Linked Life Data

3169143

Source:http://linkedlifedata.com/resource/pubmed/id/3169143

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
1988-11-23
pubmed:abstractText
By means of immunobiochemical and immunocytological techniques it was found that the aggregation factor (AF) from the sponge Geodia cydonium is stored in vesicles of spherulous cells. During the reaggregation process of dissociated cells, the AF which is present extracellularly was determined to be bound to the cell-surface-associated aggregation receptor (AR) only during the initial phase (0-5 h after addition of the AF to the single cell suspension). At later stages (20 h), the AF colocalized with extracellular structures, e.g., collagen and glycoconjugates. Immobilized to nitrocellulose, the AR, a molecule with Mr of 43.5 kDa, displayed its binding affinity to the AF only if it was isolated from early aggregates (5 h). The transition of the AF-susceptible to the AF-deficient state of the plasma membrane was mimicked in vitro by incubation of plasma membranes from early aggregates with purified protein kinase C. This conversion to the AF-deficient state could be prevented by the protein kinase C inhibitor staurosporine. Together with earlier findings, which revealed that the AR is phosphorylated by protein kinase C, we propose that in the sponge system this enzyme controls intercellular processes involved in morphogenesis.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Nov
pubmed:issn
0014-4827
pubmed:author
pubmed:issnType
Print
pubmed:volume
179
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
243-52
pubmed:dateRevised
2007-11-15
pubmed:meshHeading
pubmed:year
1988
pubmed:articleTitle
Control of the aggregation factor-aggregation receptor interaction in sponges by protein kinase C.
pubmed:affiliation
Institut für Physiologische Chemie, Universität, Mainz, West Germany.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't