Cookies Policy
X

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies.

I accept this policy

Find out more here

ATROPHY OF CRUSTACEAN SOMATIC MUSCLE AND THE PROTEINASES THAT DO THE JOB. A REVIEW

No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
The full text of this article is not currently available.

Brill’s MyBook program is exclusively available on BrillOnline Books and Journals. Students and scholars affiliated with an institution that has purchased a Brill E-Book on the BrillOnline platform automatically have access to the MyBook option for the title(s) acquired by the Library. Brill MyBook is a print-on-demand paperback copy which is sold at a favorably uniform low price.

Access this article

+ Tax (if applicable)
Add to Favorites
You must be logged in to use this functionality

image of Journal of Crustacean Biology

ABSTRACT As much as 60% of the muscle in the propodus of both chelae of some brachyurans atrophies during proecdysis and is restored during metecdysis. We describe here the structural changes that occur during atrophy of such chelae muscles as well as atrophy of somatic muscle from a number of species of Crustacea in response to one or more of several physiological stimuli. Atrophy is not random and whole fibers are not lost; the remaining cellular structures provide a framework into which newly synthesized myofibrillar proteins are packed during metecdysis. As seen in electron micrographs as well as in gel electropherograms, more thin filament proteins (actin, troponin, and tropomyosin) are degraded when compared to those from thick filaments (chiefly myosin). We also describe the properties of cytosolic proteinases isolated from muscle of land crabs and lobsters that degrade the myofibrillar proteins. Four of the five proteinases are activated by calcium and therefore are designated CDPs (calcium dependent proteinases). In addition to the CDPs, we summarize information about the first MCP (multicatalytic proteinase) to be isolated and characterized from Crustacea. Atrophy occurs only in chelae and not in walking legs during proecdysis; atrophy is twice as extensive in the major chela as in the minor chela of fiddler crabs. Clearly, the controls of this selective atrophy are fine-tuned. Some possible mechanisms that might provide the controls that determine which muscle fibers and which of their components are targeted are also discussed.

Loading

Full text loading...

/content/journals/10.2307/1548402
Loading

Data & Media loading...

http://brill.metastore.ingenta.com/content/journals/10.2307/1548402
Loading

Article metrics loading...

/content/journals/10.2307/1548402
1990-01-01
2016-12-11

Sign-in

Can't access your account?
  • Tools

  • Add to Favorites
  • Printable version
  • Email this page
  • Subscribe to ToC alert
  • Get permissions
  • Recommend to your library

    You must fill out fields marked with: *

    Librarian details
    Your details
    Why are you recommending this title?
    Select reason:
     
    Journal of Crustacean Biology — Recommend this title to your library
  • Export citations
  • Key

  • Full access
  • Open Access
  • Partial/No accessInformation