[Screening of polypeptides interacting with Rel homology domain of NF-kappaB p50 subunit].

Aim: To obtain the polypeptides interacting with NF-kappaB p50 Rel homology domain (RHD) by yeast two-hybrid technique.

Methods: Using NF-kappaB p50 RHD as bait, the polypeptides interacting with NF-kappaB p50 RHD were screened from a 16-peptide cDNA library by yeast two-hybrid technique. The false positive clones were screened out but the positive clone were identified by beta-GAL assay, yeast mating, and one to one yeast two-hybrid method.

Results: 8 positive clones were obtained. The gene sequences of the eight polypeptides were different from each other and their homologous proteins were not found in GenBank.

Conclusion: 8 novel polypeptides interacting with NF-kappaB p50 RHD were obtained, but their functions need to be validated in further experiments.