Abstract
Mutations in the genes encoding the interacting proteins AML1 and CBFbeta are the most common genetic abnormalities in acute leukaemia, and congenital mutations in the related AML3 gene are associated with disorders of osteogenesis. Furthermore, the interaction of AML1 with CBFbeta is essential for haematopoiesis. We report the 2.6 A resolution crystal structure of the complex between the AML1 Runt domain and CBFbeta, which represents a paradigm for the mode of interaction of this highly conserved family of transcription factors. The structure demonstrates that point mutations associated with cleidocranial dysplasia map to the conserved heterodimer interface, suggesting a role for CBFbeta in osteogenesis, and reveals a potential protein interaction platform composed of conserved negatively charged residues on the surface of CBFbeta.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Acute Disease
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Amino Acid Sequence
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Conserved Sequence
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Core Binding Factor Alpha 2 Subunit
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Crystallography
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DNA-Binding Proteins / chemistry*
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DNA-Binding Proteins / genetics
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DNA-Binding Proteins / metabolism
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Dimerization
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Drosophila Proteins
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Humans
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Leukemia*
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Models, Molecular
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Molecular Sequence Data
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Neoplasm Proteins / chemistry*
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Neoplasm Proteins / genetics
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Neoplasm Proteins / metabolism
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Nuclear Proteins
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Peptide Fragments / chemistry
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Protein Binding
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Proto-Oncogene Proteins*
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Recombinant Proteins / chemistry
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Recombinant Proteins / metabolism
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Sequence Homology, Amino Acid
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Static Electricity
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Surface Properties
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Transcription Factor AP-2
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Transcription Factors / chemistry*
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Transcription Factors / genetics
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Transcription Factors / metabolism
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Translocation, Genetic
Substances
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Core Binding Factor Alpha 2 Subunit
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DNA-Binding Proteins
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Drosophila Proteins
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Neoplasm Proteins
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Nuclear Proteins
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Peptide Fragments
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Proto-Oncogene Proteins
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RUNX1 protein, human
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Recombinant Proteins
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Transcription Factor AP-2
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Transcription Factors
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run protein, Drosophila