OAZ uses distinct DNA- and protein-binding zinc fingers in separate BMP-Smad and Olf signaling pathways.
We have identified the 30-zinc finger protein OAZ as a DNA-binding factor that associates with Smads in response to BMP2, forming a complex that transcriptionally activates the homeobox regulator of Xenopus mesoderm and neural development, Xvent-2. OAZ contains a BMP signaling module formed by two clusters of fingers that bind Smads and the Xvent-2 BMP response element, respectively. Previously implicated as a transcriptional partner of Olf-1/EBF in olfactory epithelium and lymphocyte development in the rat, OAZ fulfills this role through clusters of fingers that are separate from the BMP signaling module. The mutually exclusive use of OAZ by the BMP-Smad and Olf pathways illustrates the dual role of a multi-zinc finger protein in signal transduction during development.
Hata
A
A
Cell Biology Program, Howard Hughes Medical Institute, Memorial Sloan-Kettering Cancer Center, New York, New York 10021, USA.
Seoane
J
J
Lagna
G
G
Montalvo
E
E
Hemmati-Brivanlou
A
A
Massagué
J
J
D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D051792:Basic Helix-Loop-Helix Proteins; D019485:Bone Morphogenetic Proteins / Q000235:genetics* / Q000378:metabolism; D019556:COS Cells; D002467:Cell Nucleus / Q000737:chemistry; D003001:Cloning, Molecular; D004268:DNA-Binding Proteins / Q000032:analysis / Q000235:genetics* / Q000378:metabolism / Q000502:physiology*; D018507:Gene Expression Regulation, Developmental / Q000502:physiology; D017930:Genes, Reporter; D018398:Homeodomain Proteins / Q000235:genetics / Q000378:metabolism; D006801:Humans; D007763:Lac Operon; D008969:Molecular Sequence Data; D009419:Nerve Tissue Proteins / Q000378:metabolism; D009865:Oocytes / Q000502:physiology; D011485:Protein Binding / Q000502:physiology; D011506:Proteins; D051381:Rats; D015398:Signal Transduction / Q000502:physiology*; D051785:Smad Proteins; D051899:Smad2 Protein; D051900:Smad3 Protein; D015534:Trans-Activators / Q000502:physiology*; D014157:Transcription Factors / Q000032:analysis / Q000235:genetics* / Q000378:metabolism / Q000502:physiology*; D014158:Transcription, Genetic / Q000502:physiology; D014981:Xenopus; D029867:Xenopus Proteins / Q000032:analysis / Q000235:genetics* / Q000378:metabolism / Q000502:physiology*; D015003:Yeasts / Q000235:genetics; D016335:Zinc Fingers / Q000235:genetics*
D051792:Basic Helix-Loop-Helix Proteins; D019485:Bone Morphogenetic Proteins; D004268:DNA-Binding Proteins; D018398:Homeodomain Proteins; D009419:Nerve Tissue Proteins; D011506:Proteins; D051785:Smad Proteins; D051899:Smad2 Protein; D051900:Smad3 Protein; D015534:Trans-Activators; D014157:Transcription Factors; D029867:Xenopus Proteins; C091514:BABAM2 protein, human; C081976:EBF1 protein, human; C489920:Ebf1 protein, rat; C497782:SMAD2 protein, human; C497790:SMAD3 protein, human; C497785:Smad2 protein, Xenopus; C497784:Smad2 protein, rat; C497787:Smad3 protein, rat; C569820:ZNF423 protein, Xenopus; C489924:ebf2 protein, Xenopus; C497789:madh3 protein, Xenopus; C031017:ornithine decarboxylase antizyme; C112507:ventx1.2 protein, Xenopus; C099992:ventx2.1 protein, Xenopus