Molecular characterization of cbfβ gene and identification of new transcription variants: Implications for function

Simões, B., Conceição, N., Matias, A.C., Bragança, J., Kelsh, R.N., Cancela, M.L.
Archives of biochemistry and biophysics   567: 1-12 (Journal)
Registered Authors
Cancela, Leonor, Kelsh, Robert
Alternative splicing, Functional analysis, Runx2, Transcription factor, Zebrafish, cbfβ
MeSH Terms
  • Amino Acid Sequence
  • Animals
  • Chromosomes/genetics
  • Cloning, Molecular
  • Conserved Sequence
  • Core Binding Factor Alpha 1 Subunit/metabolism
  • Core Binding Factor beta Subunit/biosynthesis
  • Core Binding Factor beta Subunit/chemistry
  • Core Binding Factor beta Subunit/genetics*
  • Core Binding Factor beta Subunit/metabolism*
  • Gene Expression Regulation, Developmental
  • Molecular Sequence Data
  • Protein Biosynthesis
  • Protein Isoforms/biosynthesis
  • Protein Isoforms/chemistry
  • Protein Isoforms/genetics
  • Protein Isoforms/metabolism
  • Sequence Alignment
  • Transcription, Genetic*
  • Zebrafish/embryology
  • Zebrafish/genetics
  • Zebrafish Proteins/biosynthesis
  • Zebrafish Proteins/chemistry
  • Zebrafish Proteins/genetics*
  • Zebrafish Proteins/metabolism*
25575784 Full text @ Arch. Biochem. Biophys.
The CBFβ gene encodes a transcription factor that, in combination with CBFα (also called Runx, runt-related transcription factor) regulates expression of several target genes. CBFβ interacts with all Runx family members, such as RUNX2, a regulator of bone-related gene transcription that contains a conserved DNA-binding domain. CBFβ stimulates DNA binding of the Runt domain, and is essential for most of the known functions of RUNX2. A comparative analysis of the zebrafish cbfβ gene and protein, and of its orthologous identified homologous proteins in different species indicates a highly conserved function. We cloned eleven zebrafish cbfβ gene transcripts, one resulting in the known Cbfβ protein (with 187 aa), and three additional variants resulting from skipping exon 5a (resulting in a protein with 174 aa) or exon 5b (resulting in a protein with 201 aa), both observed for the first time in zebrafish, and a completely novel isoform containing both exon 5a and 5b (resulting in a protein with 188 aa). Functional analysis of these isoforms provides insight into their role in regulating gene transcription. From the other variants two are premature termination Cbfβ forms, while the others show in-frame exon-skipping causing changes in the Cbfβ domain that may affect its function.
Genes / Markers
Show all Figures
Mutations / Transgenics
Human Disease / Model
Sequence Targeting Reagents
Engineered Foreign Genes