Immunocytochemically determined regulatory proteins, troponin, calponin and caldesmon, may occur together in the musculature of a Gordian worm (Ecdysozoa, Cycloneuralia, Nematomorpha)

Immunocytochemically determined regulatory proteins, troponin, calponin and caldesmon, may occur... Based on an electron microscopic immunocytochemical study of the body wall musculature in a Gordian worm, the three regulatory muscle proteins troponin, calponin and caldesmon appear to be present. Given that no caldesmon homolog has been identified in the genome of invertebrates to date, the result seemed surprising. Moreover, troponin and calponin/caldesmon should exclude each other. However, in view of the fact that troponin has recently also been found in non-striated invertebrate muscle and the smooth muscle proteins calponin and closely related proteins can occur in invertebrate oblique muscle types, it seems possible that in the body wall of Gordian worms a muscle type occurs that combines the features of smooth and striated muscle. Similarities to the Caenorhabditis elegans muscle underscore the phylogenetic relationship between the ecdysozoan phyla Nematoda and Nematomorpha. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Zoomorphology Springer Journals

Immunocytochemically determined regulatory proteins, troponin, calponin and caldesmon, may occur together in the musculature of a Gordian worm (Ecdysozoa, Cycloneuralia, Nematomorpha)

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Publisher
Springer Berlin Heidelberg
Copyright
Copyright © 2017 by Springer-Verlag GmbH Germany
Subject
Life Sciences; Animal Anatomy / Morphology / Histology; Developmental Biology; Evolutionary Biology; Animal Systematics/Taxonomy/Biogeography
ISSN
0720-213X
eISSN
1432-234X
D.O.I.
10.1007/s00435-017-0375-6
Publisher site
See Article on Publisher Site

Abstract

Based on an electron microscopic immunocytochemical study of the body wall musculature in a Gordian worm, the three regulatory muscle proteins troponin, calponin and caldesmon appear to be present. Given that no caldesmon homolog has been identified in the genome of invertebrates to date, the result seemed surprising. Moreover, troponin and calponin/caldesmon should exclude each other. However, in view of the fact that troponin has recently also been found in non-striated invertebrate muscle and the smooth muscle proteins calponin and closely related proteins can occur in invertebrate oblique muscle types, it seems possible that in the body wall of Gordian worms a muscle type occurs that combines the features of smooth and striated muscle. Similarities to the Caenorhabditis elegans muscle underscore the phylogenetic relationship between the ecdysozoan phyla Nematoda and Nematomorpha.

Journal

ZoomorphologySpringer Journals

Published: Aug 19, 2017

References

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