rs141095352

Positions:

• chr12-63781101-C-G
• chr12-63781101-C-T

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The ENST00000261234.11(RXYLT1):​c.252C>G​(p.Ser84Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000686 in 1,456,682 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/20 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. S84G) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 6.9e-7 (0 hom.)
• Consequence: RXYLT1 ENST00000261234.11 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.518

Genes affected

RXYLT1 (HGNC:13530): (ribitol xylosyltransferase 1) This gene encodes a type II transmembrane protein that is thought to have glycosyltransferase function. Mutations in this gene result in cobblestone lissencephaly. Alternative splicing results in multiple transcript variants encoding different isoforms. [provided by RefSeq, May 2013]

(HGNC:):

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=0.039723545).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
RXYLT1	NM_014254.3	c.252C>G	p.Ser84Arg	missense_variant	2/6	ENST00000261234.11	NP_055069.1
RXYLT1	XM_047428079.1	c.252C>G	p.Ser84Arg	missense_variant	2/5		XP_047284035.1
RXYLT1	NM_001278237.2	c.-529C>G		5_prime_UTR_variant	2/6		NP_001265166.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
RXYLT1	ENST00000261234.11	c.252C>G	p.Ser84Arg	missense_variant	2/6	1	NM_014254.3	ENSP00000261234	P1
	ENST00000509615.2	n.238+14380G>C		intron_variant, non_coding_transcript_variant		5

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 6.86e-7 AC: 1 AN: 1456682 Hom.: 0 Cov.: 30 AF XY: 0.00000138 AC XY: 1 AN XY: 724614

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.0000228

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.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.15
BayesDel_addAF	Benign	-0.28	T
BayesDel_noAF	Benign	-0.64
CADD	Benign	3.8
DANN	Benign	0.68
DEOGEN2	Benign	0.0016	T
Eigen	Benign	-1.2
Eigen_PC	Benign	-1.2
FATHMM_MKL	Benign	0.086	N
LIST_S2	Benign	0.56	T
M_CAP	Benign	0.0042	T
MetaRNN	Benign	0.040	T
MetaSVM	Benign	-1.0	T
MutationTaster	Benign	1.0	D;N
PrimateAI	Benign	0.33	T
PROVEAN	Benign	-0.63	N
REVEL	Benign	0.045
Sift	Benign	0.38	T
Sift4G	Benign	0.70	T
Polyphen		0.0010	B
Vest4		0.23
MutPred		0.23		Gain of MoRF binding (P = 0.0249);
MVP		0.030
MPC		0.19
ClinPred		0.12	T
GERP RS		-3.0
Varity_R		0.051
gMVP		0.30

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: rs141095352; hg19: chr12-64174881;