17-50353638-G-T

Position:

chr17-50353638-G-T

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_022167.4(XYLT2):c.144G>T(p.Arg48Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000283 in 1,412,276 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000028 ( 0 hom. )

Consequence

XYLT2
NM_022167.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:2

Conservation

PhyloP100: 0.898

Variant links:

Genes affected

XYLT2 (HGNC:15517): (xylosyltransferase 2) The protein encoded by this gene is an isoform of xylosyltransferase, which belongs to a family of glycosyltransferases. This enzyme transfers xylose from UDP-xylose to specific serine residues of the core protein and initiates the biosynthesis of glycosaminoglycan chains in proteoglycans including chondroitin sulfate, heparan sulfate, heparin and dermatan sulfate. The enzyme activity, which is increased in scleroderma patients, is a diagnostic marker for the determination of sclerotic activity in systemic sclerosis. Alternatively spliced transcript variants have been found for this gene. [provided by RefSeq, Dec 2013]

XYLT2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.14772043).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
XYLT2	NM_022167.4 linkuse as main transcript	c.144G>T	p.Arg48Ser	missense_variant	2/11	ENST00000017003.7
XYLT2	XM_005257572.5 linkuse as main transcript	c.48G>T	p.Arg16Ser	missense_variant	2/11
XYLT2	XM_047436522.1 linkuse as main transcript	c.-448G>T		5_prime_UTR_variant	2/11
XYLT2	NR_110010.2 linkuse as main transcript	n.159G>T		non_coding_transcript_exon_variant	2/10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
XYLT2	ENST00000017003.7 linkuse as main transcript	c.144G>T	p.Arg48Ser	missense_variant	2/11	1	NM_022167.4	P1	Q9H1B5-1
XYLT2	ENST00000376550.7 linkuse as main transcript	c.144G>T	p.Arg48Ser	missense_variant, NMD_transcript_variant	2/10	1
XYLT2	ENST00000507602.5 linkuse as main transcript	c.144G>T	p.Arg48Ser	missense_variant	2/10	2
XYLT2	ENST00000509778.1 linkuse as main transcript	c.99G>T	p.Arg33Ser	missense_variant	2/2	3

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.0000231

AC:

AN:

173288

Hom.:

AF XY:

0.0000215

AC XY:

AN XY:

92836

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000112

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000755

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000283

AC:

AN:

1412276

Hom.:

Cov.:

AF XY:

0.00000287

AC XY:

AN XY:

698034

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.000106

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:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

Alfa

AF:

0.0000882

Hom.:

Bravo

AF:

0.00000756

ExAC

AF:

0.00000842

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jul 23, 2022

This sequence change replaces arginine, which is basic and polar, with serine, which is neutral and polar, at codon 48 of the XYLT2 protein (p.Arg48Ser). The frequency data for this variant in the population databases is considered unreliable, as metrics indicate poor data quality at this position in the gnomAD database. This variant has not been reported in the literature in individuals affected with XYLT2-related conditions. Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Tolerated"; PolyPhen-2: "Possibly Damaging"; Align-GVGD: "Class C0"). 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. -

XYLT2-related disorder

Uncertain:1

Uncertain significance, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Feb 02, 2024

The XYLT2 c.144G>T variant is predicted to result in the amino acid substitution p.Arg48Ser. To our knowledge, this variant has not been reported in the literature. This variant is reported in 0.011% of alleles in individuals of Latino descent in gnomAD. At this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.30

BayesDel_addAF

Benign

-0.054

BayesDel_noAF

Benign

-0.31

CADD

Benign

DANN

Benign

0.96

DEOGEN2

Benign

0.12

T;.;.

Eigen

Benign

-0.60

Eigen_PC

Benign

-0.69

FATHMM_MKL

Uncertain

0.83

LIST_S2

Benign

0.84

T;T;T

M_CAP

Uncertain

0.23

MetaRNN

Benign

0.15

T;T;T

MetaSVM

Benign

-0.70

MutationAssessor

Benign

1.9

L;.;.

MutationTaster

Benign

0.92

D;D

PrimateAI

Pathogenic

0.83

PROVEAN

Benign

-1.8

N;D;N

REVEL

Benign

0.15

Sift

Uncertain

0.010

D;D;D

Sift4G

Benign

0.20

T;D;T

Polyphen

0.98

D;.;.

Vest4

0.49

MutPred

0.20

Gain of phosphorylation at R48 (P = 0.0056);.;Gain of phosphorylation at R48 (P = 0.0056);

MVP

0.29

MPC

1.1

ClinPred

0.38

GERP RS

-1.7

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.25

gMVP

0.41

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.090

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over