rs568474177

Variant names:

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2PP3_Moderate

The NM_052859.4(RFT1):c.1018G>A(p.Gly340Ser) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000378 in 1,614,156 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.000033 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000038 ( 0 hom. )

Consequence

RFT1
NM_052859.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2

Conservation

PhyloP100: 7.84

Variant links:

Genes affected

RFT1 (HGNC:30220): (RFT1 homolog) This gene encodes an enzyme which catalyzes the translocation of the Man(5)GlcNAc (2)-PP-Dol intermediate from the cytoplasmic to the luminal side of the endoplasmic reticulum membrane in the pathway for the N-glycosylation of proteins. Mutations in this gene are associated with congenital disorder of glycosylation type In.[provided by RefSeq, Dec 2008]

RFT1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 4 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.885

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
RFT1	NM_052859.4 link	c.1018G>A	p.Gly340Ser	missense_variant	Exon 10 of 13	ENST00000296292.8	NP_443091.1	Q96AA3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
RFT1	ENST00000296292.8 link	c.1018G>A	p.Gly340Ser	missense_variant	Exon 10 of 13	1	NM_052859.4	ENSP00000296292.3	Q96AA3
RFT1	ENST00000394738.7 link	c.901G>A	p.Gly301Ser	missense_variant	Exon 9 of 12	5		ENSP00000378223.3	B5MDE0
RFT1	ENST00000471158.1 link	n.460G>A		non_coding_transcript_exon_variant	Exon 5 of 5	3
RFT1	ENST00000467048.1 link	c.*5G>A		downstream_gene_variant		3		ENSP00000420325.1	C9JP01

Frequencies

GnomAD3 genomes

AF:

0.0000329

AC:

AN:

152204

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.0000941

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000441

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000319

AC:

AN:

251130

Hom.:

AF XY:

0.00000737

AC XY:

AN XY:

135726

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.000229

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000881

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000383

AC:

AN:

1461834

Hom.:

Cov.:

AF XY:

0.0000330

AC XY:

AN XY:

727222

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.000128

Gnomad4 FIN exome

AF:

0.0000187

Gnomad4 NFE exome

AF:

0.0000387

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

AF:

0.0000328

AC:

AN:

152322

Hom.:

Cov.:

AF XY:

0.0000134

AC XY:

AN XY:

74484

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000207

Gnomad4 FIN

AF:

0.0000941

Gnomad4 NFE

AF:

0.0000441

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000227

ExAC

AF:

0.0000330

AC:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

RFT1 related CDG

Uncertain:1

Jun 20, 2018

Clinical Genetics Laboratory, Christian Medical College, Vellore

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant has been found in heterozygous state previously at low frequency in healthy individuals of ExAC[0.00003/4], 1000Genome[0.0002/1] and inhouse database[2 individuals] and never in homozygous state. This variant lies in the transmembrane helical domain. insilico analyses tools predicted this variant as follow SIFT-damaging PROVEAN-deleterious POLYPHEN-probably damaging MUTATION TASTER- disease causing, unaffected Parents are heterozygous for the same variant -

RFT1-congenital disorder of glycosylation

Uncertain:1

Jan 15, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces glycine, which is neutral and non-polar, with serine, which is neutral and polar, at codon 340 of the RFT1 protein (p.Gly340Ser). This variant is present in population databases (rs568474177, gnomAD 0.02%). This missense change has been observed in individual(s) with clinical features of RFT1-congenital disorder of glycosylation (PMID: 30071302). ClinVar contains an entry for this variant (Variation ID: 545641). 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 RFT1 protein function with a negative predictive value of 80%. 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. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.26

BayesDel_addAF

Pathogenic

0.24

BayesDel_noAF

Pathogenic

0.39

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.58

D;D

Eigen

Pathogenic

0.76

Eigen_PC

Pathogenic

0.77

FATHMM_MKL

Uncertain

0.96

LIST_S2

Uncertain

0.95

D;D

M_CAP

Uncertain

0.20

MetaRNN

Pathogenic

0.89

D;D

MetaSVM

Uncertain

0.26

MutationAssessor

Uncertain

2.1

M;.

PrimateAI

Uncertain

0.56

PROVEAN

Pathogenic

-5.4

D;D

REVEL

Pathogenic

0.83

Sift

Pathogenic

0.0

D;D

Sift4G

Uncertain

0.021

D;D

Polyphen

1.0

D;D

Vest4

0.90

MVP

0.94

MPC

0.56

ClinPred

0.77

GERP RS

5.8

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.90

gMVP

0.80

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