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

1
3
15

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts 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]

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 UniProt
XYLT2NM_022167.4 linkuse as main transcriptc.144G>T p.Arg48Ser missense_variant 2/11 ENST00000017003.7
XYLT2XM_005257572.5 linkuse as main transcriptc.48G>T p.Arg16Ser missense_variant 2/11
XYLT2XM_047436522.1 linkuse as main transcriptc.-448G>T 5_prime_UTR_variant 2/11
XYLT2NR_110010.2 linkuse as main transcriptn.159G>T non_coding_transcript_exon_variant 2/10

Ensembl

Gene Transcript HGVSc HGVSp Effect #exon/exons TSL MANE Appris UniProt
XYLT2ENST00000017003.7 linkuse as main transcriptc.144G>T p.Arg48Ser missense_variant 2/111 NM_022167.4 P1Q9H1B5-1
XYLT2ENST00000376550.7 linkuse as main transcriptc.144G>T p.Arg48Ser missense_variant, NMD_transcript_variant 2/101
XYLT2ENST00000507602.5 linkuse as main transcriptc.144G>T p.Arg48Ser missense_variant 2/102
XYLT2ENST00000509778.1 linkuse as main transcriptc.99G>T p.Arg33Ser missense_variant 2/23

Frequencies

GnomAD3 genomes
Cov.:
32
GnomAD3 exomes
AF:
0.0000231
AC:
4
AN:
173288
Hom.:
0
AF XY:
0.0000215
AC XY:
2
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:
4
AN:
1412276
Hom.:
0
Cov.:
31
AF XY:
0.00000287
AC XY:
2
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.:
32
Alfa
AF:
0.0000882
Hom.:
0
Bravo
AF:
0.00000756
ExAC
AF:
0.00000842
AC:
1

ClinVar

Significance: Uncertain significance
Submissions summary: Uncertain:2
Revision: criteria provided, multiple submitters, no conflicts
LINK: link

Submissions by phenotype

not provided Uncertain:1
Uncertain significance, criteria provided, single submitterclinical testingInvitaeJul 23, 2022This 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, criteria provided, single submitterclinical testingPreventionGenetics, part of Exact SciencesFeb 02, 2024The 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
T
BayesDel_noAF
Benign
-0.31
CADD
Benign
21
DANN
Benign
0.96
DEOGEN2
Benign
0.12
T;.;.
Eigen
Benign
-0.60
Eigen_PC
Benign
-0.69
FATHMM_MKL
Uncertain
0.83
D
LIST_S2
Benign
0.84
T;T;T
M_CAP
Uncertain
0.23
D
MetaRNN
Benign
0.15
T;T;T
MetaSVM
Benign
-0.70
T
MutationAssessor
Benign
1.9
L;.;.
MutationTaster
Benign
0.92
D;D
PrimateAI
Pathogenic
0.83
D
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
T
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.

Other links and lift over

dbSNP: rs777339294; hg19: chr17-48430999; API