rs1554578304

Variant names:

• chr8-41725838-TG-T
• rs1554578304
• NM_000037.4:c.534delC

Variant summary

Our verdict is Pathogenic. The variant received 12 ACMG points: 12P and 0B. PVS1 PM2 PP5_Moderate

The NM_000037.4(ANK1):​c.534delC​(p.His178GlnfsTer75) variant causes a frameshift change. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Pathogenic (★). Variant results in nonsense mediated mRNA decay.

• Frequency: Genomes: not found (cov: 32)
• Consequence: ANK1 NM_000037.4 frameshift
• Clinical Significance: Pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: 6.93
• Publications: 1 publications found

Genes affected

ANK1 (HGNC:492): (ankyrin 1) Ankyrins are a family of proteins that link the integral membrane proteins to the underlying spectrin-actin cytoskeleton and play key roles in activities such as cell motility, activation, proliferation, contact and the maintenance of specialized membrane domains. Multiple isoforms of ankyrin with different affinities for various target proteins are expressed in a tissue-specific, developmentally regulated manner. Most ankyrins are typically composed of three structural domains: an amino-terminal domain containing multiple ankyrin repeats; a central region with a highly conserved spectrin binding domain; and a carboxy-terminal regulatory domain which is the least conserved and subject to variation. Ankyrin 1, the prototype of this family, was first discovered in the erythrocytes, but since has also been found in brain and muscles. Mutations in erythrocytic ankyrin 1 have been associated in approximately half of all patients with hereditary spherocytosis. Complex patterns of alternative splicing in the regulatory domain, giving rise to different isoforms of ankyrin 1 have been described. Truncated muscle-specific isoforms of ankyrin 1 resulting from usage of an alternate promoter have also been identified. [provided by RefSeq, Dec 2008]

ANK1 Gene-Disease associations (from GenCC):

• hereditary spherocytosis

  Inheritance: AR, AD Classification: DEFINITIVE, SUPPORTIVE, LIMITED Submitted by: ClinGen, Orphanet
• hereditary spherocytosis type 1

  Inheritance: AR, AD Classification: STRONG, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics, Laboratory for Molecular Medicine

ACMG classification

Our verdict: Pathogenic. The variant received 12 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 8-41725838-TG-T is Pathogenic according to our data. Variant chr8-41725838-TG-T is described in ClinVar as Pathogenic. ClinVar VariationId is 544804.Status of the report is criteria_provided_single_submitter, 1 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000037.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ANK1	NM_000037.4	MANE Select	c.534delC	p.His178GlnfsTer75	frameshift	Exon 6 of 43	NP_000028.3
	ANK1	NM_001142446.2		c.633delC	p.His211GlnfsTer75	frameshift	Exon 6 of 43	NP_001135918.1
	ANK1	NM_020476.3		c.534delC	p.His178GlnfsTer75	frameshift	Exon 6 of 42	NP_065209.2

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ANK1	ENST00000289734.13	TSL:1 MANE Select	c.534delC	p.His178GlnfsTer75	frameshift	Exon 6 of 43	ENSP00000289734.8
	ANK1	ENST00000265709.14	TSL:1	c.633delC	p.His211GlnfsTer75	frameshift	Exon 6 of 43	ENSP00000265709.8
	ANK1	ENST00000347528.8	TSL:1	c.534delC	p.His178GlnfsTer75	frameshift	Exon 6 of 42	ENSP00000339620.4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

Submissions by phenotype

Hereditary spherocytosis type 1 Pathogenic:1

Feb 27, 2018

Department of Genetic, Henri Mondor Hospital, Assistance Publique des Hôpitaux de Paris

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		6.9
Mutation Taster		=0/200	disease causing (ClinVar)

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.0		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs1554578304; hg19: chr8-41583356;