rs28931584

Positions:

chr17-44257514-C-T

Variant summary

Our verdict is Pathogenic. Variant got 16 ACMG points: 16P and 0B. PM1PM2PP3_StrongPP5_Very_Strong

The NM_000342.4(SLC4A1):c.1462G>A(p.Val488Met) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000124 in 1,613,948 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★★).

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 31)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

SLC4A1
NM_000342.4 missense

Scores

Clinical Significance

Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:8

Conservation

PhyloP100: 2.23

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 Pathogenic. Variant got 16 ACMG points.

PM1

In a transmembrane_region Helical; Name=4 (size 20) in uniprot entity B3AT_HUMAN there are 5 pathogenic changes around while only 0 benign (100%) in NM_000342.4

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.973

PP5

Variant 17-44257514-C-T is Pathogenic according to our data. Variant chr17-44257514-C-T is described in ClinVar as [Likely_pathogenic]. Clinvar id is 17773.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
SLC4A1	NM_000342.4 linkuse as main transcript	c.1462G>A	p.Val488Met	missense_variant	13/20	ENST00000262418.12
SLC4A1	XM_011525129.3 linkuse as main transcript	c.1462G>A	p.Val488Met	missense_variant	13/19
SLC4A1	XM_005257593.6 linkuse as main transcript	c.1267G>A	p.Val423Met	missense_variant	11/18
SLC4A1	XM_011525130.2 linkuse as main transcript	c.1462G>A	p.Val488Met	missense_variant	13/18

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SLC4A1	ENST00000262418.12 linkuse as main transcript	c.1462G>A	p.Val488Met	missense_variant	13/20	1	NM_000342.4	P1	P02730-1
SLC4A1	ENST00000399246.3 linkuse as main transcript	c.777+1748G>A		intron_variant		5

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152100

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.0000943

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.00000398

AC:

AN:

251370

Hom.:

AF XY:

0.00

AC XY:

AN XY:

135878

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000879

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1461848

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

727222

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

8.99e-7

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152100

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74298

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.0000943

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:8

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Hereditary spherocytosis type 4

Pathogenic:3

Pathogenic, criteria provided, single submitter	research	HudsonAlpha Institute for Biotechnology, HudsonAlpha Institute for Biotechnology	Sep 15, 2016	- -
Pathogenic, no assertion criteria provided	literature only	OMIM	Aug 15, 2000	- -
Pathogenic, criteria provided, single submitter	clinical testing	Department of Genetic, Henri Mondor Hospital, Assistance Publique des Hôpitaux de Paris	Feb 27, 2018	- -

not provided

Pathogenic:3

Pathogenic, criteria provided, single submitter	clinical testing	Center for Genomic Medicine, Rigshospitalet, Copenhagen University Hospital	Aug 15, 2023	- -
Likely pathogenic, criteria provided, single submitter	clinical testing	Revvity Omics, Revvity	Sep 19, 2022	- -
Pathogenic, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Oct 25, 2023	This sequence change replaces valine, which is neutral and non-polar, with methionine, which is neutral and non-polar, at codon 488 of the SLC4A1 protein (p.Val488Met). The frequency data for this variant in the population databases is considered unreliable, as metrics indicate poor data quality at this position in the gnomAD database. This missense change has been observed in individual(s) with hereditary spherocytosis (PMID: 9207478, 10942416). It has also been observed to segregate with disease in related individuals. This variant is also known as allele Coimbra. ClinVar contains an entry for this variant (Variation ID: 17773). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is expected to disrupt SLC4A1 protein function with a positive predictive value of 80%. Experimental studies have shown that this missense change affects SLC4A1 function (PMID: 17215882). For these reasons, this variant has been classified as Pathogenic. -

Renal tubular acidosis, distal, 4, with hemolytic anemia

Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

OMIM

Aug 15, 2000

- -

BLOOD GROUP--DIEGO SYSTEM;C1832168:BLOOD GROUP--FROESE;C1832169:BLOOD GROUP--SWANN SYSTEM;C1861453:Cryohydrocytosis;C1862190:BLOOD GROUP--WRIGHT ANTIGEN;C1862191:BLOOD GROUP--WALDNER TYPE;C1862322:Southeast Asian ovalocytosis;C1970028:Malaria, susceptibility to;C2675212:Hereditary spherocytosis type 4;C5436235:Renal tubular acidosis, distal, 4, with hemolytic anemia;CN280572:Autosomal dominant distal renal tubular acidosis

Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

Fulgent Genetics, Fulgent Genetics

Jul 30, 2021

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.60

BayesDel_addAF

Pathogenic

0.36

BayesDel_noAF

Pathogenic

0.27

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.69

Eigen

Uncertain

0.59

Eigen_PC

Uncertain

0.50

FATHMM_MKL

Uncertain

0.92

LIST_S2

Pathogenic

0.98

M_CAP

Uncertain

0.14

MetaRNN

Pathogenic

0.97

MetaSVM

Uncertain

0.47

MutationAssessor

Pathogenic

3.3

MutationTaster

Benign

1.0

PrimateAI

Uncertain

0.62

PROVEAN

Benign

-2.2

REVEL

Uncertain

0.63

Sift

Uncertain

0.010

Sift4G

Uncertain

0.019

Polyphen

1.0

Vest4

0.76

MutPred

0.89

Loss of stability (P = 0.1996);

MVP

0.89

MPC

1.1

ClinPred

0.95

GERP RS

5.6

Varity_R

0.86

gMVP

0.67

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