Genetic Variant SLC29A1:p.Leu343Phe (chr6-44232398-G-T) – ACMG Classification: Uncertain_significance (1 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM2BP4

The NM_001372327.1(SLC29A1):c.1029G>T(p.Leu343Phe) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,414 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another nucleotide change resulting in the same amino acid substitution has been previously reported as Uncertain significance in ClinVar.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

SLC29A1
NM_001372327.1 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: -0.211

Publications

0 publications found

Variant links:

Genes affected

SLC29A1 (HGNC:11003): (solute carrier family 29 member 1 (Augustine blood group)) This gene is a member of the equilibrative nucleoside transporter family. The gene encodes a transmembrane glycoprotein that localizes to the plasma and mitochondrial membranes and mediates the cellular uptake of nucleosides from the surrounding medium. The protein is categorized as an equilibrative (as opposed to concentrative) transporter that is sensitive to inhibition by nitrobenzylthioinosine (NBMPR). Nucleoside transporters are required for nucleotide synthesis in cells that lack de novo nucleoside synthesis pathways, and are also necessary for the uptake of cytotoxic nucleosides used for cancer and viral chemotherapies. Multiple alternatively spliced variants, encoding the same protein, have been found for this gene. [provided by RefSeq, Jul 2008]

SLC29A1 links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.33953303).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001372327.1. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
SLC29A1	NM_001372327.1	MANE Select	c.1029G>T	p.Leu343Phe	missense	Exon 11 of 13	NP_001359256.1	Q99808-1
SLC29A1	NM_001304462.2		c.1266G>T	p.Leu422Phe	missense	Exon 12 of 14	NP_001291391.1	Q99808-2
SLC29A1	NM_001304465.2		c.1107G>T	p.Leu369Phe	missense	Exon 11 of 13	NP_001291394.1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
SLC29A1	ENST00000371755.9	TSL:1 MANE Select	c.1029G>T	p.Leu343Phe	missense	Exon 11 of 13	ENSP00000360820.3	Q99808-1
SLC29A1	ENST00000371708.1	TSL:1	c.1029G>T	p.Leu343Phe	missense	Exon 10 of 12	ENSP00000360773.1	Q99808-1
SLC29A1	ENST00000393844.7	TSL:1	c.1029G>T	p.Leu343Phe	missense	Exon 11 of 13	ENSP00000377427.1	Q99808-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1461414

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

727068

show subpopulations

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

African (AFR)

AF:

0.00

AC:

AN:

33460

American (AMR)

AF:

0.00

AC:

AN:

44716

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39698

South Asian (SAS)

AF:

0.0000116

AC:

AN:

86246

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53410

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1111600

Other (OTH)

AF:

0.00

AC:

AN:

60380

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.225

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.10

BayesDel_addAF

Benign

-0.078

BayesDel_noAF

Benign

-0.35

CADD

Benign

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.22

Eigen

Benign

-0.053

Eigen_PC

Benign

-0.11

FATHMM_MKL

Benign

0.30

LIST_S2

Benign

0.85

M_CAP

Benign

0.025

MetaRNN

Benign

0.34

MetaSVM

Benign

-0.88

MutationAssessor

Benign

1.9

PhyloP100

-0.21

PrimateAI

Benign

0.35

PROVEAN

Benign

-1.2

REVEL

Uncertain

0.30

Sift

Benign

0.28

Sift4G

Benign

0.55

Polyphen

0.91

Vest4

0.37

MVP

0.32

ClinPred

0.68

GERP RS

0.77

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.21

Mutation Taster

=59/41

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

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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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

ClinVar

Computational scores

Splicing

Publications

Other links and lift over