17-44258576-C-T

Position:

chr17-44258576-C-T

Variant summary

Our verdict is Benign. Variant got -21 ACMG points: 0P and 21B. BP4_StrongBP6_Very_StrongBP7BA1

The NM_000342.4(SLC4A1):c.924G>A(p.Leu308=) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00289 in 1,612,792 control chromosomes in the GnomAD database, including 132 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

Frequency

Genomes: 𝑓 0.016 ( 71 hom., cov: 31)

Exomes 𝑓: 0.0016 ( 61 hom. )

Consequence

SLC4A1
NM_000342.4 synonymous

Scores

Clinical Significance

Benign criteria provided, multiple submitters, no conflicts B:7

Conservation

PhyloP100: -0.924

Variant links:

Genes affected

SLC4A1 (HGNC:11027): (solute carrier family 4 member 1 (Diego blood group)) The protein encoded by this gene is part of the anion exchanger (AE) family and is expressed in the erythrocyte plasma membrane, where it functions as a chloride/bicarbonate exchanger involved in carbon dioxide transport from tissues to lungs. The protein comprises two domains that are structurally and functionally distinct. The N-terminal 40kDa domain is located in the cytoplasm and acts as an attachment site for the red cell skeleton by binding ankyrin. The glycosylated C-terminal membrane-associated domain contains 12-14 membrane spanning segments and carries out the stilbene disulphonate-sensitive exchange transport of anions. The cytoplasmic tail at the extreme C-terminus of the membrane domain binds carbonic anhydrase II. The encoded protein associates with the red cell membrane protein glycophorin A and this association promotes the correct folding and translocation of the exchanger. This protein is predominantly dimeric but forms tetramers in the presence of ankyrin. Many mutations in this gene are known in man, and these mutations can lead to two types of disease: destabilization of red cell membrane leading to hereditary spherocytosis, and defective kidney acid secretion leading to distal renal tubular acidosis. Other mutations that do not give rise to disease result in novel blood group antigens, which form the Diego blood group system. Southeast Asian ovalocytosis (SAO, Melanesian ovalocytosis) results from the heterozygous presence of a deletion in the encoded protein and is common in areas where Plasmodium falciparum malaria is endemic. One null mutation in this gene is known, resulting in very severe anemia and nephrocalcinosis. [provided by RefSeq, Jul 2008]

SLC4A1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -21 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.81).

BP6

Variant 17-44258576-C-T is Benign according to our data. Variant chr17-44258576-C-T is described in ClinVar as [Benign]. Clinvar id is 255915.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BP7

Synonymous conserved (PhyloP=-0.924 with no splicing effect.

BA1

GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.0525 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
SLC4A1	NM_000342.4 linkuse as main transcript	c.924G>A	p.Leu308=	synonymous_variant	10/20	ENST00000262418.12
SLC4A1	XM_011525129.3 linkuse as main transcript	c.924G>A	p.Leu308=	synonymous_variant	10/19
SLC4A1	XM_005257593.6 linkuse as main transcript	c.729G>A	p.Leu243=	synonymous_variant	8/18
SLC4A1	XM_011525130.2 linkuse as main transcript	c.924G>A	p.Leu308=	synonymous_variant	10/18

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SLC4A1	ENST00000262418.12 linkuse as main transcript	c.924G>A	p.Leu308=	synonymous_variant	10/20	1	NM_000342.4	P1	P02730-1
SLC4A1	ENST00000399246.3 linkuse as main transcript	c.777+686G>A		intron_variant		5

Frequencies

GnomAD3 genomes

AF:

0.0157

AC:

2390

AN:

152076

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0546

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00543

Gnomad ASJ

AF:

0.00115

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000176

Gnomad OTH

AF:

0.0153

GnomAD3 exomes

AF:

0.00396

AC:

981

AN:

247590

Hom.:

AF XY:

0.00278

AC XY:

373

AN XY:

134140

show subpopulations

Gnomad AFR exome

AF:

0.0544

Gnomad AMR exome

AF:

0.00263

Gnomad ASJ exome

AF:

0.000301

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000328

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000540

Gnomad OTH exome

AF:

0.00165

GnomAD4 exome

AF:

0.00156

AC:

2280

AN:

1460598

Hom.:

Cov.:

AF XY:

0.00134

AC XY:

973

AN XY:

726608

show subpopulations

Gnomad4 AFR exome

AF:

0.0569

Gnomad4 AMR exome

AF:

0.00287

Gnomad4 ASJ exome

AF:

0.000268

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000580

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000459

Gnomad4 OTH exome

AF:

0.00292

GnomAD4 genome

AF:

0.0157

AC:

2389

AN:

152194

Hom.:

Cov.:

AF XY:

0.0153

AC XY:

1139

AN XY:

74404

show subpopulations

Gnomad4 AFR

AF:

0.0544

Gnomad4 AMR

AF:

0.00542

Gnomad4 ASJ

AF:

0.00115

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000177

Gnomad4 OTH

AF:

0.0152

Alfa

AF:

0.00818

Hom.:

Bravo

AF:

0.0178

Asia WGS

AF:

0.00202

AC:

AN:

3478

ClinVar

Significance: Benign

Submissions summary: Benign:7

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:3

Benign, criteria provided, single submitter	clinical testing	Invitae	Jan 29, 2024	- -
Benign, criteria provided, single submitter	clinical testing	ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories	Oct 27, 2023	- -
Benign, criteria provided, single submitter	clinical testing	GeneDx	Apr 17, 2021	- -

Autosomal dominant distal renal tubular acidosis

Benign:1

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. -

not specified

Benign:1

Benign, criteria provided, single submitter

clinical testing

PreventionGenetics, part of Exact Sciences

- -

Hereditary spherocytosis type 4

Benign:1

Benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 12, 2018

Hemolytic anemia

Benign:1

Benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 12, 2018

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.81

CADD

Benign

1.1

DANN

Benign

0.42

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

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