IthaID: 1319

Names and Sequences

Functionality: Globin gene causative mutation Pathogenicity: Pathogenic / Likely Pathogenic
Common Name: CD 146/147 (+AC) HGVS Name: HBB:c.440_441dupAC
Hb Name: Hb Tak Protein Info: β 147(+AC); modified C-terminal sequence: (147)Thr-Lys-Leu- Ala-Phe-Leu-Leu-Ser-Asn-Phe-(157)Tyr-COOH

Context nucleotide sequence:

Also known as:

Comments: Insertion of dinucleotide AC between codon 146 and nonsense codon 147 (TAA), causing the elongation of the β-chain by 11 amino acid residues at its C-terminus. The resulting haemoglobin Tak has high oxygen affinity, causing secondary polycythemia.

External Links


Hemoglobinopathy Group: Structural Haemoglobinopathy
Hemoglobinopathy Subgroup: β-chain variant
Allele Phenotype:N/A
Stability: Unstable
Oxygen Affinity: Increased Oxygen Affinity
Associated Phenotypes: N/A


Chromosome: 11
Locus: NG_000007.3
Locus Location: 72014
Size: 2 bp
Located at: β
Specific Location: Exon 3

Other details

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

Sequence Viewer

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Publications / Origin

  1. Hoyer JD, Wick MJ, Thibodeau SN, Viker KA, Conner R, Fairbanks VF, Hb Tak confirmed by DNA analysis: not expressed as thalassemia in a Hb Tak/Hb E compound heterozygote., Hemoglobin, 22(1), 45-52, 1998 PubMed
Created on 2010-06-16 16:13:17, Last reviewed on 2019-11-12 16:35:03 (Show full history)

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