families.. ...
Astacoidea; Cambaridae; Cambarinae; Procambarus. Entrez records ...
Astacoidea: Astacidae) in Croatia. J Crustacean Biol 37: 7-15. [Google Scholar] ...
Replaced for 2003 by Astacoidea) Crossing Over (Genetics) G5.148.301 G5.760.210 G5.825.210 Crotonates D2.241.81.436.275.240.240 ...
Astacoidea:drug effects, Environmental Exposure:adverse effects, Herbicides:toxicity, Toxicity Tests, Subchronic, Triazines: ...
... they are members of the superfamilies Astacoidea and Parastacoidea. They breathe through feather-like gills and are found in ...
A contribution on the morphometrics of the thick-clawed crayfish Pontastacus pachypus (Rathke, 1837) (Decapoda, Astacoidea, ...
If your institution subscribes to this resource, and you dont have a MyAccess Profile, please contact your librarys reference desk for information on how to gain access to this resource from off-campus. Learn More ...
Astacoidea Astatine Astemizole Aster Plant Asteraceae Asterias Asterina Asthenia Asthenopia Asthenozoospermia Asthma Asthma, ...
We report a novel phenomenon produced by focused ultrasound (US) that may be important for understanding its effects on cell membranes. When a US burst (2.1 MHz, 1-mm focal diameter, 0.1-1 MPa) was focused on a motor axon of the crayfish neuromuscular junction, it consistently produced a fast hyperp …
Synaptic facilitation (SF) is a ubiquitous form of short-term plasticity, regulating synaptic dynamics on fast timescales. Although SF is known to depend on the presynaptic accumulation of Ca(2+), its precise mechanism is still under debate. Recently it has been shown that at certain central synapse …
Astacoidea. CRABS. Brachyura. DRACUNCULUS. Dracunculus Nematode. LOBSTERS. Nephropidae. SETARIA. Setaria Nematode. BARNACLES. ...
au:Shi, Xiu-Zhen AND (instance:perinatal OR (instance:regional AND (db:MEDLINE OR db:LILACS OR db:WHOLIS OR db:PAHO OR db:IBECS OR db:MedCarib OR db:REPDISCA OR db:CidSaude OR db:BDENF OR db:HISA OR db:DESASTRES OR db:COCHRANE-AGENCIAS OR db:COCHRANE-BANDOLIER OR db:COCHRANE-CENTRAL OR db:COCHRANE-CMR OR db:COCHRANE-DARE_ABSTRACTS OR db:COCHRANE-DARECLIB OR db:COCHRANE-EED_ABSTRACTS OR db:COCHRANE-EED_BIBLIO OR db:COCHRANE-EVIDARGENT OR db:COCHRANE-GESTION OR db:COCHRANE-HTA OR db:COCHRANE-KOVACS OR db:COCHRANE-METH_PROTOCOLS OR db:COCHRANE-METH_REVIEWS OR db:COCHRANE-PROTOCOLS OR db:COCHRANE-REGISTRO OR db:COCHRANE-REVIEWS-PLUS OR db:COCHRANE-REVIEWS ...

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