rs765721225

Variant summary

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

The NM_022464.5(SIL1):c.991C>T(p.Arg331Cys) variant causes a missense change. The variant allele was found at a frequency of 0.0000199 in 1,609,598 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 (★★). Synonymous variant affecting the same amino acid position (i.e. R331R) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000021 ( 0 hom. )

Consequence

SIL1
NM_022464.5 missense

Scores

Clinical Significance

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

Conservation

PhyloP100: 6.80

Variant links:

Genes affected

SIL1 (HGNC:24624): (SIL1 nucleotide exchange factor) This gene encodes a resident endoplasmic reticulum (ER), N-linked glycoprotein with an N-terminal ER targeting sequence, 2 putative N-glycosylation sites, and a C-terminal ER retention signal. This protein functions as a nucleotide exchange factor for another unfolded protein response protein. Mutations in this gene have been associated with Marinesco-Sjogren syndrome. Alternate transcriptional splice variants have been characterized. [provided by RefSeq, Jul 2008]

SIL1 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, 0.917

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SIL1	NM_022464.5 linkuse as main transcript	c.991C>T	p.Arg331Cys	missense_variant	9/10	ENST00000394817.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris
SIL1	ENST00000394817.7 linkuse as main transcript	c.991C>T	p.Arg331Cys	missense_variant	9/10	1	NM_022464.5	P1
SIL1	ENST00000509534.5 linkuse as main transcript	c.1012C>T	p.Arg338Cys	missense_variant	10/11	5
SIL1	ENST00000265195.9 linkuse as main transcript	c.991C>T	p.Arg331Cys	missense_variant	10/11	5		P1
SIL1	ENST00000515008.1 linkuse as main transcript	n.326C>T		non_coding_transcript_exon_variant	3/4	3

Frequencies

GnomAD3 genomes

AF:

0.0000131

AC:

AN:

152242

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:

0.00

Gnomad FIN

AF:

0.0000941

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000500

AC:

AN:

240020

Hom.:

AF XY:

0.0000538

AC XY:

AN XY:

130024

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000277

Gnomad SAS exome

AF:

0.0000687

Gnomad FIN exome

AF:

0.0000500

Gnomad NFE exome

AF:

0.0000277

Gnomad OTH exome

AF:

0.000170

GnomAD4 exome

AF:

0.0000206

AC:

AN:

1457356

Hom.:

Cov.:

AF XY:

0.0000207

AC XY:

AN XY:

724452

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.000101

Gnomad4 SAS exome

AF:

0.0000235

Gnomad4 FIN exome

AF:

0.0000189

Gnomad4 NFE exome

AF:

0.0000171

Gnomad4 OTH exome

AF:

0.0000664

GnomAD4 genome

AF:

0.0000131

AC:

AN:

152242

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74368

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:

0.00

Gnomad4 FIN

AF:

0.0000941

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000564

Hom.:

Bravo

AF:

0.0000151

ExAC

AF:

0.0000577

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Athena Diagnostics

Jul 20, 2017

- -

Inborn genetic diseases

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Dec 17, 2023

The c.991C>T (p.R331C) alteration is located in exon 9 (coding exon 8) of the SIL1 gene. This alteration results from a C to T substitution at nucleotide position 991, causing the arginine (R) at amino acid position 331 to be replaced by a cysteine (C). 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

Pathogenic

0.84

BayesDel_addAF

Uncertain

0.088

BayesDel_noAF

Pathogenic

0.18

Cadd

Pathogenic

Dann

Uncertain

1.0

DEOGEN2

Pathogenic

0.84

D;D;.

Eigen

Uncertain

0.45

Eigen_PC

Uncertain

0.39

FATHMM_MKL

Uncertain

0.96

M_CAP

Uncertain

0.14

MetaRNN

Pathogenic

0.92

D;D;D

MetaSVM

Benign

-0.38

MutationAssessor

Uncertain

2.4

M;M;.

MutationTaster

Benign

1.0

D;D;D

PrimateAI

Uncertain

0.67

PROVEAN

Pathogenic

-5.9

D;D;D

REVEL

Uncertain

0.57

Sift

Pathogenic

0.0

D;D;D

Sift4G

Pathogenic

0.0010

D;D;D

Polyphen

1.0

D;D;D

Vest4

0.98

MutPred

0.75

.;.;Gain of catalytic residue at V340 (P = 0.0405);

MVP

0.56

MPC

1.0

ClinPred

0.86

GERP RS

5.2

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.65

gMVP

0.63

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