Linked Life Data

8569754

Source:http://linkedlifedata.com/resource/pubmed/id/8569754

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:dateCreated
1996-3-7
pubmed:abstractText
Glycogen synthase, the regulatory enzyme of glycogen synthesis undergoes multisite phosphorylation leading to its inactivation. The kinases responsible for this covalent modification (ex. cAMP-dependent protein kinase, protein kinase C and glycogen synthase kinase-3) are controlled by the second messengers generated by different hormones. The isolated hepatocytes has been used as one of the experimental models for studying this complex regulatory process. Inactivation of glycogen synthase by glucagon and vasopressin has been shown to be accompanied with incorporation of phosphate into the enzyme protein. Insulin has been shown to activate glycogen synthase by inhibition of kinases and activation of synthase phosphatase. Glycogen synthase is activated by several gluconeogenic substrates, in addition to glucose. Studies in hepatocytes with activators and inhibitors of protein kinase C show that this enzyme negatively controls glycogen synthase. The differential effects of the phosphatase inhibitors, calyculin A and okadaic acid in liver cells provide supporting evidence that protein phosphatase type-1 plays a major role in the regulation of glycogen synthase. Hepatocytes isolated from diabetic rats of both types (insulin-dependent and non-insulin-dependent) mimic the defective glycogen synthase activation seen in vivo.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:issn
0300-8177
pubmed:author
pubmed:issnType
Print
pubmed:volume
149-150
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
95-101
pubmed:dateRevised
2009-11-19
pubmed:meshHeading
pubmed:articleTitle
Regulation of glycogen synthase activation in isolated hepatocytes.
pubmed:affiliation
Department of Biochemistry, University of Saskatchewan, Saskatoon, Canada.
pubmed:publicationType
Journal Article, Review, Research Support, Non-U.S. Gov't