IthaID: 2183

Names and Sequences

Functionality: Globin gene causative mutation Pathogenicity: Variant of Uncertain Significance
Common Name: IVS II-781 C>G HGVS Name: HBB:c.316-70C>G
Hb Name: N/A Protein Info: β nt 1276 C>G

Context nucleotide sequence:

Also known as:

Comments: In the first report described as a β+ variant in a case with heterozygosity with the Hb A2’, HBD:c.49G>C [IthaID:1356], presented with elevated HbA2 4.4% but normal haematological indices. Furthermore, found in coinheritance with other α-, β- or δ-globin gene defects, shown no influence or change of this sequence variant on the expected hematological and clinical indices as simple carrier. The HBB:c.316-70C>G, was associated with Hb A2’ in most cases, suggesting that these two mutations are in linkage.


Hemoglobinopathy Group: Thalassaemia
Hemoglobinopathy Subgroup: β-thalassaemia
Allele Phenotype:Unclear
Associated Phenotypes: Haemolytic anaemia [HP:0001878]
Ineffective erythropoiesis [HP:0010972]


Chromosome: 11
Locus: NG_000007.3
Locus Location: 71820
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: African
Molecular mechanism: N/A
Inheritance: Recessive
DNA Sequence Determined: Yes

In silico pathogenicity prediction

Sequence Viewer

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Publications / Origin

  1. Henderson SJ, Timbs AT, McCarthy J, Gallienne AE, Proven M, Rugless MJ, Lopez H, Eglinton J, Dziedzic D, Beardsall M, Khalil MS, Old JM, Ten Years of Routine α- and β-Globin Gene Sequencing in UK Hemoglobinopathy Referrals Reveals 60 Novel Mutations., Hemoglobin , 40(2), 75-84, 2016 PubMed
  2. Vinciguerra M, Passarello C, Leto F, Crivello A, Fustaneo M, Cassarà F, Cannata M, Maggio A, Giambona A, Coinheritance of a Rare Nucleotide Substitution on the β-Globin Gene and Other Known Mutations in the Globin Clusters: Management in Genetic Counseling., Hemoglobin, 40(4), 231-5, 2016 PubMed
  3. Grimholt RM, Harteveld CL, Arkesteijn SGJ, Fjeld B, Klingenberg O, Characterization of Two Deep Intronic Variants on the β-Globin Gene with Inconsistent Interpretations of Clinical Significance., Hemoglobin, 42(2), 126-128, 2018 PubMed
Created on 2013-09-30 16:20:59, Last reviewed on 2022-02-17 21:40:35 (Show full history)

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