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[Study on the molecular genetics basis for one para-Bombay phenotype]
Xiao-Zhen Hong1, Xiao-Chun Shao, Xian-Guo Xu
1Insititute of Blood Transfusion, Blood Center of Zheijiang Province, Hangzhou 310006, China.
Zhongguo Shi Yan Xue Ye Xue Za Zhi
|January 13, 2006
Summary
Para-Bombay phenotype is caused by compound heterozygous mutations in the FUT1 gene. These genetic variations, including a novel missense mutation and a deletion, alter fucosyltransferase activity, explaining the rare blood group.
Area of Science:
- Genetics
- Molecular Biology
- Immunology
Background:
- The para-Bombay phenotype is a rare blood group variant.
- Understanding its molecular basis is crucial for transfusion medicine and genetic studies.
Observation:
- Standard serological techniques characterized the proband's red blood cell phenotype.
- Genomic DNA analysis identified mutations in the ABO, FUT1, and FUT2 genes.
Findings:
- The proband's ABO genotype was A(102)A(102).
- Two heterozygous FUT1 mutations were detected: A682G missense and a 547-552 deletion.
- The FUT2 genotype was heterozygous for functional and weakly functional alleles.
Implications:
- Compound heterozygous mutations in FUT1 are identified as the molecular mechanism for this para-Bombay phenotype.
- These findings contribute to the understanding of blood group genetics.
- Accurate genetic diagnosis is vital for preventing transfusion reactions.