rs7197218

Positions:

• chr16-17317778-A-G

Variant summary

Our verdict is Benign. Variant got -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_022166.4(XYLT1):​c.402+40234T>C variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0249 in 152,092 control chromosomes in the GnomAD database, including 158 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: 𝑓 0.025 (158 hom., cov: 30)
• Consequence: XYLT1 NM_022166.4 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.165

Genes affected

XYLT1 (HGNC:15516): (xylosyltransferase 1) This locus encodes a xylosyltransferase enzyme. The encoded protein catalyzes transfer of UDP-xylose to serine residues of an acceptor protein substrate. This transfer reaction is necessary for biosynthesis of glycosaminoglycan chains. Mutations in this gene have been associated with increased severity of pseudoxanthoma elasticum.[provided by RefSeq, Nov 2009]

ACMG classification

Verdict is Benign. Variant got -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.87).
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.0832 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
XYLT1	NM_022166.4	c.402+40234T>C		intron_variant		ENST00000261381.7	NP_071449.1
XYLT1	XM_017023539.3	c.402+40234T>C		intron_variant			XP_016879028.1
XYLT1	XM_047434458.1	c.364-58280T>C		intron_variant			XP_047290414.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
XYLT1	ENST00000261381.7	c.402+40234T>C		intron_variant		1	NM_022166.4	ENSP00000261381	P1

Frequencies

GnomAD3 genomes AF: 0.0248 AC: 3774 AN: 151986 Hom.: 155 Cov.: 30

Gnomad AFR AF: 0.0854

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00898

Gnomad ASJ AF: 0.00317

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000207

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00633

Gnomad NFE AF: 0.000853

Gnomad OTH AF: 0.0154

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.0249 AC: 3787 AN: 152092 Hom.: 158 Cov.: 30 AF XY: 0.0239 AC XY: 1779 AN XY: 74344

Gnomad4 AFR AF: 0.0855

Gnomad4 AMR AF: 0.00890

Gnomad4 ASJ AF: 0.00317

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.000207

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.000853

Gnomad4 OTH AF: 0.0152

Alfa AF: 0.00683 Hom.: 42

Bravo AF: 0.0284

Asia WGS AF: 0.00462 AC: 16 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.87
CADD	Benign	2.8
DANN	Benign	0.79

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

LitVar

Other links and lift over

dbSNP: rs7197218; hg19: chr16-17411635;