Linked Life Data

1651329

Source:http://linkedlifedata.com/resource/pubmed/id/1651329

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
23
pubmed:dateCreated
1991-9-13
pubmed:abstractText
We report the purification and characterization of an active catalytic fragment of Ca2+/calmodulin-dependent protein kinase II, derived from autophosphorylation and subsequent limited chymotryptic digestion of the purified rat forebrain soluble kinase. The purified fragment was completely Ca2+/calmodulin-independent, existed as a monomer, and phosphorylated synapsin I at the same sites as does the native form of Ca2+/calmodulin-dependent protein kinase II. Kinetic studies with the purified fragment revealed a more than 10-fold increase in Vmax and a 50% decrease in Km for synthetic peptide substrates, compared with native Ca2+/calmodulin-dependent protein kinase II. No 32P-labeled autophosphorylated residues were detected in the purified active fragment, indicating that the autophosphorylation sites were not contained within this fragment. Comparative studies of this active fragment (30 kDa) and its inactive counterpart (32-kDa fragment) revealed certain structural details of both fragments. Calmodulin-overlay study, immunoblot analysis, and direct amino acid sequencing suggest that both fragments contain the entire NH2-terminal catalytic domain and were generated by distinct cleavage within the regulatory domain. The putative cleavage sites for both fragments are discussed.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Aug
pubmed:issn
0021-9258
pubmed:author
pubmed:issnType
Print
pubmed:day
15
pubmed:volume
266
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
15391-7
pubmed:dateRevised
2009-11-19
pubmed:meshHeading
pubmed:year
1991
pubmed:articleTitle
Active catalytic fragment of Ca2+/calmodulin-dependent protein kinase II. Purification, characterization, and structural analysis.
pubmed:affiliation
Laboratory of Molecular and Cellular Neuroscience, Rockefeller University, New York, New York 10021.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S., Research Support, Non-U.S. Gov't