Genetic Variant SLC35A2:p.Thr10Thr (chrX-48911607-G-A) – ACMG Classification: Likely_benign (-5 pts)

Variant summary

Our verdict is Likely benign. The variant received -5 ACMG points: 2P and 7B. PM2BP4_StrongBP6_ModerateBP7

The NM_005660.3(SLC35A2):c.30C>T(p.Thr10Thr) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000952 in 1,050,132 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. Variant has been reported in ClinVar as Likely benign (★). Synonymous variant affecting the same amino acid position (i.e. T10T) has been classified as Likely benign.

Frequency

Genomes: not found (cov: 25)

Exomes 𝑓: 9.5e-7 ( 0 hom. 0 hem. )

Consequence

SLC35A2
NM_005660.3 synonymous

Scores

Clinical Significance

Likely benign criteria provided, single submitter B:1

Conservation

PhyloP100: 0.409

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: Likely_benign. The variant received -5 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.61).

BP6

Variant X-48911607-G-A is Benign according to our data. Variant chrX-48911607-G-A is described in ClinVar as [Likely_benign]. Clinvar id is 2162830.Status of the report is criteria_provided_single_submitter, 1 stars.

BP7

Synonymous conserved (PhyloP=0.409 with no splicing effect.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SLC35A2	NM_005660.3 link	c.30C>T	p.Thr10Thr	synonymous_variant	Exon 1 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.30C>T	p.Thr10Thr	synonymous_variant	Exon 1 of 5	1	NM_005660.3	ENSP00000247138.5		P78381-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.0000187

AC:

AN:

106777

AF XY:

0.00

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:

0.0000476

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

9.52e-7

AC:

AN:

1050132

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

342778

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

24991

American (AMR)

AF:

0.00

AC:

AN:

28765

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

18652

East Asian (EAS)

AF:

0.00

AC:

AN:

27353

South Asian (SAS)

AF:

0.00

AC:

AN:

50027

European-Finnish (FIN)

AF:

0.00

AC:

AN:

31162

Middle Eastern (MID)

AF:

0.00

AC:

AN:

3514

European-Non Finnish (NFE)

AF:

0.00000122

AC:

AN:

821310

Other (OTH)

AF:

0.00

AC:

AN:

44358

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.575

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

Alfa

AF:

0.0000364

Hom.:

Bravo

AF:

0.00000756

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

SLC35A2-congenital disorder of glycosylation

Benign:1

Jun 07, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.61

CADD

Benign

6.8

(source)

DANN

Benign

0.90

PhyloP100

0.41

PromoterAI

-0.0074

Neutral

(source)

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over