Abstract
A cDNA encoding a full length putative sodium channel has been cloned from the sea anemoneAiptasia pallida. The deduced protein, named AiNal, has a predicted molecular weight of 205 000 Da. It shows high structural similarity to other sodium channels from both invertebrates and vertebrates, and its structure is consistent with the four domain, six transmembrane segment motif of all known voltage-gated sodium channels. In the region purported to constitute the tetrodotoxin (TTX) receptor of sodium channels, AiNal differs from the TTX-sensitive motif, suggesting that currents carried by this channel would be insensitive to TTX. The presence of a conventional sodium channel protein in anemones indicates, for the first time, that neurons in sea anemones are likely to be capable of producing fast, overshooting action, potentials.
Similar content being viewed by others
References
Anderson, P. A. V. (1985) Physiology of a bidirectional, excitatory, chemical synapse.J. Neurophysiol.,53, 821–835.
Anderson, P. A. V. (1987) Properties and pharmacology of a TTX-insensitive Na+ current in neurones of the jellyfish Cyanea capillata.J. Exp. Biol.,133, 231–248.
Anderson, P. A. V. (1990) Ionic currents in the scyphozoa. InEvolution of the First Nervous Systems, ed. Peter A. V. Anderson, pp. 267–280. New York: Plenum Press.
Anderson, P. A. V. and Schwah, W. E. (1984) An epithelial cell-free preparation of the motor nerve net of Cyanea (Coelenterata: Scyphozoa).Biol. Bull.,166, 396–408.
Anderson, P. A. V., Holman, M. A. and Greenberg, R. M. (1993) Deduced amino acid sequence of a putative sodium channel from the scyphozoan jellyfish Cyanea capillata.Proc. Natl. Acad. Sci. USA,90, 7419–7423.
Bennett, E., Urcan, M. S., Tinkle, S. S., Koszowski, A. G. and Levinson, S. R. (1997) Contribution of sialic acid to the voltage-dependence of sodium channel gating.J. Gen. Physiol.,109, 327–343.
Blair, K. L. and Anderson, P. A. V. (1993) Properties of voltage-activated ionic currents in cells from the brains of the triclad flatwormBdelloura candida.J. Exp. Biol.,185, 267–286.
Blin, N. and Stafford, D. W. (1976) A general method for isolation of high molecular weight DNA from eukaryotes.Nucl. Acids Res.,3, 2303–2308.
Brusca, R. C. and Brusca, G. J. (1990).Invertebrates Sunderland, Mass: Sinauer Assoc.
Byerly, L., and Moody, W. J. (1984) Intracellular calcium ions and calcium currents in perfused neurones of the snail,Lymnaea stagnalis, J. Physiol. (Lond.),352, 637–652.
Catterall, W. A. (1995) Structure and function of voltage-gated ion channels.Ann. Rev. Biochem.,64, 493–531.
Chandy, K. G. and Gutman, G. A. (1995) Voltage-gated potassium channel genes. In:Ligand and Voltage-Gated Ion Channels, ed. R. A. North, pp. 1–71.Handbook of Receptors and Channels. Boca Raton: CRC Press.
Cho, K., and McFarlane, I. D. (1996) The anthozoan neuropeptide Antho-RWamide I modulates Ca2+ current in sea anemone myoepithelial cells.Neurosci Letts.209, 53–56.
Conner, J. A., and Stevens, C. F. (1971) Prediction of repetitive firing behaviour from voltage clamp data on an isolated neurone soma.J. Physiol. (Lond.),213, 1–19.
Feng, G., Deák, P., Chopra, M. and Hall, L. M. (1995) Cloning and functional analysis of TipE, a novel membrane protein that enhancesDrosophila para sodium channel function.Cell,82, 1001–1011.
Frohman, M. A. (1990) RACE: Rapid amplification of cDNA ends. InPCR Protocols, ed. M. A. Innis, D. H. Gelfand, J. J. Sninsky and T. J. White, pp. 28–38. San Diego: Academic Press.
Goldin, A. L. (1995) Voltage-gated sodium channels. InLigand and Voltage-Gated Ion Channels, ed. R. A. North, pp. 73–112.Handbook of Receptors and Channels, Boca Raton: CRC Press.
Hille, B. (1968) Pharmacological modifications of the sodium channels of frog nerve.J. Gen. Physiol.,51, 199–219.
Holman, M., and Anderson, P. A. V. (1991) Voltage-activated ionic currents in myoepithelial cells from the sea anemoneCalliactis tricolor.J. Exp. Biol.,161, 333–346.
Jakubcsak, R. S., Keith, C. H. and Porter, J. W. (1988) The neuropharmacology of photoreceptive pathway in corals.Soc. Neurosci. Abstr.,18, 375.
Jeziorski, M. C., Greenberg, R. M. and Anderson, P. A. V. (1997) Cloning of a putative voltage-gated sodium channel from the turbellarian flatwormBdelloura candida.Parasitology,115, 289–96.
Jeziorski, M. C., Greenberg, R. M., Clark, K. S. and Anderson, P. A. V. (1998) Cloning and functional expression of a voltage-gated calcium channel α1 subunit from jellyfish.J. Biol. Chem.,273, 22792–22799.
Krishtal, O. A., Pidoplichko, V. I. and Shakhovalov, Y. A. (1981) Conductance of the calcium channel in the membrane of snail neurones.J. Physiol. (Lond.),310, 423–434.
Kumar, S., Tamura, K. and Nei, M. (1993) MEGA: Molecular Evolutionary Genetics Analysis, version 1.0. The Pennsylvania University, University Park, PA 16802.
Lipkind, G. M. and Fozzard, H. A. (1994) A structural model of the tetrodotoxin and saxitoxin binding site of the Na+ channel.Biophysical J.,66, 1–13.
Mackie, G. O. (1965) Conduction in the nerve-free epithelia of siphonophores.Am. Zool.,5, 439–453.
Mackie, G. O. (1976) Propagated spikes in a coelenterate glandular epithelium.J. Gen. Physiol.,68, 313–325.
Mackie, G. O. and Meech, R. W. (1985) Separate sodium and calcium spikes in the same axon.Nature,313, 791–793.
Mackie, G. O. and Passano, L. M. (1968) Epithelial conduction in hydromedusae.J. Gen. Physiol.,52, 600–621.
McFarlane, I. D. (1969) Two slow conduction systems in the sea anemoneCalliactis parasitica.J. Exp. Biol.,51, 377–385.
McFarlane, I. D. (1973) Spontaneous contractions and nerve net activity in the sea anemoneCalliactis parasitica.Mar. Behav. Physiol.,2, 97–113.
McFarlane, I. D. (1974) Excitatory and inhibitory control of inherent contractions in the sea anemoneCalliactis parasitica.J. Exp. Biol.,60, 397–422.
McFarlane, I. D. (1975) Control of mouth opening and pharynx protrusion during feeding in the sea anemoneCalliactis parasitica.J. Exp. Biol.,63, 615–626.
McFarlane, I. D., Graff, D. and Grimmelikhuijzen, C. J. P. (1987) Excitatory actions of Antho-RFamide, an anthozoan neuropeptide, on muscles and conducting systems in the sea anemoneCalliactis parasitica.J. Exp. Biol.,133, 157–168.
Meech, R. W., and Mackie, G. O. (1993a) Ionic currents in giant motor axons of the jellyfishAglantha digitale.J. Neurophysiol.,69, 884–893.
Meech, R. W., and Mackie, G. O. (1993b) Potassium channel family in giant motor axons ofAglantha digitale.J. Neurophysiol.,69, 894–901.
Patton, D. E., West, J. W., Catterall, W. A. and Goldin, A. L. (1992) Amino acid residues required for fast Na+-channel inactivation: Charge neutralizations and deletions in the III–IV linker.Proc. Natl. Acad. Sci. USA,89, 10905–10909.
Przysiezniak, J., and Spencer, A. N. (1992) Voltage-activated calcium currents in identified neurons from a hydrozoan jellyfish,Polyorchis pennicilatus.J. Neurosci.,12, 2065–2078.
Przysiezniak, J., and Spencer, A. N. (1994) Voltage-activated potassium currents in isolated motor neurons from the jellyfishPolyorchis pennicilatus.J. Neurophysiol.,72, 1010–1019.
Saitou, N. and Nei, M. (1987) The neighbour-joining method: a new method for reconstructing phylogenetic trees.Mol. Biol. Evol.,4, 406–425.
Sambrook, J., Fritsch, E. F. and Maniatis, T. (1989).Molecular Cloning: A Laboratory Manual, Cold Spring Harbor, New York: Cold Spring Harbor Laboratory Press.
Saripalli, L. D., and Westfall, J. A. (1996). Classification of nerve cells dissociated from tentacles of the sea anemoneCalliactis parasitica.Biol. Bull.,190, 111–124.
Satin, J., Kyle, J. W., Chen, M., Bell, P., Cribbs, L. L., Fozzard, H. A. and Rogart, R. B. (1992) A mutant of TTX-resistant cardiac sodium channels with TTX-sensitive properties.Science,256, 1202–1205.
Schetz, J. A., and Anderson, P. A. V. (1995) Glycosylation patterns of membrane proteins of the jellyfishCyanea capillata.Cell Tiss. Res.,279, 315–321.
Schrager, P., and Profera, C. (1973) Inhibition of the receptor for tetrodotoxin in nerve membranes by modifying carbonyl groups.Biochim. Biophys. Acta.,318, 141–146.
Schwartz, L. M., and Stuhmer, W. (1984) Voltage-dependent sodium chaanels in an invertebrate striated muscle.Science,225, 523–525.
Spafford, J. D., Grigoriev, N. and Spencer, A. N. (1996). Pharmacological properties of voltage-gated Na+ currents in motor neurones from a hydrozoan jellyfishPolyorchis pennicilatus.J. Exp. Biol.,199, 941–948.
Stea, A., Soong, T. W. and Snutch, T. P. (1995) Voltage-gated calcium channels. InLigand and Voltage-Gated Ion Channels, ed. R. A. North, pp. 113–151.Handbook of Receptors and Channels, Boca Raton: CRC Press.
Terlau, H., Heinemann, S. H., Stühmer, Pusch, M., Conti, F., Imoto, K. and Numa, S. (1991) Mapping the site of block by tetrodotoxin and saxitoxin of sodium channel II.FEBS,293 93–96.
Thompson, J. D., Higgins, D. G. and Gibson, T. J. (1994). CLUSTALW: improving the sensitivity of progressive multiple sequence alignment through sequence weighting, position-specific gap penalties and weight matrix choice.Nucl. Acids Res.,22, 4673–4680.
Warmke, J. W., Reenan, R. A. G., Wang, P., Qian, S., Arena, J. P., Wang, J., Wunderler, D., Liu, K., Kaczorowski, G. J., Van der Ploeg, L. H. T., Ganetsky, B. and Cohen, C. J. (1997) Functional expression ofDrosophila para sodium channels; modulation by the membrane protein TipE and toxin pharmacology.J. Gen. Physiol.,110, 119–133.
West, J. W., Patton, D. E., Scheuer, T., Wang, Y., Goldin, A. L. and Catterall, W. A. (1992) A cluster of hydrophobic amino acid residues required for fast Na+ channel inactivation.Proc. Natl. Acad. Sci. USA,89, 10910–10914.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
White, G.B., Pfahnl, A., Haddock, S. et al. Structure of a putative sodium channel from the sea anemoneAiptasia pallida . Invertebrate Neuroscience 3, 317–326 (1998). https://doi.org/10.1007/BF02577691
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF02577691