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J. Biol. Chem., Vol. 264, Issue 14, 7780-7783, May, 1989
S Fucharoen, G Fucharoen, P Fucharoen and Y Fukumaki
The beta-globin genes from a Thai patient compound heterozygous for
beta-thalassemia and HbE disease were investigated. The 3.0-kilobase
fragment containing the entire beta-globin gene was amplified by polymerase
chain reaction, using Taq DNA polymerase followed by direct cloning of the
amplified product into plasmid DNA. Sequence analysis of the thalassemia
gene revealed only one base change, a C-A transversion within codon for an
amino acid 35. This new mutation creates a premature terminator, TAA, an
ochre codon, and results in a beta 0- thalassemia phenotype. The same
result was obtained when this mutation was analyzed using a conventional
cloning technique, direct sequencing of the amplified product, and
hybridization with allele-specific oligonucleotide probes. No
misincorporation was detected in the sequence analysis of the 3.0-kilobase
insert of five clones of the amplified products obtained from genomic DNA
of a normal individual. This approach is a rapid and accurate method for
molecular cloning of the beta-globin gene and also other genes, the partial
nucleotide sequences of which are known.
A novel ochre mutation in the beta-thalassemia gene of a Thai. Identification by direct cloning of the entire beta-globin gene amplified using polymerase chain reactions
Research Laboratory for Genetic Information, Kyushu University, Fukuoka, Japan.
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