Runt domain
Encyclopedia
The Runt domain is an evolutionary conserved protein domain
Protein domain
A protein domain is a part of protein sequence and structure that can evolve, function, and exist independently of the rest of the protein chain. Each domain forms a compact three-dimensional structure and often can be independently stable and folded. Many proteins consist of several structural...

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The AML1
RUNX1
Runt-related transcription factor 1 also known as acute myeloid leukemia 1 protein or core-binding factor subunit alpha-2 is a protein that in humans is encoded by the RUNX1 gene....

/RUNX1 gene is rearranged by the t(8;21) translocation in acute myeloid leukemia. The gene is highly similar to the Drosophila melanogaster
Drosophila melanogaster
Drosophila melanogaster is a species of Diptera, or the order of flies, in the family Drosophilidae. The species is known generally as the common fruit fly or vinegar fly. Starting from Charles W...

segmentation gene runt and to the mouse transcription factor PEBP2 alpha subunit gene. The region of shared similarity, known as the Runt domain, is responsible for DNA-binding and protein-protein interaction.

In addition to the highly-conserved Runt domain, the AML-1 gene product carries a putative ATP-binding site (GRSGRGKS), and has a C-terminal region rich in proline and serine residues. The protein (known as acute myeloid leukemia 1 protein, oncogene AML-1, core-binding factor (CBF), alpha-B subunit, etc.) binds to the core site, 5'-pygpyggt-3', of a number of enhancers and promoters.

The protein is a heterodimer of alpha- and beta-subunits. The alpha-subunit binds DNA as a monomer, and appears to have a role in the development of normal hematopoiesis. CBF is a nuclear protein expressed in numerous tissue types, except brain and heart; highest levels have been found to occur in thymus, bone marrow and peripheral blood.

This domain occurs towards the N-terminus of the proteins in this entry.

Examples

Human genes encoding proteins containing this domain include:
  • RUNX1
    RUNX1
    Runt-related transcription factor 1 also known as acute myeloid leukemia 1 protein or core-binding factor subunit alpha-2 is a protein that in humans is encoded by the RUNX1 gene....

    , RUNX2
    Runx2
    Runt-related transcription factor 2 also known as core-binding factor subunit alpha-1 is a protein that in humans is encoded by the RUNX2 gene RUNX2 is a key transcription factor associated with osteoblast differentiation....

    , RUNX3
    RUNX3
    Runt-related transcription factor 3 is a protein that in humans is encoded by the RUNX3 gene.- Knockout mouse :Runx3 null mouse gastric mucosa exhibits hyperplasia due to stimulated proliferation and suppressed apoptosis in epithelial cells, and the cells are resistant to TGF-beta...

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