2-44275536-A-G

Variant names:

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PVS1_SupportingPM2

The NM_000341.4(SLC3A1):c.1A>G(p.Met1?) variant causes a start lost change. The variant allele was found at a frequency of 0.00000186 in 1,613,862 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 Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 31)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

SLC3A1
NM_000341.4 start_lost

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 4.22

Variant links:

Genes affected

SLC3A1 (HGNC:11025): (solute carrier family 3 member 1) This gene encodes a type II membrane glycoprotein which is one of the components of the renal amino acid transporter which transports neutral and basic amino acids in the renal tubule and intestinal tract. Mutations and deletions in this gene are associated with cystinuria. Alternatively spliced transcript variants have been described, but their biological validity has not been determined. [provided by RefSeq, Jul 2008]

SLC3A1 links:

ENSG00000285542 (HGNC:):

ENSG00000285542 links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 3 ACMG points.

PVS1

Start lost variant, no pathogenic variants between lost start and next in-frame start position. Next in-frame start position is after 13 codons. Genomic position: 44275572. Lost 0.018 part of the original CDS.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SLC3A1	NM_000341.4 link	c.1A>G	p.Met1?	start_lost	Exon 1 of 10	ENST00000260649.11	NP_000332.2	Q07837-1A0A0S2Z4E1
SLC3A1	XM_011533047.4 link	c.1A>G	p.Met1?	start_lost	Exon 1 of 10		XP_011531349.1	B8ZZK1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
SLC3A1	ENST00000260649.11 link	c.1A>G	p.Met1?	start_lost	Exon 1 of 10	1	NM_000341.4	ENSP00000260649.6	Q07837-1
ENSG00000285542	ENST00000649044.1 link	n.*12A>G		non_coding_transcript_exon_variant	Exon 6 of 15			ENSP00000497083.1	A0A3B3IS24
ENSG00000285542	ENST00000649044.1 link	n.*12A>G		3_prime_UTR_variant	Exon 6 of 15			ENSP00000497083.1	A0A3B3IS24

Frequencies

GnomAD3 genomes

AF:

0.0000131

AC:

AN:

152226

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:

0.000414

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.00000399

AC:

AN:

250766

Hom.:

AF XY:

0.00

AC XY:

AN XY:

135566

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:

0.0000328

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1461518

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

727028

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:

0.0000131

AC:

AN:

152344

Hom.:

Cov.:

AF XY:

0.0000134

AC XY:

AN XY:

74508

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:

0.000414

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

ExAC

AF:

0.00000824

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Nov 16, 2023

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Variant summary: SLC3A1 c.1A>G (p.Met1Val) alters the initiation codon and is predicted to result either in absence of the protein or truncation of the encoded protein due to translation initiation at a downstream codon. An alternative downstream in-frame start codon (Met13) is located in the encoded protein. An activation of this potential downstream translation initiation site would result in a shortened protein missing the first 12 amino acids from the protein sequence. To our knowledge no pathogenic variants have been reported upstream of this alternate codon. Two of three in-silico tools predict a damaging effect of the variant on protein function. The variant allele was found at a frequency of 4e-06 in 250766 control chromosomes (gnomAD). The available data on variant occurrences in the general population are insufficient to allow any conclusion about variant significance. To our knowledge, no occurrence of c.1A>G in individuals affected with Cystinuria and no experimental evidence demonstrating its impact on protein function have been reported. No submitters have cited clinical-significance assessments for this variant to ClinVar after 2014. Based on the evidence outlined above, the variant was classified as uncertain significance. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Pathogenic

0.44

BayesDel_noAF

Pathogenic

0.49

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Benign

0.016

T;T;T;.;.;.

Eigen

Uncertain

0.54

Eigen_PC

Uncertain

0.51

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Uncertain

0.90

D;D;D;D;D;D

M_CAP

Pathogenic

0.38

MetaRNN

Pathogenic

0.98

D;D;D;D;D;D

MetaSVM

Pathogenic

1.1

PROVEAN

Benign

-1.2

.;N;N;N;N;N

REVEL

Pathogenic

0.85

Sift

Pathogenic

0.0

.;D;D;D;D;D

Sift4G

Pathogenic

0.0

D;D;D;D;D;D

Polyphen

0.98

.;D;D;.;.;.

Vest4

0.86

MutPred

1.0

Loss of MoRF binding (P = 0.2983);Loss of MoRF binding (P = 0.2983);Loss of MoRF binding (P = 0.2983);Loss of MoRF binding (P = 0.2983);Loss of MoRF binding (P = 0.2983);Loss of MoRF binding (P = 0.2983);

MVP

0.99

ClinPred

0.99

GERP RS

5.0

Varity_R

0.86

gMVP

0.45

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