17-44248849-GTTTTTTTTTTTTTTTT-GTTTTTTTTTTTTT

Variant names:

• chr17-44248849-GTTT-G
• rs57466226
• NM_000342.4:c.*1606_*1608delAAA

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 0P and 0B.

The NM_000342.4(SLC4A1):​c.*1606_*1608delAAA variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: 𝑓 0.0023 (0 hom., cov: 0)
  • Exomes 𝑓: 0.00091 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: SLC4A1 NM_000342.4 3_prime_UTR
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.139
• Publications: 1 publications found

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 Gene-Disease associations (from GenCC):

• autosomal dominant distal renal tubular acidosis

  Inheritance: AD, AR Classification: STRONG, SUPPORTIVE Submitted by: G2P, Orphanet, Labcorp Genetics (formerly Invitae)
• hereditary spherocytosis type 4

  Inheritance: AD Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)
• renal tubular acidosis, distal, 4, with hemolytic anemia

  Inheritance: AD, AR Classification: STRONG, SUPPORTIVE Submitted by: Orphanet, Labcorp Genetics (formerly Invitae)
• southeast Asian ovalocytosis

  Inheritance: AD Classification: STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Orphanet
• dehydrated hereditary stomatocytosis

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• hereditary spherocytosis

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• cryohydrocytosis

  Inheritance: Unknown, AD Classification: SUPPORTIVE, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), Orphanet

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SLC4A1	NM_000342.4	c.*1606_*1608delAAA		3_prime_UTR_variant	Exon 20 of 20	ENST00000262418.12	NP_000333.1
SLC4A1	XM_011525129.3	c.*1606_*1608delAAA		3_prime_UTR_variant	Exon 19 of 19		XP_011523431.1
SLC4A1	XM_005257593.6	c.*1606_*1608delAAA		3_prime_UTR_variant	Exon 18 of 18		XP_005257650.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SLC4A1	ENST00000262418.12	c.*1606_*1608delAAA		3_prime_UTR_variant	Exon 20 of 20	1	NM_000342.4	ENSP00000262418.6
SLC4A1	ENST00000399246.3	c.*1606_*1608delAAA		3_prime_UTR_variant	Exon 15 of 15	5		ENSP00000382190.3

Frequencies

GnomAD3 genomes AF: 0.00226 AC: 137 AN: 60722 Hom.: 0 Cov.: 0

Gnomad AFR AF: 0.00345

Gnomad AMI AF: 0.0110

Gnomad AMR AF: 0.00210

Gnomad ASJ AF: 0.000512

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00178

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00207

Gnomad OTH AF: 0.00132

GnomAD4 exome Data not reliable, filtered out with message: AS_VQSR AF: 0.000909 AC: 10 AN: 11002 Hom.: 0 AF XY: 0.00134 AC XY: 8 AN XY: 5978

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.00 AC: 0 AN: 42

American (AMR) AF: 0.00 AC: 0 AN: 658

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 164

East Asian (EAS) AF: 0.00 AC: 0 AN: 54

South Asian (SAS) AF: 0.00227 AC: 4 AN: 1760

European-Finnish (FIN) AF: 0.00173 AC: 1 AN: 578

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 32

European-Non Finnish (NFE) AF: 0.000418 AC: 3 AN: 7184

Other (OTH) AF: 0.00377 AC: 2 AN: 530

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0.000000), which strongly suggests a high chance of mosaicism in these individuals.

GnomAD4 genome AF: 0.00226 AC: 137 AN: 60728 Hom.: 0 Cov.: 0 AF XY: 0.00200 AC XY: 54 AN XY: 26962

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.00345 AC: 44 AN: 12768

American (AMR) AF: 0.00210 AC: 9 AN: 4276

Ashkenazi Jewish (ASJ) AF: 0.000512 AC: 1 AN: 1954

East Asian (EAS) AF: 0.00 AC: 0 AN: 1480

South Asian (SAS) AF: 0.00179 AC: 3 AN: 1676

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 1858

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 78

European-Non Finnish (NFE) AF: 0.00207 AC: 73 AN: 35334

Other (OTH) AF: 0.00132 AC: 1 AN: 760

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5. (p-value = 0.000000), which strongly suggests a high chance of mosaicism in these individuals.

Alfa AF: 0.00 Hom.: 73

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
PhyloP100		-0.14

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: rs57466226; hg19: chr17-42326217;