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Titolo:
RETINOID X RECEPTOR HOMODIMERS FUNCTION AS TRANSCRIPTIONAL ACTIVATORSIN YEAST
Autore:
MAK P; FUERNKRANZ HA; GE RW; KARATHANASIS SK;
Indirizzi:
AMER CYANAMID CO,LEDERLE LABS,DEPT CARDIOVASC MOLEC BIOL,401 N MIDDLETOWN RD,BLDG 200,ROOM 4703 PEARL RIVER NY 10965 AMER CYANAMID CO,LEDERLE LABS,DEPT CARDIOVASC MOLEC BIOL PEARL RIVER NY 10965
Titolo Testata:
Gene
fascicolo: 1, volume: 145, anno: 1994,
pagine: 129 - 133
SICI:
0378-1119(1994)145:1<129:RXRHFA>2.0.ZU;2-9
Fonte:
ISI
Lingua:
ENG
Soggetto:
APOLIPOPROTEIN-A-I; CONTROL EXPRESSION; C-III; ACID; GENE; SUPERFAMILY; ARP-1;
Keywords:
APOLIPOPROTEIN AI; RXR-ALPHA; RETINOIC ACID SIGNALING IN YEAST;
Tipo documento:
Note
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
20
Recensione:
Indirizzi per estratti:
Citazione:
P. Mak et al., "RETINOID X RECEPTOR HOMODIMERS FUNCTION AS TRANSCRIPTIONAL ACTIVATORSIN YEAST", Gene, 145(1), 1994, pp. 129-133

Abstract

The possibility that different retinoids activate transcription from a specific retinoic acid (RA)-responsive element known as site A via different home and heterodimeric versions of RA receptors cannot be evaluated in mammalian cells because they contain endogenous RA receptors(RAR). However, this limitation can be overcome by using yeast cells,which do not contain endogenous RAR, to study retinoid signaling pathways. Here, we describe heterologous expression of the human retinoid X receptor (RXR alpha) in yeast and hormone-dependent activation of a reporter construct containing site A upstream from a yeast promoter fused to the lacZ gene of Escherichia coli. Western blot analysis of yeast extracts containing RXR alpha revealed a distinct immunoreactive polypeptide co-migrating with the mammalian-produced RXR alpha. Electrophoretic mobility shift assays demonstrated that RXR alpha. produced inyeast binds efficiently to site A in the absence of 9-cis-RA. However, transcription activation experiments showed that RXR alpha transactivates a yeast basal promoter linked to site A only in the presence of 9-cis-RA. We conclude that RXR alpha homodimers bind to site A in the absence of 9-cis-RA, but function as ligand-dependent transactivators in yeast cells. This retinoid-responsive transcription unit created inyeast cells provides a powerful genetic tool for the systematic unraveling of the synergistic interactions between RXR alpha and its heterodimeric partners.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/12/20 alle ore 22:26:30