IthaID: 107

Names and Sequences

Functionality: Globin gene causative mutation Pathogenicity: Pathogenic / Likely Pathogenic
Common Name: IVS I-5 (G>C) HGVS Name: HBB:c.92+5G>C
Hb Name: N/A Protein Info: β nt 147 G>C

Context nucleotide sequence:

Also known as:

Comments: The G>C substitution at the 5th base of IVS 1 disrupts normal splicing. The variant activates three cryptic donor sites that lead to the production of three different abnormally spliced RNAs. The normally spliced RNA is also produced (in vitro experiments).

We follow the HGVS sequence variant nomenclature and IUPAC standards.


Hemoglobinopathy Group: Thalassaemia
Hemoglobinopathy Subgroup: β-thalassaemia
Allele Phenotype:β0
Associated Phenotypes: Haemolytic anaemia [HP:0001878]
Ineffective erythropoiesis [HP:0010972]


Chromosome: 11
Locus: NG_000007.3
Locus Location: 70691
Size: 1 bp
Located at: β
Specific Location: Intron 1

Other details

Type of Mutation: Point-Mutation(Substitution)
Effect on Gene/Protein Function: Consensus splice site (mRNA Processing)
Ethnic Origin: Asian Indian, SE Asian, Melanesian, Pakistani
Molecular mechanism: N/A
Inheritance: Recessive
DNA Sequence Determined: Yes

In silico pathogenicity prediction

Sequence Viewer

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Publications / Origin

  1. Treisman R, Orkin SH, Maniatis T, Specific transcription and RNA splicing defects in five cloned beta-thalassaemia genes., Nature, 302(5909), 591-6, 1983 PubMed
  2. Kazazian HH, Orkin SH, Antonarakis SE, Sexton JP, Boehm CD, Goff SC, Waber PG, Molecular characterization of seven beta-thalassemia mutations in Asian Indians., The EMBO journal, 3(3), 593-6, 1984 PubMed
  3. Hill AV, Bowden DK, O'Shaughnessy DF, Weatherall DJ, Clegg JB, Beta thalassemia in Melanesia: association with malaria and characterization of a common variant (IVS-1 nt 5 G----C)., Blood, 72(1), 9-14, 1988 PubMed
  4. Kulozik AE, Bail S, Kar BC, Serjeant BE, Serjeant GE, Sickle cell-beta+ thalassaemia in Orissa State, India., British journal of haematology, 77(2), 215-20, 1991 PubMed
  5. Divoky V, Bissé E, Wilson JB, Gu LH, Wieland H, Heinrichs I, Prior JF, Huisman TH, Heterozygosity for the IVS-I-5 (G-->C) mutation with a G-->A change at codon 18 (Val-->Met; Hb Baden) in cis and a T-->G mutation at codon 126 (Val-->Gly; Hb Dhonburi) in trans resulting in a thalassemia intermedia., Biochimica et biophysica acta, 1180(2), 173-9, 1992 PubMed
  6. Yasmeen H, Toma S, Killeen N, Hasnain S, Foroni L, The molecular characterization of Beta globin gene in thalassemia patients reveals rare and a novel mutations in Pakistani population., Eur J Med Genet , 59(8), 355-62, 2016 PubMed
Created on 2010-06-16 16:13:14, Last reviewed on 2022-03-04 09:49:23 (Show full history)

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