Linked Life Data

8081730

Source:http://linkedlifedata.com/resource/pubmed/id/8081730

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
1994-10-10
pubmed:databankReference
pubmed:abstractText
A cDNA encoding the beta subunit of the Xenopus muscle nicotinic acetylcholine receptor (AChR) was cloned from an embryonic Xenopus cDNA library. The predicted mature polypeptide has 469 amino acids and four membrane spanning regions corresponding to the M1-M4 regions identified in other AChR subunit clones. The polypeptide bears greater homology to beta subunits of Torpedo and mouse than to alpha, gamma or delta subunits of Xenopus. The earliest beta subunit transcripts were detected by RNase protection assays at the neural plate stage of development (stage 14) and the level of transcripts, as a fraction of total RNA, continued to increase through the age of hatching (stages 34-36). Co-injection of Xenopus alpha, beta, gamma and delta cRNAs into Xenopus oocytes led to expression of functional AChRs. Micromolar concentrations of ACh activated depolarizing AChR currents which reversed at -5 mV and were blocked by alpha bungarotoxin. Injection of alpha, gamma and delta subunits alone did not yield detectable ACh responses. With the cloning of the Xenopus beta subunit, structure/function relations of AChRs can now be studied using receptors composed entirely of Xenopus subunits.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:issn
1060-6823
pubmed:author
pubmed:issnType
Print
pubmed:volume
2
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
23-31
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1994
pubmed:articleTitle
Structure and expression of the nicotinic acetylcholine receptor beta subunit of Xenopus laevis.
pubmed:affiliation
Department of Biological Sciences, University of Alaska, Anchorage 99508.
pubmed:publicationType
Journal Article, Comparative Study, Research Support, U.S. Gov't, P.H.S., Research Support, Non-U.S. Gov't