Genetic Variant NM_001199633.2:c.1937G>A (chr9-84279277-C-T) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_001199633.2(SLC28A3):c.1937G>A(p.Ser646Asn) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000261 in 1,609,572 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000028 ( 0 hom. )

Consequence

SLC28A3
NM_001199633.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -0.126

Variant links:

Genes affected

SLC28A3 (HGNC:16484): (solute carrier family 28 member 3) Nucleoside transporters, such as SLC28A3, regulate multiple cellular processes, including neurotransmission, vascular tone, adenosine concentration in the vicinity of cell surface receptors, and transport and metabolism of nucleoside drugs. SLC28A3 shows broad specificity for pyrimidine and purine nucleosides (Ritzel et al., 2001 [PubMed 11032837]).[supplied by OMIM, Mar 2008]

SLC28A3 links:

SLC28A3-AS1 (HGNC:55460): (SLC28A3 regulatory antisense RNA 1)

SLC28A3-AS1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

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

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.07878971).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SLC28A3	NM_001199633.2 link	c.1937G>A	p.Ser646Asn	missense_variant	Exon 17 of 18	ENST00000376238.5	NP_001186562.1	Q9HAS3-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SLC28A3	ENST00000376238.5 link	c.1937G>A	p.Ser646Asn	missense_variant	Exon 17 of 18	1	NM_001199633.2	ENSP00000365413.4		Q9HAS3-1
SLC28A3-AS1	ENST00000419815.1 link	n.181+878C>T		intron_variant	Intron 1 of 1	3

Frequencies

GnomAD3 genomes

AF:

0.00000659

AC:

AN:

151696

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:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000161

AC:

AN:

248026

AF XY:

0.00000747

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 FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000266

Gnomad OTH exome

AF:

0.000165

GnomAD4 exome

AF:

0.0000281

AC:

AN:

1457876

Hom.:

Cov.:

AF XY:

0.0000248

AC XY:

AN XY:

725116

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33168

American (AMR)

AF:

0.00

AC:

AN:

44100

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26026

East Asian (EAS)

AF:

0.00

AC:

AN:

39600

South Asian (SAS)

AF:

0.00

AC:

AN:

85312

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53322

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5748

European-Non Finnish (NFE)

AF:

0.0000315

AC:

AN:

1110406

Other (OTH)

AF:

0.0000997

AC:

AN:

60194

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.446

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.00000659

AC:

AN:

151696

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74050

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41242

American (AMR)

AF:

0.00

AC:

AN:

15234

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5188

South Asian (SAS)

AF:

0.00

AC:

AN:

4798

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10486

Middle Eastern (MID)

AF:

0.00

AC:

AN:

314

European-Non Finnish (NFE)

AF:

0.0000147

AC:

AN:

67968

Other (OTH)

AF:

0.00

AC:

AN:

2082

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.625

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.0000113

EpiCase

AF:

0.0000550

EpiControl

AF:

0.0000597

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Apr 10, 2025

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.1937G>A (p.S646N) alteration is located in exon 18 (coding exon 17) of the SLC28A3 gene. This alteration results from a G to A substitution at nucleotide position 1937, causing the serine (S) at amino acid position 646 to be replaced by an asparagine (N). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.063

BayesDel_addAF

Benign

-0.47

BayesDel_noAF

Benign

-0.84

CADD

Benign

(source)

DANN

Benign

0.76

DEOGEN2

Benign

0.0038

Eigen

Benign

-1.1

Eigen_PC

Benign

-1.1

FATHMM_MKL

Benign

0.016

LIST_S2

Benign

0.39

M_CAP

Benign

0.0086

MetaRNN

Benign

0.079

MetaSVM

Benign

-0.90

MutationAssessor

Benign

1.6

PhyloP100

-0.13

PrimateAI

Benign

0.33

PROVEAN

Benign

0.26

REVEL

Benign

0.030

Sift

Benign

0.37

Sift4G

Benign

0.46

Polyphen

0.0010

Vest4

0.16

MutPred

0.29

Loss of disorder (P = 0.1643);

MVP

0.014

MPC

0.17

ClinPred

0.022

GERP RS

-2.6

Varity_R

0.038

gMVP

0.25

Mutation Taster

=97/3

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.13

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

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NM_001199633.2:c.1937G>A

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over