Molecular cloning of rat transcription factor YY1.
YY1 is a ubiquitously expressed multifunctional transcription factor that is involved in both positive and negative regulation of gene expression as well as initiation of transcription. Here, we isolated cDNA encoding a full-length open reading frame (ORF) of rat YY1. Rat YY1 is composed of 411 amino acid residues and its amino acid sequence is 97.6% identical to that of mouse YY1 and 97.8% identical to that of human YY1. The transactivating abilities of wild-type rat YY1 and four truncated mutant forms of YY1 were examined by transient reporter assays. When residues 114-193, which sequence includes a portion of the activation region and most of the Gly/Lys-rich region, were lacking, transactivation activity decreased somewhat, but the further deletion in the activation region (of residues 56-113) did not cause further decrease of the activity. On the other hand, N-terminus of the activation region (1-78/100-106) did not have transactivation activity by itself as well as synergistic activity with an erythroid specific transcription factor GATA-1.
Nishiyama
Chiharu
C
Atopy (Allergy) Research Center, Juntendo University School of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo 113-8421, Japan. chinishi@med.juntendo.ac.jp
Yokota
Toyokazu
T
Nishiyama
Makoto
M
Ra
Chisei
C
Okumura
Ko
K
Ogawa
Hideoki
H
D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D003001:Cloning, Molecular; D018076:DNA, Complementary / Q000235:genetics; D004268:DNA-Binding Proteins / Q000378:metabolism; D050981:Erythroid-Specific DNA-Binding Factors; D050982:GATA1 Transcription Factor; D006801:Humans; D051379:Mice; D008969:Molecular Sequence Data; D016366:Open Reading Frames / Q000235:genetics; D010957:Plasmids; D011401:Promoter Regions, Genetic; D051381:Rats; D016415:Sequence Alignment; D017386:Sequence Homology, Amino Acid; D014157:Transcription Factors / Q000737:chemistry / Q000235:genetics* / Q000378:metabolism; D015533:Transcriptional Activation / Q000235:genetics; D014162:Transfection / Q000379:methods; D014407:Tumor Cells, Cultured; D050986:YY1 Transcription Factor
D018076:DNA, Complementary; D004268:DNA-Binding Proteins; D050981:Erythroid-Specific DNA-Binding Factors; D050982:GATA1 Transcription Factor; C494688:GATA1 protein, human; C494689:Gata1 protein, mouse; C494690:Gata1 protein, rat; D014157:Transcription Factors; D050986:YY1 Transcription Factor; C494698:YY1 protein, human; C494699:Yy1 protein, mouse; C494700:Yy1 protein, rat