12-63808851-A-C

Position:

chr12-63808851-A-C

Variant summary

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

The NM_014254.3(RXYLT1):c.1091A>C(p.Asn364Thr) variant causes a missense change. The variant allele was found at a frequency of 0.0000235 in 1,614,156 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.00013 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000012 ( 0 hom. )

Consequence

RXYLT1
NM_014254.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:3

Conservation

PhyloP100: 6.95

Variant links:

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]

RXYLT1 links:

RXYLT1 (HGNC:):

RXYLT1 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=0.1311082).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
RXYLT1	NM_014254.3 linkuse as main transcript	c.1091A>C	p.Asn364Thr	missense_variant	6/6	ENST00000261234.11	NP_055069.1	Q9Y2B1
RXYLT1	NM_001278237.2 linkuse as main transcript	c.311A>C	p.Asn104Thr	missense_variant	6/6		NP_001265166.1	Q9Y2B1
RXYLT1	XM_047428078.1 linkuse as main transcript	c.782A>C	p.Asn261Thr	missense_variant	5/5		XP_047284034.1
RXYLT1-AS1	NR_126167.1 linkuse as main transcript	n.557T>G		non_coding_transcript_exon_variant	4/4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
RXYLT1	ENST00000261234.11 linkuse as main transcript	c.1091A>C	p.Asn364Thr	missense_variant	6/6	1	NM_014254.3	ENSP00000261234.6		Q9Y2B1

Frequencies

GnomAD3 genomes

AF:

0.000131

AC:

AN:

152190

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000458

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000655

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000438

AC:

AN:

251368

Hom.:

AF XY:

0.0000294

AC XY:

AN XY:

135862

show subpopulations

Gnomad AFR exome

AF:

0.000492

Gnomad AMR exome

AF:

0.0000579

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000327

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000123

AC:

AN:

1461848

Hom.:

Cov.:

AF XY:

0.0000138

AC XY:

AN XY:

727226

show subpopulations

Gnomad4 AFR exome

AF:

0.000358

Gnomad4 AMR exome

AF:

0.0000671

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000116

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.0000331

GnomAD4 genome

AF:

0.000131

AC:

AN:

152308

Hom.:

Cov.:

AF XY:

0.000107

AC XY:

AN XY:

74484

show subpopulations

Gnomad4 AFR

AF:

0.000457

Gnomad4 AMR

AF:

0.0000654

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000333

Hom.:

Bravo

AF:

0.000196

ESP6500AA

AF:

0.000681

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.0000824

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	GeneDx	Feb 08, 2017	A variant of uncertain significance has been identified in the TMEM5 gene. The N364T variant has not been published as a pathogenic variant, nor has it been reported as a benign variant to our knowledge. The N364T variant is not observed at a significant frequency in large population cohorts (Lek et al., 2016; 1000 Genomes Consortium et al., 2015; Exome Variant Server). This substitution occurs at a position that is conserved in mammals. In silico analysis predicts this variant is probably damaging to the protein structure/function. However, the N364T variant is a conservative amino acid substitution, which is not likely to impact secondary protein structure as these residues share similar properties. Therefore, based on the currently available information, it is unclear whether this variant is a pathogenic variant or a rare benign variant. -
Uncertain significance, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Oct 17, 2022	This sequence change replaces asparagine, which is neutral and polar, with threonine, which is neutral and polar, at codon 364 of the RXYLT1 protein (p.Asn364Thr). This variant is present in population databases (rs144060489, gnomAD 0.05%). This variant has not been reported in the literature in individuals affected with RXYLT1-related conditions. ClinVar contains an entry for this variant (Variation ID: 423360). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt RXYLT1 protein function. 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. -

Inborn genetic diseases

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jun 17, 2024

The c.1091A>C (p.N364T) alteration is located in exon 6 (coding exon 6) of the TMEM5 gene. This alteration results from a A to C substitution at nucleotide position 1091, causing the asparagine (N) at amino acid position 364 to be replaced by a threonine (T). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.19

BayesDel_addAF

Benign

-0.22

BayesDel_noAF

Benign

-0.21

CADD

Benign

DANN

Uncertain

0.98

DEOGEN2

Benign

0.0094

T;.

Eigen

Uncertain

0.49

Eigen_PC

Uncertain

0.41

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Benign

0.76

T;T

M_CAP

Benign

0.022

MetaRNN

Benign

0.13

T;T

MetaSVM

Uncertain

-0.23

PrimateAI

Uncertain

0.54

PROVEAN

Uncertain

-2.6

D;D

REVEL

Benign

0.24

Sift

Benign

0.12

T;T

Sift4G

Benign

0.46

T;T

Polyphen

1.0

D;D

Vest4

0.42

MVP

0.040

MPC

0.53

ClinPred

0.16

GERP RS

4.9

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.11

gMVP

0.41

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

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