Linked Life Data

8392074

Source:http://linkedlifedata.com/resource/pubmed/id/8392074

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
20
pubmed:dateCreated
1993-8-12
pubmed:abstractText
Activation of protein C by thrombin is stimulated by the endothelial cell cofactor thrombomodulin. The structural regions of thrombomodulin necessary for cofactor activity have been localized to the fourth through sixth epidermal growth factor (EGF)-like domains. The fourth EGF-like domain is unnecessary for high affinity thrombin binding, but is required for cofactor activity. To identify essential sequences within the fourth EGF-like domain, a series of recombinant human thrombomodulins consisting of EGF-like domains four through six were expressed in human kidney cells. These mutants contain replacements of disulfide loops within the fourth EGF-like domain, thereby conserving overall disulfide bond structure. All of the mutants bound to thrombin with high affinity, and inhibited the fibrinogen-clotting activity of thrombin to a similar extent. Two regions of the fourth EGF-like domain were identified to be essential for cofactor activity: 1) the sequence consisting of amino acids Glu-357, Tyr-358, and Gln-359 shared by the overlapping first and second disulfide loops, and 2) the amino-terminal region of the third disulfide loop containing amino acids Glu-374, Gly-375, and Phe-376. These results suggest that amino acids critical for thrombomodulin cofactor activity are located near the junction between the two subdomains of the fourth EGF-like domain.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jul
pubmed:issn
0021-9258
pubmed:author
pubmed:issnType
Print
pubmed:day
15
pubmed:volume
268
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
15312-7
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1993
pubmed:articleTitle
Sequences required for thrombomodulin cofactor activity within the fourth epidermal growth factor-like domain of human thrombomodulin.
pubmed:affiliation
Department of Internal Medicine, University of Iowa, Iowa City 52242.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S., Research Support, Non-U.S. Gov't