chr17-44248737-C-T

Position:

chr17-44248737-C-T

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBS1BS2

The NM_000342.4(SLC4A1):c.*1721G>A variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0218 in 158,346 control chromosomes in the GnomAD database, including 52 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

Frequency

Genomes: 𝑓 0.022 ( 49 hom., cov: 31)

Exomes 𝑓: 0.026 ( 3 hom. )

Consequence

SLC4A1
NM_000342.4 3_prime_UTR

Scores

Clinical Significance

Benign criteria provided, multiple submitters, no conflicts B:4

Conservation

PhyloP100: -0.956

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 -20 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.86).

BP6

Variant 17-44248737-C-T is Benign according to our data. Variant chr17-44248737-C-T is described in ClinVar as [Benign]. Clinvar id is 323475.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population nfe. gnomad4 allele frequency = 0.0216 (3287/151958) while in subpopulation NFE AF= 0.033 (2245/67978). AF 95% confidence interval is 0.0319. There are 49 homozygotes in gnomad4. There are 1579 alleles in male gnomad4 subpopulation. Median coverage is 31. This position pass quality control queck.

BS2

High Homozygotes in GnomAd4 at 49 AD,AR,BG gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	Effect	#exon/exons	MANE	Protein
SLC4A1	NM_000342.4 linkuse as main transcript	c.*1721G>A	3_prime_UTR_variant	20/20	ENST00000262418.12	NP_000333.1
SLC4A1	XM_005257593.6 linkuse as main transcript	c.*1721G>A	3_prime_UTR_variant	18/18		XP_005257650.1
SLC4A1	XM_011525129.3 linkuse as main transcript	c.*1721G>A	3_prime_UTR_variant	19/19		XP_011523431.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
SLC4A1	ENST00000262418.12 linkuse as main transcript	c.*1721G>A		3_prime_UTR_variant	20/20	1	NM_000342.4	ENSP00000262418	P1	P02730-1
SLC4A1	ENST00000399246.3 linkuse as main transcript	c.*1721G>A		3_prime_UTR_variant	15/15	5		ENSP00000382190

Frequencies

GnomAD3 genomes

AF:

0.0217

AC:

3288

AN:

151848

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00579

Gnomad AMI

AF:

0.0866

Gnomad AMR

AF:

0.0200

Gnomad ASJ

AF:

0.0135

Gnomad EAS

AF:

0.000193

Gnomad SAS

AF:

0.0102

Gnomad FIN

AF:

0.0245

Gnomad MID

AF:

0.0160

Gnomad NFE

AF:

0.0330

Gnomad OTH

AF:

0.0294

GnomAD4 exome

AF:

0.0258

AC:

165

AN:

6388

Hom.:

Cov.:

AF XY:

0.0247

AC XY:

AN XY:

3476

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00980

Gnomad4 ASJ exome

AF:

0.0417

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00466

Gnomad4 FIN exome

AF:

0.0303

Gnomad4 NFE exome

AF:

0.0320

Gnomad4 OTH exome

AF:

0.0154

GnomAD4 genome

AF:

0.0216

AC:

3287

AN:

151958

Hom.:

Cov.:

AF XY:

0.0213

AC XY:

1579

AN XY:

74244

show subpopulations

Gnomad4 AFR

AF:

0.00577

Gnomad4 AMR

AF:

0.0200

Gnomad4 ASJ

AF:

0.0135

Gnomad4 EAS

AF:

0.000193

Gnomad4 SAS

AF:

0.00997

Gnomad4 FIN

AF:

0.0245

Gnomad4 NFE

AF:

0.0330

Gnomad4 OTH

AF:

0.0286

Alfa

AF:

0.0258

Hom.:

Bravo

AF:

0.0213

Asia WGS

AF:

0.00520

AC:

AN:

3478

ClinVar

Significance: Benign

Submissions summary: Benign:4

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Autosomal dominant distal renal tubular acidosis

Benign:1

Benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 13, 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. -

Hereditary spherocytosis type 4

Benign:1

Benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 13, 2018

not provided

Benign:1

Benign, criteria provided, single submitter

not provided

Breakthrough Genomics, Breakthrough Genomics

- -

Hemolytic anemia

Benign:1

Benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 13, 2018

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.86

CADD

Benign

0.48

DANN

Benign

0.64

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.0

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