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The pituitary-specific transcription factor GHF-1 is a homeobox-containing protein.

Authors: Bodner, M  Castrillo, JL  Theill, LE  Deerinck, T  Ellisman, M  Karin, M 
Citation: Bodner M, etal., Cell 1988 Nov 4;55(3):505-18.
Pubmed: (View Article at PubMed) PMID:2902927

Growth hormone factor 1 (GHF-1) is a pituitary-specific transcription factor that plays a critical role in cell type-specific expression of the growth hormone (GH) gene. Here, we describe the isolation of bovine and rat GHF-1 cDNA clones. These cDNAs encode proteins whose molecular mass, 33K, is identical to purified GHF-1 and whose sequence agrees with a partial GHF-1 peptide sequence. The predicted GHF-1 sequence contains a region, near its C-terminus, that exhibits considerable similarity to a homeobox consensus sequence. DNAase I footprinting with bacterially expressed fusion protein containing a fragment of GHF-1 encompassing the homeobox indicates that this region of the protein functions as its DNA binding domain. Expression of GHF-1 is restricted to cells of the somatotropic lineage in the pituitary. This remarkable specificity of GHF-1 expression correlates with the selective transcription of its target, the GH gene. Other mammalian homeobox-containing proteins may function similarly as transcription factors controlling cell type-specific expression in other locations.

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CRRD Object Information
CRRD ID: 729670
Created: 2003-11-26
Species: All species
Last Modified: 2004-05-25
Status: ACTIVE



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