1-158686491-T-C

Position:

chr1-158686491-T-C

Variant summary

Our verdict is Benign. Variant got -18 ACMG points: 0P and 18B. BP4_ModerateBP6_Very_StrongBA1

The NM_003126.4(SPTA1):c.24+3A>G variant causes a splice region, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.995 in 1,589,362 control chromosomes in the GnomAD database, including 787,145 homozygotes. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Benign (★★).

Frequency

Genomes: 𝑓 0.97 ( 72249 hom., cov: 32)

Exomes 𝑓: 1.0 ( 714896 hom. )

Consequence

SPTA1
NM_003126.4 splice_region, intron

Scores

Splicing: ADA: 0.001238

Clinical Significance

Benign criteria provided, multiple submitters, no conflicts B:12

Conservation

PhyloP100: 0.454

Variant links:

Genes affected

SPTA1 (HGNC:11272): (spectrin alpha, erythrocytic 1) This gene encodes a member of a family of molecular scaffold proteins that link the plasma membrane to the actin cytoskeleton and functions in the determination of cell shape, arrangement of transmembrane proteins, and organization of organelles. The encoded protein is primarily composed of 22 spectrin repeats which are involved in dimer formation. It forms a component of the erythrocyte plasma membrane. Mutations in this gene result in a variety of hereditary red blood cell disorders, including elliptocytosis-2, pyropoikilocytosis, and spherocytosis, type 3. [provided by RefSeq, Aug 2017]

SPTA1 links:

SPTA1 (HGNC:):

SPTA1 links:

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ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -18 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.36).

BP6

Variant 1-158686491-T-C is Benign according to our data. Variant chr1-158686491-T-C is described in ClinVar as [Benign]. Clinvar id is 258920.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr1-158686491-T-C is described in Lovd as [Benign].

BA1

GnomAd4 highest subpopulation (EAS) allele frequency at 95% confidence interval = 0.994 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
SPTA1	NM_003126.4 linkuse as main transcript	c.24+3A>G		splice_region_variant, intron_variant		ENST00000643759.2	NP_003117.2	P02549-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
SPTA1	ENST00000643759.2 linkuse as main transcript	c.24+3A>G		splice_region_variant, intron_variant			NM_003126.4	ENSP00000495214.1		P02549-1

Frequencies

GnomAD3 genomes

AF:

0.974

AC:

148060

AN:

152048

Hom.:

72195

Cov.:

show subpopulations

Gnomad AFR

AF:

0.909

Gnomad AMI

AF:

1.00

Gnomad AMR

AF:

0.989

Gnomad ASJ

AF:

1.00

Gnomad EAS

AF:

1.00

Gnomad SAS

AF:

0.999

Gnomad FIN

AF:

1.00

Gnomad MID

AF:

0.997

Gnomad NFE

AF:

1.00

Gnomad OTH

AF:

0.977

GnomAD3 exomes

AF:

0.993

AC:

247474

AN:

249186

Hom.:

122938

AF XY:

0.995

AC XY:

134536

AN XY:

135242

show subpopulations

Gnomad AFR exome

AF:

0.905

Gnomad AMR exome

AF:

0.995

Gnomad ASJ exome

AF:

1.00

Gnomad EAS exome

AF:

1.00

Gnomad SAS exome

AF:

1.00

Gnomad FIN exome

AF:

1.00

Gnomad NFE exome

AF:

1.00

Gnomad OTH exome

AF:

0.997

GnomAD4 exome

AF:

0.997

AC:

1433334

AN:

1437196

Hom.:

714896

Cov.:

AF XY:

0.998

AC XY:

714922

AN XY:

716616

show subpopulations

Gnomad4 AFR exome

AF:

0.909

Gnomad4 AMR exome

AF:

0.994

Gnomad4 ASJ exome

AF:

1.00

Gnomad4 EAS exome

AF:

1.00

Gnomad4 SAS exome

AF:

1.00

Gnomad4 FIN exome

AF:

1.00

Gnomad4 NFE exome

AF:

1.00

Gnomad4 OTH exome

AF:

0.993

GnomAD4 genome

AF:

0.974

AC:

148171

AN:

152166

Hom.:

72249

Cov.:

AF XY:

0.975

AC XY:

72533

AN XY:

74386

show subpopulations

Gnomad4 AFR

AF:

0.910

Gnomad4 AMR

AF:

0.989

Gnomad4 ASJ

AF:

1.00

Gnomad4 EAS

AF:

1.00

Gnomad4 SAS

AF:

0.999

Gnomad4 FIN

AF:

1.00

Gnomad4 NFE

AF:

1.00

Gnomad4 OTH

AF:

0.978

Alfa

AF:

0.988

Hom.:

41782

Bravo

AF:

0.970

Asia WGS

AF:

0.995

AC:

3460

AN:

3476

EpiCase

AF:

1.00

EpiControl

AF:

1.00

ClinVar

Significance: Benign

Submissions summary: Benign:12

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:3

Benign, no assertion criteria provided	clinical testing	Genome Diagnostics Laboratory, University Medical Center Utrecht	-	- -
Benign, criteria provided, single submitter	clinical testing	PreventionGenetics, part of Exact Sciences	-	- -
Benign, no assertion criteria provided	clinical testing	Diagnostic Laboratory, Department of Genetics, University Medical Center Groningen	-	- -

not provided

Benign:3

Benign, criteria provided, single submitter	not provided	Breakthrough Genomics, Breakthrough Genomics	-	- -
Benign, criteria provided, single submitter	clinical testing	ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories	Nov 30, 2023	- -
Benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jan 29, 2024	- -

Elliptocytosis 2

Benign:2

Benign, criteria provided, single submitter	clinical testing	Illumina Laboratory Services, Illumina	Jan 12, 2018	This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -
Benign, criteria provided, single submitter	clinical testing	Genome-Nilou Lab	Jul 15, 2021	- -

Hereditary spherocytosis type 3

Benign:2

Benign, criteria provided, single submitter	clinical testing	Illumina Laboratory Services, Illumina	Jan 12, 2018	This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -
Benign, criteria provided, single submitter	clinical testing	Genome-Nilou Lab	Jul 15, 2021	- -

Pyropoikilocytosis, hereditary

Benign:2

Benign, criteria provided, single submitter	clinical testing	Genome-Nilou Lab	Jul 15, 2021	- -
Benign, criteria provided, single submitter	clinical testing	Illumina Laboratory Services, Illumina	Jan 12, 2018	This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.36

CADD

Benign

DANN

Benign

0.82

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.0012

dbscSNV1_RF

Benign

0.050

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

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over