Linked Life Data

1316867

Source:http://linkedlifedata.com/resource/pubmed/id/1316867

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
1992-6-23
pubmed:abstractText
A rapidly inducible and tightly regulated system for the expression of protein in yeast is based on a chimeric promoter constructed of two copies of a vitellogenin-estrogen-response element (ERE) which are inserted upstream from the promoter of the yeast gene encoding iso-1-cytochrome c. The chimeric promoter was inserted in a yeast expression plasmid upstream from the coding sequence of ubiquitin fused in frame to a cDNA encoding the full-length chicken progesterone receptor A (cPRA). The resultant plasmid (YEpA2) was co-transformed in Saccharomyces cerevisiae with a plasmid which encodes the human estrogen receptor. Estradiol (E2)-induced transactivation of the chimeric promoter results in transcription of the cPRA gene from YEpA2, and synthesis of cPRA. The fusion protein, ubiquitin-cPRA, is rapidly cleaved in vivo to produce cPRA. Analysis of samples by Western immunoblot shows that cPRA is almost undetectable in the absence of E2, and that treatment with 50 nM E2 results in a 500-1000-fold induction of cPRA (0.06-0.3% of the total protein) after 1 h. The plasmid-expressed soluble receptor is stable and demonstrates the correct affinity for its ligand. We have prepared yeast extracts using enzymatic digestion of the cell wall with oxalyticase followed by hypotonic shock. This has resulted in a dramatic increase in the % of receptor which binds hormone compared to previous studies which used mechanical disruption techniques. The cPRA is biologically active since it activates transcription of a co-transformed reporter gene containing its response element.(ABSTRACT TRUNCATED AT 250 WORDS)
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
May
pubmed:issn
0378-1119
pubmed:author
pubmed:issnType
Print
pubmed:day
1
pubmed:volume
114
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
51-8
pubmed:dateRevised
2008-11-21
pubmed:meshHeading
pubmed:year
1992
pubmed:articleTitle
A novel, highly regulated, rapidly inducible system for the expression of chicken progesterone receptor, cPRA, in Saccharomyces cerevisiae.
pubmed:affiliation
Department of Cell Biology, Baylor College of Medicine, Houston, TX 77030.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S.