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Insertion of common mutations into the human beta-globin locus using GET Recombination and an EcoRI endonuclease counterselection cassette
- Source :
- Journal of biotechnology. 101(1)
- Publication Year :
- 2003
-
Abstract
- A large number of mutations have been described in the human β-globin locus causing thalassemia or various hemoglobinopathies. However, only a very limited number of these mutations have been studied in animal model systems in the context of the human β-globin locus. We report here the use of the GET Recombination system with an Eco RI/Kan R counterselection cassette to facilitate the introduction of the HbE (codon 26, GAG→AAG mutation and the codon 41–42 (-TTCT) deletion, two mutations found in high frequency in South-East Asia, into the human β-globin locus. The counterselection cassette was first inserted into the target sequence in the β-globin gene, and then a PCR fragment carrying the required modification was used to replace it. Efficient counterselection depends upon the tight regulation of the highly toxic Eco RI endonuclease gene by expression of lacI q . Induction by IPTG during counterselection efficiently eliminates non-recombinant bacterial clones. The technique can be performed on any known gene sequence using current BAC technology, allowing identification and comparative functional analysis of key regulatory elements, and the development of accurate animal models for human genetic disorders.
- Subjects :
- Chromosomes, Artificial, Bacterial
Recombinant Fusion Proteins
EcoRI
Beta-Globulins
lac operon
Bioengineering
Locus (genetics)
Lac repressor
Protein Engineering
Applied Microbiology and Biotechnology
Deoxyribonuclease EcoRI
Endonuclease
Human β-globin locus
Escherichia coli
Humans
Cloning, Molecular
Gene
Cells, Cultured
Genetics
Recombination, Genetic
biology
General Medicine
Gene Expression Regulation, Bacterial
Mutagenesis, Insertional
biology.protein
Mutagenesis, Site-Directed
Recombination
Biotechnology
Subjects
Details
- ISSN :
- 01681656
- Volume :
- 101
- Issue :
- 1
- Database :
- OpenAIRE
- Journal :
- Journal of biotechnology
- Accession number :
- edsair.doi.dedup.....ab1911340bccbd2e882f342b17b2b68a