Nucleic Acids Research, 1992, Vol. 20, No. 5 1087-1091
© 1992
MOLECULAR BIOLOGY |
Evolutionary variation of the CCAAT-binding transcription factor NF-Y
Laboratoire de Génétique Moléculaire des Eucaryotes du CNRS, Unité 184 de Biologie Moleculaire et de Génie Génétique de I'INSERM, Institut de Chimie Biologique, Faculté de Médecine Strasbourg, France
*To whom correspondence should be addressed
Received November 21, 1991. Revised February 3, 1992. Accepted February 3, 1992.
NF-Y is a CCAAT-speclfic transcription factor thought to be involved in the regulation of a variety of eukaryotic genes. It shows a striking sequence similarity with the yeast factor HAP2/3. In an attempt to trace back its evolutionary history, we succeeded in Isolating NF-Y cDNA clones from a plant and from several species of vertebrates. The patterns of sequence conservation delineate potential functional domains: A central, highly conserved, domain likely responsible for DNA-binding and subunlt interaction; more evolutionatily flexible flanking regions, In which variability is clustered, individualizing conserved glutamine or acidic amino-acids putatively involved in protein-protein contacts.
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