Linked Life Data

8499346

Source:http://linkedlifedata.com/resource/pubmed/id/8499346

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
5
pubmed:dateCreated
1993-6-25
pubmed:abstractText
The enzyme, 11 beta-hydroxysteroid dehydrogenase converts the active glucocorticoids cortisol and corticosterone to their inactive 11-oxo metabolites cortisone and dehydrocorticosterone, respectively. The properties of the human placental 11 beta-hydroxysteroid dehydrogenase (11 beta-HSD) were studied. The enzyme was active in the oxidative and reductive directions. pH optimum for 11 beta-dehydrogenase activity was in the range of 7-10 and for 11-oxoreductase it was in the range of 5.5-6.0. The crude placental homogenate was unstable. Reductase activity was more labile than dehydrogenase activity. Removal of cytosol enabled the enzyme to retain activity. 11 beta-HSD a membrane bound enzyme was distributed in all particulate subcellular fractions. Addition of detergent released latent activity of 11 beta-dehydrogenase and inactivated 11-reductase activity. Both corticosterone and cortisol were substrates for the enzyme. The Km value with corticosterone as substrate was much lower than with cortisol. The Km values with cortisone and dehydrocorticosterone were similar.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
May
pubmed:issn
0960-0760
pubmed:author
pubmed:issnType
Print
pubmed:volume
45
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
391-7
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1993
pubmed:articleTitle
Characterization of 11 beta-hydroxysteroid dehydrogenase of human placenta: evidence for the existence of two species of 11 beta-hydroxysteroid dehydrogenase.
pubmed:affiliation
Department of Obstetrics and Gynecology, SUNY Health Science Center, Brooklyn 11203.
pubmed:publicationType
Journal Article, Comparative Study