title: LIM-only protein Lmo2 forms a protein complex with erythroid transcription factor GATA-1.
abstract: The LIM-only protein Lmo2, originally identified as an oncogenic protein in human T cell leukemia, is essential for erythropoiesis. A possible role for Lmo2 in transcription during erythropoiesis has been investigated. Direct interaction of Lmo2 was observed in vitro and in vivo with the zinc finger transcription factor GATA-1, as well as with the basic helix-loop-helix (bHLH) transcription factor Tall. By using mammalian two-hybrid analysis, E47/Tall/Lmo2/GATA-1 protein complex could be demonstrated. Thus, a molecular link exists between three proteins crucial for erythropoiesis. This data suggest that variations in amounts of complexes involving Lmo2, Tall, and GATA-1 could be important for erythroid differentiation.
authors.affiliation: Laboratory of Molecular Biology, Medical Research Council, Cambridge, United Kingdom.
authors.forename: H
authors.initials: H
authors.lastname: Osada
authors.forename: G G
authors.initials: GG
authors.lastname: Grutz
authors.forename: H
authors.initials: H
authors.lastname: Axelson
authors.forename: A
authors.initials: A
authors.lastname: Forster
authors.forename: T H
authors.initials: TH
authors.lastname: Rabbitts
mesh_terms: D048868:Adaptor Proteins, Signal Transducing; D000818:Animals; D051792:Basic Helix-Loop-Helix Proteins; D019556:COS Cells; D004268:DNA-Binding Proteins / Q000302:isolation & purification / Q000378:metabolism*; D050981:Erythroid-Specific DNA-Binding Factors; D004920:Erythropoiesis; D050982:GATA1 Transcription Factor; D018257:Helix-Loop-Helix Motifs; D006801:Humans; D060588:LIM Domain Proteins; D004915:Leukemia, Erythroblastic, Acute; D015458:Leukemia, T-Cell / Q000378:metabolism; D008667:Metalloproteins / Q000302:isolation & purification / Q000378:metabolism*; D011518:Proto-Oncogene Proteins / Q000378:metabolism; D011994:Recombinant Proteins / Q000302:isolation & purification / Q000378:metabolism; D000073942:T-Cell Acute Lymphocytic Leukemia Protein 1; D014157:Transcription Factors / Q000302:isolation & purification / Q000378:metabolism*; D014158:Transcription, Genetic; D014162:Transfection; D014407:Tumor Cells, Cultured; D016335:Zinc Fingers
chemical_list: D048868:Adaptor Proteins, Signal Transducing; D051792:Basic Helix-Loop-Helix Proteins; D004268:DNA-Binding Proteins; D050981:Erythroid-Specific DNA-Binding Factors; D050982:GATA1 Transcription Factor; D060588:LIM Domain Proteins; D008667:Metalloproteins; D011518:Proto-Oncogene Proteins; D011994:Recombinant Proteins; D000073942:T-Cell Acute Lymphocytic Leukemia Protein 1; D014157:Transcription Factors; C494688:GATA1 protein, human; C085117:LMO2 protein, human; C067143:TAL1 protein, human