Linked Life Data

10950830

Source:http://linkedlifedata.com/resource/pubmed/id/10950830

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
2000-9-19
pubmed:abstractText
Carp (Cyprinus carpio), a freshwater fish that lives in a low-calcium environment, and Atlantic cod (Gadus morhua), a seawater fish that lives in a high-calcium environment, were studied for the presence of a novel membrane binding protein ("receptor") for the vitamin D metabolite, 1,25-dihydroxyvitamin D(3) [1,25(OH)(2)D(3)]. Basal lateral membranes from enterocytes of either species were prepared and analyzed for specific saturable binding. Membranes from carp revealed a dissociation constant of 1.23 nM with a maximal binding capacity of 212 fmol/mg protein. In comparison, membranes from Atlantic cod enterocytes revealed very low and nonsignificant levels of specific binding. The [(3)H]1,25(OH)(2)D(3) binding activity in carp was further characterized for protein dependence, detergent extractability, and competition for binding with the metabolites 25(OH)D(3) and 24R,25(OH)(2)D(3). Finally, introduction of 1,25(OH)(2)D(3) to isolated carp enterocytes enhanced protein kinase C activity within 5 min, whereas intracellular Ca(2+) concentrations were unaffected by a range of 1,25(OH)(2)D(3) concentrations, as judged by fura 2 fluorescence. Thus the binding moiety may be a putative plasma membrane receptor for vitamin D, because it is functionally coupled to at least one signal transduction pathway.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Sep
pubmed:issn
0193-1849
pubmed:author
pubmed:issnType
Print
pubmed:volume
279
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
E614-21
pubmed:dateRevised
2007-11-15
pubmed:meshHeading
pubmed:year
2000
pubmed:articleTitle
A specific binding moiety for 1,25-dihydroxyvitamin D(3) in basal lateral membranes of carp enterocytes.
pubmed:affiliation
Department of Nutrition and Food Sciences and the Biotechnology Center, Utah State University, Logan 84322, USA. nemere@cc.usu.edu
pubmed:publicationType
Journal Article, In Vitro, Research Support, Non-U.S. Gov't