IthaID: 3558

Names and Sequences

Functionality: Globin gene causative mutation Pathogenicity: Pathogenic / Likely Pathogenic
Common Name: IVS II-821 (A>C) HGVS Name: HBB:c.316-30A>C
Hb Name: N/A Protein Info: N/A

Context nucleotide sequence:

Also known as:

Comments: There are conflicting interpretations of pathogenicity for this variant. Data from contributors shows that carriers presented with normal haematological indices and also that co-inheritance of IVS II-821 (A>C) with α-variants does not cause more severe clinical symptoms than expected. In contrast, the variant was found in a Kurdish family [PMID: 31146650] where three siblings were carriers and presented with low haematological indices and abnormal HbA2 (around 5%). The father and one sibling had no mutations in the β-globin gene. No maternal information was provided. Bioinformatics analysis showed that this variant may influence normal splicing process.

External Links


Hemoglobinopathy Group: Thalassaemia
Hemoglobinopathy Subgroup: β-thalassaemia
Allele Phenotype:N/A
Associated Phenotypes: N/A


Chromosome: 11
Locus: NG_000007.3
Locus Location: 71860
Size: 1 bp
Located at: β
Specific Location: Intron 2

Other details

Type of Mutation: Point-Mutation(Substitution)
Effect on Gene/Protein Function: N/A
Ethnic Origin: Kurdish, Cypriot
Molecular mechanism: N/A
Inheritance: Recessive
DNA Sequence Determined: Yes

In silico pathogenicity prediction

Sequence Viewer

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Publications / Origin

  1. Azimi A, Nejati P, Tahmasebi S, Alimoradi S, Alibakhshi R, Characterization of the IVS-II-821 (A>C) (: c.316-30A>C) Mutation in a β-Thalassemia Phenotype in Iran., Hemoglobin, 43(1), 23-26, 2019 PubMed
Created on 2020-01-17 11:28:40, Last reviewed on 2022-11-15 13:16:10 (Show full history)

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