Linked Life Data

20385102

Source:http://linkedlifedata.com/resource/pubmed/id/20385102

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
4
pubmed:dateCreated
2010-5-17
pubmed:abstractText
Repeated molting of the cuticula is an integral part of arthropod and nematode development. Shedding of the old cuticle takes place on the surface of hypodermal cells, which are also responsible for secretion and synthesis of a new cuticle. Here, we use the model nematode Caenorhabditis elegans to show that muscle cells, laying beneath and mechanically linked to the hypodermis, play an important role during molting. We followed the molecular composition and distribution of integrin mediated adhesion structures called dense bodies (DB), which indirectly connect muscles to the hypodermis. We found the concentration of two DB proteins (PAT-3/beta-integrin and UNC-95) to decrease during the quiescent phase of molting, concomitant with an apparent increase in lateral movement of the DB. We show that levels of the E3-ligase RNF-5 increase specifically during molting, and that RNF-5 acts to ubiquitinate the DB protein UNC-95. Persistent high levels of RNF-5 driven by a heatshock or unc-95 promoter lead to failure of ecdysis, and in non-molting worms to a progressive detachment of the cuticle from the hypodermis. These observations indicate that increased DB dynamics characterizes the lethargus phase of molting in parallel to decreased levels of DB components and that temporal expression of RNF-5 contributes to an efficient molting process.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
May
pubmed:issn
1090-2104
pubmed:author
pubmed:copyrightInfo
Copyright (c) 2010 Elsevier Inc. All rights reserved.
pubmed:issnType
Electronic
pubmed:day
14
pubmed:volume
395
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
509-14
pubmed:meshHeading
pubmed:year
2010
pubmed:articleTitle
Molting-specific downregulation of C. elegans body-wall muscle attachment sites: the role of RNF-5 E3 ligase.
pubmed:affiliation
Department of Cell and Developmental Biology, Sackler School of Medicine, Tel-Aviv University, Tel-Aviv 69978, Israel.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't, Research Support, N.I.H., Extramural