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Cloning, expression and characterization of the bovine p65 subunit of NFκB

Author:
Má  rton Doleschall, Balá  zs Mayer, Judit Cervenak, Lá  szló   Cervenak , Imre Kacskovics  


Journal:
Developmental and Comparative Immunology


Issue Date:
2007


Abstract(summary):

The full length coding sequence of the cattle transcription factor p65 was isolated and cloned. The cloned bovine p65 was expressed in mammalian cells, and it induced the NF-kappaB-specific luciferase reporter gene expression. Using gel retardation techniques, we demonstrated that the cloned bovine p65 bound to the consensus kappaB sequence. The comparison of the bovine p65 with its human and mouse orthologues at amino acid level showed high homology in both the DNA-binding domain, known as Rel homology domain (RHD) and the transactivation domain (TAD). The phylogenetic analysis at DNA level provided a new insight in the evolution of the NF-kappaB family, and it could resolve the topology of the mammalian p65 molecules. Although, the RHD was conserved in vertebrates, the TAD sequences deviated from each other, and showed faster molecular evolution than RHD sequences, which may indirectly result in the modification of NF-kappaB immune functions.


Page:
945-961


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