IthaID: 3725

Names and Sequences

Functionality: Globin gene causative mutation Pathogenicity: Benign / Likely Benign
Common Name: -4 G>C HGVS Name: HBA2:c.-41C>G
Hb Name: N/A Protein Info: N/A

Context nucleotide sequence:

Also known as:

Comments: Found in three unrelated cases (Malay and Indian) presented clinically normal with mild low MCV and MCH and normal HbA2 level. GAP-PCR showed presence of two abnormal bands around 3.7 gene deletion in 2 cases. Recently, the substitution reported in a 17-year old male with Hb 14.4 g/dL, MCV 77.2 fL, MCH 24.2 pg, RBC 5.96 10^12/L and RDW 13.2 % with normal HbA2 value. GAP-PCR showed presence of two abnormal bands around 3.7 gene deletion. Molecular analysis showed the substitution C>G at both HbA1 and HbA2 regions.

External Links


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


Chromosome: 16
Locus: NG_000006.1
Locus Location: 33735
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: Malay, Indian
Molecular mechanism: N/A
Inheritance: Recessive
DNA Sequence Determined: Yes

In silico pathogenicity prediction

Sequence Viewer

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Publications / Origin

To the best of our knowledge, this is unpublished data. Please use with caution!


1Mohd Yasin, Norafiza 2020-11-24First report.
Created on 2021-02-09 08:37:40, Last reviewed on 2021-12-17 09:58:24 (Show full history)

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