IthaID: 2988
Names and Sequences
| Functionality: | Globin gene causative mutation | Pathogenicity: | Pathogenic / Likely Pathogenic |
|---|---|---|---|
| Common Name: | -54 G>A | HGVS Name: | HBA2:c.-91G>A |
| Hb Name: | N/A | Protein Info: | α2 nt -54 G>A |
Context nucleotide sequence:
CGCGCCAGCCAATGAGCGCCGCCCG [G>A] CCGGGCGTGCCCCCGCGCCCCAAGC (Strand: +)
Also known as:
Comments: Found as a heterozygote with mild microcytosis. Point-mutation located at the proximal promoter region between two regulatory motifs recognised by the transcription factors Sp1 (Specificity Protein 1) and α-IRP (α-inverted repeat protein). Functional studies showed that it can cause up to 36% reduction in the transcriptional activity.
We follow the HGVS sequence variant nomenclature and IUPAC standards.
External Links
Phenotype
| Hemoglobinopathy Group: | Thalassaemia |
|---|---|
| Hemoglobinopathy Subgroup: | α-thalassaemia |
| Allele Phenotype: | N/A |
| Associated Phenotypes: | N/A |
Location
| Chromosome: | 16 |
|---|---|
| Locus: | NG_000006.1 |
| Locus Location: | 33685 |
| Size: | 1 bp |
| Located at: | α2 |
| Specific Location: | Promoter |
Other details
| Type of Mutation: | Point-Mutation(Substitution) |
|---|---|
| Effect on Gene/Protein Function: | Promoter (Transcription) |
| Ethnic Origin: | N/A |
| Molecular mechanism: | N/A |
| Inheritance: | Recessive |
| DNA Sequence Determined: | Yes |
In silico pathogenicity prediction
Publications / Origin
- Qadah T, Finlayson J, Dennis M, Ghassemifar R, Molecular and cellular analysis of three novel alpha2-globin gene promoter mutations [HBA2: c.-59C>T], [HBA2: c.-81C>A] and [HBA2: c.-91G>A] reveal varying patterns of transcriptional and translational activities., Pathology , 46(1), 46-52, 2014
Created on 2016-08-23 17:11:10,
Last reviewed on 2017-07-31 12:12:32 (Show full history)
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