IthaID: 2569



Names and Sequences

Functionality: Disease modifying mutation Pathogenicity: N/A
Common Name: ααα(anti-4.2) HGVS Name: NG_000006.1:g.(31957_31978)_(34525_34544)dup

Also known as: Triplicated α (anti-4.2)

Comments: Alpha-globin gene triplications are not associated with abnormal haematological parameters but may aggravate the phenotype of patients with beta-thalassaemia. Reciprocal recombination between mispaired X boxes results in an allele with the -α4.2 (leftward deletion) [ithaID=301]and an ααα(anti-4.2) triplication allele. The PCR primers used by Wang et al [PMID: 14500599] place the triplicated allele between positions 171094-171115 (HBA2 upstream) and 173662-173681 (HBA2 3'UTR) (GRCh38.p12), producing an amplicon of around 1.7 kb.

We follow the HGVS sequence variant nomenclature and IUPAC standards.

External Links

No available links

Phenotype

Allele Phenotype (Cis):N/A
Allele Phenotype (Trans):N/A
Associated Phenotypes: Anaemia [HP:0001903]

Location

Chromosome: 16
Locus: NG_000006.1
Locus Location: N/A
Size: N/A
Located at: α2

Other details

Type of Mutation: Duplication
Ethnic Origin: N/A
Molecular mechanism: N/A
Inheritance: Recessive
DNA Sequence Determined: Yes

In silico pathogenicity prediction

Sequence Viewer

Note: The NCBI Sequence Viewer is not installed on the ITHANET servers but it is embedded in this page from the NCBI. Therefore, IthaGenes has no responsibility over any temporary unavailability of the service. In such a case, please Refresh the page or retry at a later stage. Otherwise, use this external link.

Publications / Origin

  1. Embury SH, Miller JA, Dozy AM, Kan YW, Chan V, Todd D, Two different molecular organizations account for the single alpha-globin gene of the alpha-thalassemia-2 genotype., The Journal of clinical investigation, 66(6), 1319-25, 1980 PubMed
  2. Trent RJ, Higgs DR, Clegg JB, Weatherall DJ, A new triplicated alpha-globin gene arrangement in man., Br. J. Haematol. , 49(1), 149-52, 1981 PubMed
  3. Wang W, Ma ES, Chan AY, Prior J, Erber WN, Chan LC, Chui DH, Chong SS, Single-tube multiplex-PCR screen for anti-3.7 and anti-4.2 alpha-globin gene triplications., Clin. Chem., 49(10), 1679-82, 2003 PubMed
Created on 2015-12-07 12:08:12, Last reviewed on 2022-05-18 09:45:18 (Show full history)

Disclaimer: The information on this website is provided as an information resource only and must not to be used as a substitute for professional diagnosis and treatment. The ITHANET Portal and IthaGenes are not responsible or liable for any advice, course of treatment, diagnosis or any other information, services or products that an individual obtains through this website.