ClinVar Miner

Submissions for variant NM_000558.5(HBA1):c.96-1G>A (rs34883113)

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Total submissions: 2
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Quest Diagnostics Nichols Institute San Juan Capistrano RCV000985716 SCV001134189 likely pathogenic not provided 2018-10-24 criteria provided, single submitter clinical testing The variant disrupts a canonical splice site, and is therefore predicted to significantly disrupt the protein structure. The best available variant frequency is uninformative because it is below the disease allele frequency. Found in at least one symptomatic patient. Occurs in multiple cases with a recessive pathogenic variant in the same gene.
ARUP Laboratories, Molecular Genetics and Genomics,ARUP Laboratories RCV001287651 SCV001474361 pathogenic none provided 2020-08-03 criteria provided, single submitter clinical testing The HBA1 c.96-1G>A variant (rs34883113), also known as alpha1 IVS-I-117 (G->A), has been reported in multiple individuals affected with alpha thalassemia minor, found in-trans with either an alpha globin deletion or homozygously (Curuk 1993, HbVar database). This variant is found in the South Asian population with an overall allele frequency of 0.10% (21/21318 alleles) in the Genome Aggregation Database. This variant abolishes the canonical splice acceptor site of intron 1, which is likely to disrupt gene function. Based on available information, this variant is considered to be pathogenic. References: Link to HbVar for alpha1 IVS-I-117 (G->A): Curuk M et al. An IVS-I-117 (G-->A) acceptor splice site mutation in the alpha 1-globin gene is a nondeletional alpha-thalassaemia-2 determinant in an Indian population. Br J Haematol. 1993; 85(1):148-52.

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