Related Experiment Video
Updated: Feb 3, 2026

12:04
Engineering Oncogenic Heterozygous Gain-of-Function Mutations in Human Hematopoietic Stem and Progenitor Cells
Published on: March 10, 2023
4.9K
Heterozygous FUT1 Mutations Causing a Para-Bombay Phenotype
Clinical Laboratory
|October 19, 2018
Summary
This study identifies compound heterozygous mutations in the FUT1 gene causing the rare para-Bombay A phenotype. These findings highlight common FUT1 mutations in the Taiwanese population.
Area of Science:
- Genetics
- Immunology
- Hematology
Background:
- The para-Bombay phenotype is a rare blood group variant.
- It is characterized by weakened expression of H antigen and normal or weakened expression of A or B antigens.
- This phenotype results from mutations in the FUT1 gene.
Observation:
- A patient presented with the para-Bombay A phenotype.
- Agglutination tests revealed the presence of A and H antigens in saliva.
- ABO gene sequencing showed an A1v/O1v genotype.
Findings:
- The patient had compound heterozygous mutations in the FUT1 gene: c.881_882delTT (p.Phe294Cysfs) and c.551_552delAG (p.Glu184Valfs).
- These mutations lead to the para-Bombay phenotype.
- The FUT1 mutations 547delAG/880delTT are common in Taiwanese individuals.
Implications:
- Understanding FUT1 mutations is crucial for accurate blood transfusion practices.
- This research contributes to the genetic understanding of blood group phenotypes.
- Identifies prevalent FUT1 mutations in a specific ethnic group for further research.
Related Concept Videos
Mutations
94.5K
Overview
94.5K
Mutations
44.5K
Mutations are changes in the sequence of DNA. These changes can occur spontaneously or they can be induced by exposure to environmental factors. Mutations can be characterized in a number of different ways: whether and how they alter the amino acid sequence of the protein, whether they occur over a small or large area of DNA, and whether they occur in somatic cells or germline cells.
Chromosomal Alterations Are Large-Scale Mutations
While point mutations are changes in a single nucleotide in...
Chromosomal Alterations Are Large-Scale Mutations
While point mutations are changes in a single nucleotide in...
44.5K
Viral Mutations
39.9K
A mutation is a change in the sequence of bases of DNA or RNA in a genome. Some mutations occur during replication of the genome due to errors made by the polymerase enzymes that replicate DNA or RNA. Unlike DNA polymerase, RNA polymerase is prone to errors because it is not capable of “proofreading” its work. Viruses with RNA-based genomes, like HIV, therefore accrue mutations faster than viruses with DNA-based genomes. Because mutation and recombination provide the raw material...
39.9K
Directing Effect of Substituents: ortho–para-Directing Groups
8.5K
Ortho–para directors are substituent groups attached to the benzene ring and direct the addition of an electrophile to the positions ortho or para to the substituent. All electron-donating groups are considered ortho–para directors. They donate electrons to the ring and make the ring more electron-rich. The ring is therefore susceptible to the addition of electrophiles. Substituents such as amino, hydroxy, or alkoxy, containing lone pairs on the atom adjacent to the ring, donate...
8.5K
ortho–para-Directing Deactivators: Halogens
6.8K
Halogens are ortho–para directors. They are more electronegative than carbon. Therefore, as ring substituents, they can withdraw electrons through the inductive effect and deactivate the aromatic ring towards electrophilic substitution. Halogens also have an electron-donating resonance effect on the ring, which influences the orientation of the incoming electrophile. If an electrophile attacks at the ortho or the para position, the halogen donates electrons and stabilizes the intermediate...
6.8K
Mutation, Gene Flow, and Genetic Drift
64.3K
In a population that is not at Hardy-Weinberg equilibrium, the frequency of alleles changes over time. Therefore, any deviations from the five conditions of Hardy-Weinberg equilibrium can alter the genetic variation of a given population. Conditions that change the genetic variability of a population include mutations, natural selection, non-random mating, gene flow, and genetic drift (small population size).
64.3K

