Evolution of myosin filament arrangements in vertebrate skeletal muscle.
Identifieur interne : 001924 ( Main/Exploration ); précédent : 001923; suivant : 001925Evolution of myosin filament arrangements in vertebrate skeletal muscle.
Auteurs : P K Luther [Royaume-Uni] ; J M Squire ; P L ForeySource :
- Journal of morphology [ 0362-2525 ] ; 1996.
English descriptors
- KwdEn :
- MESH :
- chemical , ultrastructure : Myosins.
- anatomy & histology : Vertebrates.
- ultrastructure : Muscle, Skeletal.
- Animals, Biological Evolution, Microscopy, Electron.
Abstract
A survey of skeletal muscles throughout craniates shows basic kinds of myosin filament arrangement, simple-lattice and superlattice, within the A-band of each sarcomere. Distribution of simple- and superlattice arrangements across a phylogeny of craniates suggests that the superlattice arrangement is primitive and that Amia and teleosts are derived in showing simple-lattice arrangements. Two taxa examined (Scyliorhinus and Acipenser) show both lattice types within the same organism implying that there is not a simple evolutionary transformation of one to the other fiber arrangement. We discuss the possible functional significance of the different lattice types. We believe that the crossbridges may have greater competition for actin binding sites in simple-lattice muscles compared to the superlattice types.
DOI: 10.1002/(SICI)1097-4687(199609)229:3<325::AID-JMOR7>3.0.CO;2-X
PubMed: 8765810
Affiliations:
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Le document en format XML
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Distribution of simple- and superlattice arrangements across a phylogeny of craniates suggests that the superlattice arrangement is primitive and that Amia and teleosts are derived in showing simple-lattice arrangements. Two taxa examined (Scyliorhinus and Acipenser) show both lattice types within the same organism implying that there is not a simple evolutionary transformation of one to the other fiber arrangement. We discuss the possible functional significance of the different lattice types. We believe that the crossbridges may have greater competition for actin binding sites in simple-lattice muscles compared to the superlattice types.</div></front></TEI><affiliations><list><country><li>Royaume-Uni</li></country><region><li>Angleterre</li><li>Grand Londres</li></region><settlement><li>Londres</li></settlement></list><tree><noCountry><name sortKey="Forey, P L" sort="Forey, P L" uniqKey="Forey P" first="P L" last="Forey">P L Forey</name><name sortKey="Squire, J M" sort="Squire, J M" uniqKey="Squire J" first="J M" last="Squire">J M Squire</name></noCountry><country name="Royaume-Uni"><region name="Angleterre"><name sortKey="Luther, P K" sort="Luther, P K" uniqKey="Luther P" first="P K" last="Luther">P K Luther</name></region></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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