title: [Construction of bromodomain-deleted BRD7 mutation vector based on homologous recombination and reverse PCR amplification].
abstract: OBJECTIVE
  To construct a eukaryotic expression vector of bromodomain-containing protein 7 (BRD7) with deletion of bromodomain (BRD7△brd) using the homologous recombination and reverse PCR amplification techniques.
  
  
  METHODS
  The linear DNA fragments of bromodomain-deleted mutation of BRD7 (pIRES2-EGFP- 3Flag/BRD7△brd) were amplified by one pair of reverse PCR primers using high-fidelity enzyme, and then these fragments were transformed into E.coli to obtain the eukaryotic expression vector expressing BRD7△brd protein based on homologous recombination and plasmid cyclization.
  
  
  RESULTS
  Bromodomain-deleted clones were identified by digestion with restrictive enzymes, and then the sequence and protein expression were further confirmed by sequencing and Western blot assays. The results suggest that pIRES2-EGFP-3Flag/BRD7△brd was successfully constructed.
  
  
  CONCLUSIONS
  We establish a simple and quick method to construct plasmids with pIRES2-EGFP- 3Flag/BRD7△brd using reverse PCR amplification and homologous recombination techniques. We also found that the concentration of template in PCR reaction system is one of the critical factors that affect the rate of homologous recombination. Of all, this improved technique could be widely used in the construction of gene mutations.
authors.affiliation: Cancer Research Institute, Central South University, Changsha 410078, China.
authors.forename: Weihong
authors.initials: W
authors.lastname: Niu
authors.affiliation: Cancer Research Institute, Central South University, Changsha 410078, China.
authors.forename: Xinye
authors.initials: X
authors.lastname: Wang
authors.affiliation: Cancer Research Institute, Central South University, Changsha 410078, China.
authors.forename: Yao
authors.initials: Y
authors.lastname: Zhou
authors.affiliation: Department of Gastroenterology, Th ird Xiangya Hospital, Central South University, Changsha 410013, China.
authors.forename: Xiayu
authors.initials: X
authors.lastname: Li
authors.affiliation: Cancer Research Institute, Central South University, Changsha 410078, China.
authors.forename: Guiyuan
authors.initials: G
authors.lastname: Li
authors.affiliation: Cancer Research Institute, Central South University, Changsha 410078, China.
authors.forename: Ming
authors.initials: M
authors.lastname: Zhou
mesh_terms: D002868:Chromosomal Proteins, Non-Histone / Q000235:genetics; D004926:Escherichia coli / Q000235:genetics; D059765:Homologous Recombination; D006801:Humans; D009154:Mutation; D010957:Plasmids; D016133:Polymerase Chain Reaction / Q000379:methods*; D017384:Sequence Deletion; D014162:Transfection / Q000379:methods; D000092468:Bromodomain Containing Proteins
chemical_list: D002868:Chromosomal Proteins, Non-Histone; C485694:BRD7 protein, human; D000092468:Bromodomain Containing Proteins