rs140079332

Variant names:

Your query was ambiguous. Multiple possible variants found:

Variant summary

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

The NM_005660.3(SLC35A2):c.958G>T(p.Val320Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000165 in 1,209,466 control chromosomes in the GnomAD database, with no homozygous occurrence. There are no hemizygote samples in GnomAD. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. V320M) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.0000089 ( 0 hom., 0 hem., cov: 24)

Exomes 𝑓: 9.1e-7 ( 0 hom. 0 hem. )

Consequence

SLC35A2
NM_005660.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 1.11

Publications

0 publications found

Variant links:

Genes affected

SLC35A2 (HGNC:11022): (solute carrier family 35 member A2) This gene encodes a member of the nucleotide-sugar transporter family. The encoded protein is a multi-pass membrane protein. It transports UDP-galactose from the cytosol into Golgi vesicles, where it serves as a glycosyl donor for the generation of glycans. Mutations in this gene cause congenital disorder of glycosylation type IIm (CDG2M). Multiple alternatively spliced transcript variants encoding distinct isoforms have been found for this gene. [provided by RefSeq, Oct 2014]

SLC35A2 Gene-Disease associations (from GenCC):

SLC35A2-congenital disorder of glycosylation
Inheritance: XL, Unknown Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Illumina, Orphanet, G2P, Ambry Genetics, Labcorp Genetics (formerly Invitae)
X-linked complex neurodevelopmental disorder
Inheritance: XL Classification: DEFINITIVE Submitted by: ClinGen

SLC35A2 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=0.07769337).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SLC35A2	NM_005660.3 link	c.958G>T	p.Val320Leu	missense_variant	Exon 4 of 5	ENST00000247138.11	NP_005651.1	P78381-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SLC35A2	ENST00000247138.11 link	c.958G>T	p.Val320Leu	missense_variant	Exon 4 of 5	1	NM_005660.3	ENSP00000247138.5		P78381-1

Frequencies

GnomAD3 genomes

AF:

0.00000892

AC:

AN:

112084

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:

0.0000188

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

9.11e-7

AC:

AN:

1097382

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

362762

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

26396

American (AMR)

AF:

0.00

AC:

AN:

35143

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

19375

East Asian (EAS)

AF:

0.00

AC:

AN:

30191

South Asian (SAS)

AF:

0.00

AC:

AN:

53998

European-Finnish (FIN)

AF:

0.00

AC:

AN:

40494

Middle Eastern (MID)

AF:

0.00

AC:

AN:

4128

European-Non Finnish (NFE)

AF:

0.00000119

AC:

AN:

841594

Other (OTH)

AF:

0.00

AC:

AN:

46063

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.475

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.00000892

AC:

AN:

112084

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

34262

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

30855

American (AMR)

AF:

0.00

AC:

AN:

10614

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

2643

East Asian (EAS)

AF:

0.00

AC:

AN:

3587

South Asian (SAS)

AF:

0.00

AC:

AN:

2728

European-Finnish (FIN)

AF:

0.00

AC:

AN:

6082

Middle Eastern (MID)

AF:

0.00

AC:

AN:

239

European-Non Finnish (NFE)

AF:

0.0000188

AC:

AN:

53137

Other (OTH)

AF:

0.00

AC:

AN:

1512

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.525

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.00

Hom.:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

SLC35A2-congenital disorder of glycosylation

Uncertain:1

Aug 31, 2021

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change replaces valine with leucine at codon 320 of the SLC35A2 protein (p.Val320Leu). The valine residue is moderately conserved and there is a small physicochemical difference between valine and leucine. This variant is not present in population databases (ExAC no frequency). This variant has not been reported in the literature in individuals affected with SLC35A2-related conditions. Algorithms developed to predict the effect of missense changes on protein structure and function output the following: SIFT: "Tolerated"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0". The leucine amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect protein function. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.16

BayesDel_addAF

Benign

-0.32

BayesDel_noAF

Benign

-0.70

CADD

Benign

(source)

DANN

Benign

0.84

DEOGEN2

Benign

0.25

T;.;.;T;.

FATHMM_MKL

Benign

0.69

LIST_S2

Benign

0.82

T;T;T;T;T

M_CAP

Uncertain

0.16

MetaRNN

Benign

0.078

T;T;T;T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

0.015

N;N;.;.;.

PhyloP100

1.1

PrimateAI

Uncertain

0.56

PROVEAN

Benign

0.53

N;N;.;.;N

REVEL

Benign

0.047

Sift

Benign

1.0

T;T;.;.;T

Sift4G

Benign

0.79

T;T;T;T;T

Polyphen

0.0030

B;B;.;B;.

Vest4

0.20

MutPred

0.69

Loss of sheet (P = 0.1158);Loss of sheet (P = 0.1158);.;.;.;

MVP

0.15

MPC

0.88

ClinPred

0.051

GERP RS

3.0

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.077

gMVP

0.78

Mutation Taster

=97/3

polymorphism

(source)

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

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over