Linked Life Data

11942626

Source:http://linkedlifedata.com/resource/pubmed/id/11942626

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
6
pubmed:dateCreated
2002-4-10
pubmed:databankReference
pubmed:abstractText
Activity of nonmuscle myosin II is regulated by phosphorylation of its regulatory light chain (MRLC). Phosphoryration of MRLC at both Thr18 and Ser19 (diphosphorylation) results in higher MgATPase activity and in promotion of the assembly of myosin II filaments than does that of MRLC at Ser19 (monophosphorylation) in vitro. To determine the roles of the diphosphorylated MRLC in vivo, we transfected three kinds of MRLC mutants, unphosphorylated, monophosphorylated and diphosphorylated forms (MRLC2(T18AS19A), substitution of both Ser19 and Thr18 by Ala; MRLC2(T18AS19D), Ser19 by Asp and Thr18 by Ala; and MRLC2(T18DS19D), both Ser19 and Thr18 by Asp, respectively), into HeLa cells. Cells overexpressing the mutant MRLC2(T18DS19D) contained a larger number of actin filament bundles than did those overexpressing the mutant MRLC2(T18AS19D). Moreover, cells overexpressing the nonphosphorylatable mutant MRLC2(T18AS19A) showed a decrease in the number of actin filament bundles. Taken together, our data suggest that diphosphorylation of MRLC plays an important role in regulating actin filament assembly and reorganization in nonmuscle cells.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Dec
pubmed:issn
0386-7196
pubmed:author
pubmed:issnType
Print
pubmed:volume
26
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
677-83
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
2001
pubmed:articleTitle
Diphosphorylated MRLC is required for organization of stress fibers in interphase cells and the contractile ring in dividing cells.
pubmed:affiliation
Department of Biological Science, Graduate School of Science, Hiroshima University, Higashi-Hiroshima, Japan.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't