Linked Life Data

6243498

Source:http://linkedlifedata.com/resource/pubmed/id/6243498

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
1980-4-17
pubmed:abstractText
The interaction of the taste substance monosodium L-glutamate with taste receptors has been investigated. Binding of L-[3H]glutamate was measured to preparations of bovine circumvallate (taste) papillae (type I preparation) and to control tongue epithelial preparations (type II preparation) devoid of taste receptors. Binding is operationally defined using a membrane filtration assay. Substantially greater binding occurred to the type I preparation than to the type II preparation, and the binding to the type I preparation showed evidence of saturation. The apparent Kd of L-glutamate was estimated to be in the range of 20--30 mM. The unique taste effect of L-glutamate was considered to depend importantly on its demonstrated synergism in combination with certain 5'-ribonucleotides. A several-fold enhancement of binding of L-[3H]glutamate occurred in the presence of certain 5'-ribonucleotides. 5'-GMP, 5'-IMP and 5'-UMP each increased the binding of L-[3H]glutamate, while 5'-XMP, 5'-AMP and 5'-CMP did not. None of these nucleotides affected the lower level of binding to the type II preparation. Neither the free bases, adenine and guanine, their nucleosides nor their di- or triphosphonucleotides were effective in increasing L-[3H]glutamate binding to the type I preparation. The nucleotide specificity of the glutamate binding enhancement therefore shows a marked similarity with the nucleotide specificity in evoking the synergistic taste effect in humans.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Feb
pubmed:issn
0006-3002
pubmed:author
pubmed:issnType
Print
pubmed:day
7
pubmed:volume
627
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
313-23
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1980
pubmed:articleTitle
Biochemical studies of taste sensation. IX. Enhancement of L-[3H]glutamate binding to bovine taste papillae by 5'-ribonucleotides.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S.