chrX-48904753-G-A

Position:

• chrX-48904753-G-A

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2 BP4_Moderate BP6_Moderate

The ENST00000445167.7(SLC35A2):​c.566C>T​(p.Ser189Phe) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000364 in 1,097,993 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 1 hemizygotes in GnomAD. In-silico tool predicts a benign outcome for this variant. 8/13 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★).

• Frequency:
  • Genomes: not found (cov: 24)
  • Exomes 𝑓: 0.0000036 (0 hom. 1 hem.)
• Consequence: SLC35A2 ENST00000445167.7 missense
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: 7.74

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]

ACMG classification

Verdict is Likely_benign. Variant got -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.22405341).
• BP6: Variant X-48904753-G-A is Benign according to our data. Variant chrX-48904753-G-A is described in ClinVar as [Likely_benign]. Clinvar id is 1622521.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SLC35A2	NM_005660.3	c.1156C>T	p.Leu386=	synonymous_variant	4/5	ENST00000247138.11

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SLC35A2	ENST00000247138.11	c.1156C>T	p.Leu386=	synonymous_variant	4/5	1	NM_005660.3	P1

Frequencies

GnomAD3 genomes Cov.: 24

GnomAD4 exome AF: 0.00000364 AC: 4 AN: 1097993 Hom.: 0 Cov.: 31 AF XY: 0.00000275 AC XY: 1 AN XY: 363353

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: 0.00000475

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 24

Bravo AF: 0.00000378

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

SLC35A2-congenital disorder of glycosylation Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Mar 14, 2023

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Benign	-0.23	T
BayesDel_noAF	Benign	-0.56
CADD	Benign	10
DANN	Uncertain	1.0
FATHMM_MKL	Uncertain	0.95	D
LIST_S2	Benign	0.59	T;T;T
M_CAP	Uncertain	0.25	D
MetaRNN	Benign	0.22	T;T;T
MetaSVM	Benign	-0.89	T
MutationTaster	Benign	1.0	D;D;D;D;N;N;N
PROVEAN	Benign	-0.66	N;N;N
REVEL	Benign	0.13
Sift	Uncertain	0.0020	D;D;D
Sift4G	Uncertain	0.042	D;D;D
Polyphen		0.0050	.;B;.
Vest4		0.33
MutPred		0.49		Gain of sheet (P = 0.0149);Gain of sheet (P = 0.0149);.;
MVP		0.082
ClinPred		0.80	D
GERP RS		4.4

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.060		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

Other links and lift over

dbSNP: rs2063474261; hg19: chrX-48762030;