rs397514478

Positions:

• chr8-42856341-G-A

Variant summary

Our verdict is Pathogenic. Variant got 12 ACMG points: 12P and 0B. PM2 PP3_Moderate PP5_Very_Strong

The NM_030954.4(RNF170):​c.595C>T​(p.Arg199Cys) variant causes a missense change. The variant allele was found at a frequency of 0.00000139 in 1,439,842 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 Pathogenic (★★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: RNF170 NM_030954.4 missense
• Clinical Significance: Pathogenic criteria provided, single submitter P:2
• Conservation: PhyloP100: 5.16

Genes affected

RNF170 (HGNC:25358): (ring finger protein 170) This gene encodes a RING domain-containing protein that resides in the endoplasmic reticulum (ER) membrane. This protein functions as an E3 ubiquitin ligase and mediates ubiquitination and processing of inositol 1,4,5-trisphosphate (IP3) receptors via the ER-associated protein degradation pathway. It is recruited to the activated IP3 receptors by the ERLIN1/ERLIN2 complex to which it is constitutively bound. Mutations in this gene are associated with autosomal dominant sensory ataxia. Alternatively spliced transcript variants have been found for this gene. [provided by RefSeq, Jun 2012]

ACMG classification

Verdict is Pathogenic. Variant got 12 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.845
• PP5: Variant 8-42856341-G-A is Pathogenic according to our data. Variant chr8-42856341-G-A is described in ClinVar as [Pathogenic]. Clinvar id is 31590.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
RNF170	NM_030954.4	c.595C>T	p.Arg199Cys	missense_variant	7/7	ENST00000527424.6	NP_112216.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
RNF170	ENST00000527424.6	c.595C>T	p.Arg199Cys	missense_variant	7/7	1	NM_030954.4	ENSP00000434797	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD3 exomes AF: 0.00000439 AC: 1 AN: 227970 Hom.: 0 AF XY: 0.00000809 AC XY: 1 AN XY: 123644

Gnomad AFR exome AF: 0.0000634

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000139 AC: 2 AN: 1439842 Hom.: 0 Cov.: 31 AF XY: 0.00000140 AC XY: 1 AN XY: 715804

Gnomad4 AFR exome AF: 0.0000314

Gnomad4 AMR exome AF: 0.00

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: 9.04e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:2

Revision: criteria provided, single submitter

Submissions by phenotype

Autosomal dominant sensory ataxia 1 Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

OMIM

May 29, 2015

- -

Spastic paraplegia 85, autosomal recessive Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Mar 20, 2023

Variant summary: RNF170 c.595C>T (p.Arg199Cys) results in a non-conservative amino acid change in the encoded protein sequence. Four of five in-silico tools predict a damaging effect of the variant on protein function. The variant allele was found at a frequency of 4.4e-06 in 227970 control chromosomes (gnomAD). c.595C>T has been reported in the literature in multiple individuals affected with Autosomal dominant sensory ataxia and the variant segregated with the disease (example: Valdamins_2011 and Cortese_2020). These data indicate that the variant is very likely to be associated with disease. One submitter (OMIM) have provided clinical-significance assessments for this variant to ClinVar after 2014 and classified the variant as pathogenic. Based on the evidence outlined above, the variant was classified as pathogenic. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.95
BayesDel_addAF	Pathogenic	0.45	D
BayesDel_noAF	Pathogenic	0.41
CADD	Pathogenic	33
DANN	Uncertain	1.0
DEOGEN2	Benign	0.15	T;T;.
Eigen	Uncertain	0.65
Eigen_PC	Uncertain	0.64
FATHMM_MKL	Uncertain	0.95	D
LIST_S2	Uncertain	0.95	D;.;D
M_CAP	Uncertain	0.16	D
MetaRNN	Pathogenic	0.84	D;D;D
MetaSVM	Uncertain	0.68	D
MutationAssessor	Pathogenic	2.9	M;M;.
MutationTaster	Benign	1.0	D;D;D;D;D
PrimateAI	Pathogenic	0.79	T
PROVEAN	Pathogenic	-5.1	D;D;D
REVEL	Pathogenic	0.76
Sift	Pathogenic	0.0	D;D;T
Sift4G	Benign	0.067	T;T;T
Polyphen		0.99	D;D;.
Vest4		0.88
MutPred		0.51		Loss of solvent accessibility (P = 0.001);Loss of solvent accessibility (P = 0.001);.;
MVP		0.97
MPC		0.49
ClinPred		0.99	D
GERP RS		5.2
Varity_R		0.60
gMVP		0.91

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: rs397514478; hg19: chr8-42711484; COSMIC: COSV53566432; COSMIC: COSV53566432;