rs121912756

Positions:

• chr17-44257538-C-T

Variant summary

Our verdict is Likely benign. Variant got -1 ACMG points: 0P and 1B. BP4

The ENST00000262418.12(SLC4A1):​c.1438G>A​(p.Glu480Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000479 in 1,461,766 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Affects (no stars). Another nucleotide change resulting in same amino acid change has been previously reported as Likely benignin UniProt.

• Frequency:
  • Genomes: not found (cov: 31)
  • Exomes 𝑓: 0.0000048 (0 hom.)
• Consequence: SLC4A1 ENST00000262418.12 missense
• Clinical Significance: Affects no assertion criteria provided O:1
• Conservation: PhyloP100: -1.65

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]

ACMG classification

Verdict is Likely_benign. Variant got -1 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.34806532).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
SLC4A1	NM_000342.4	c.1438G>A	p.Glu480Lys	missense_variant	13/20	ENST00000262418.12	NP_000333.1
SLC4A1	XM_011525129.3	c.1438G>A	p.Glu480Lys	missense_variant	13/19		XP_011523431.1
SLC4A1	XM_005257593.6	c.1243G>A	p.Glu415Lys	missense_variant	11/18		XP_005257650.1
SLC4A1	XM_011525130.2	c.1438G>A	p.Glu480Lys	missense_variant	13/18		XP_011523432.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
SLC4A1	ENST00000262418.12	c.1438G>A	p.Glu480Lys	missense_variant	13/20	1	NM_000342.4	ENSP00000262418	P1
SLC4A1	ENST00000399246.3	c.777+1724G>A		intron_variant		5		ENSP00000382190

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD3 exomes AF: 0.00000796 AC: 2 AN: 251206 Hom.: 0 AF XY: 0.00000736 AC XY: 1 AN XY: 135808

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: 0.0000466

Gnomad NFE exome AF: 0.00000880

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000479 AC: 7 AN: 1461766 Hom.: 0 Cov.: 33 AF XY: 0.00000275 AC XY: 2 AN XY: 727186

Gnomad4 AFR exome AF: 0.0000299

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: 0.00000540

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 31

ExAC AF: 0.00000824 AC: 1

ClinVar

Significance: Affects

Submissions summary: Other:1

Revision: no assertion criteria provided

Submissions by phenotype

BLOOD GROUP--FROESE Other:1

Affects, no assertion criteria provided

literature only

OMIM

Oct 01, 2000

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.088
BayesDel_addAF	Benign	-0.22	T
BayesDel_noAF	Benign	-0.55
CADD	Benign	0.073
DANN	Benign	0.56
DEOGEN2	Benign	0.27	T
Eigen	Benign	-1.5
Eigen_PC	Benign	-1.5
FATHMM_MKL	Benign	0.028	N
LIST_S2	Benign	0.84	T
M_CAP	Benign	0.027	D
MetaRNN	Benign	0.35	T
MetaSVM	Benign	-0.91	T
MutationAssessor	Benign	-0.88	N
MutationTaster	Benign	5.2e-9	A
PrimateAI	Benign	0.27	T
PROVEAN	Benign	-0.33	N
REVEL	Benign	0.12
Sift	Benign	0.66	T
Sift4G	Benign	1.0	T
Polyphen		0.0010	B
Vest4		0.22
MutPred		0.46		Gain of methylation at E480 (P = 0.0053);
MVP		0.44
MPC		0.39
ClinPred		0.025	T
GERP RS		-4.4
Varity_R		0.27
gMVP		0.30

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

Other links and lift over

dbSNP: rs121912756; hg19: chr17-42334906; COSMIC: COSV99293516; COSMIC: COSV99293516;