17-44349166-T-C

Position:

chr17-44349166-T-C

Variant summary

Our verdict is Pathogenic. Variant got 14 ACMG points: 14P and 0B. PVS1PS1_ModeratePM2PP5_Moderate

The NM_002087.4(GRN):c.2T>C(p.Met1?) variant causes a start lost change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,461,750 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: 33)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

GRN
NM_002087.4 start_lost

Scores

Clinical Significance

Pathogenic criteria provided, single submitter P:2O:1

Conservation

PhyloP100: 1.28

Variant links:

Genes affected

GRN (HGNC:4601): (granulin precursor) Granulins are a family of secreted, glycosylated peptides that are cleaved from a single precursor protein with 7.5 repeats of a highly conserved 12-cysteine granulin/epithelin motif. The 88 kDa precursor protein, progranulin, is also called proepithelin and PC cell-derived growth factor. Cleavage of the signal peptide produces mature granulin which can be further cleaved into a variety of active, 6 kDa peptides. These smaller cleavage products are named granulin A, granulin B, granulin C, etc. Epithelins 1 and 2 are synonymous with granulins A and B, respectively. Both the peptides and intact granulin protein regulate cell growth. However, different members of the granulin protein family may act as inhibitors, stimulators, or have dual actions on cell growth. Granulin family members are important in normal development, wound healing, and tumorigenesis. [provided by RefSeq, Jul 2008]

GRN links:

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ACMG classification

Classification made for transcript

Verdict is Pathogenic. Variant got 14 ACMG points.

PVS1

Start lost variant, no new inframe start found.

PS1

Another start lost variant in NM_002087.4 (GRN) was described as [Pathogenic] in Lovd

PM2

Very rare variant in population databases, with high coverage;

PP5

Variant 17-44349166-T-C is Pathogenic according to our data. Variant chr17-44349166-T-C is described in ClinVar as [Pathogenic]. Clinvar id is 16008.Status of the report is criteria_provided_single_submitter, 1 stars. Variant chr17-44349166-T-C is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
GRN	NM_002087.4 linkuse as main transcript	c.2T>C	p.Met1?	start_lost	2/13	ENST00000053867.8	NP_002078.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
GRN	ENST00000053867.8 linkuse as main transcript	c.2T>C	p.Met1?	start_lost	2/13	1	NM_002087.4	ENSP00000053867	P1	P28799-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.00000796

AC:

AN:

251208

Hom.:

AF XY:

0.00000736

AC XY:

AN XY:

135810

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:

0.0000327

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000880

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000137

AC:

AN:

1461750

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

727192

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:

0.0000116

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

8.99e-7

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

ExAC

AF:

0.00000824

AC:

EpiCase

AF:

0.00

EpiControl

AF:

0.0000593

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:2Other:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

GRN-related frontotemporal lobar degeneration with Tdp43 inclusions;C3539123:Neuronal ceroid lipofuscinosis 11

Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Feb 22, 2023

This sequence change affects the initiator methionine of the GRN mRNA. The next in-frame methionine is located at codon 142. This variant is present in population databases (rs63751006, gnomAD 0.003%). Disruption of the initiator codon has been observed in individuals with frontotemporal dementia (PMID: 16862115, 16862116, 18245784, 21482928, 23609919, 28543767). ClinVar contains an entry for this variant (Variation ID: 16008). Algorithms developed to predict the effect of variants on protein structure and function are not available or were not evaluated for this variant. Experimental studies have shown that disruption of the initiator codon affects GRN function (PMID: 16862116). For these reasons, this variant has been classified as Pathogenic. -

GRN-related frontotemporal lobar degeneration with Tdp43 inclusions

Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

OMIM

Aug 24, 2006

- -

not provided

Other:1

not provided, no classification provided

literature only

VIB Department of Molecular Genetics, University of Antwerp

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Pathogenic

0.56

BayesDel_noAF

Pathogenic

0.28

CADD

Uncertain

DANN

Uncertain

0.99

DEOGEN2

Uncertain

0.50

D;.;T;.;T;.;.;T;T;T;T;T;.

Eigen

Uncertain

0.48

Eigen_PC

Uncertain

0.46

FATHMM_MKL

Benign

0.66

LIST_S2

Uncertain

0.90

D;D;D;D;D;D;D;D;D;D;D;D;D

M_CAP

Pathogenic

0.89

MetaRNN

Pathogenic

0.99

D;D;D;D;D;D;D;D;D;D;D;D;D

MetaSVM

Uncertain

0.36

MutationTaster

Benign

1.0

A;A

PROVEAN

Benign

-2.3

N;.;.;.;.;.;.;.;.;.;.;.;.

REVEL

Pathogenic

0.79

Sift

Uncertain

0.0010

D;.;.;.;.;.;.;.;.;.;.;.;.

Sift4G

Uncertain

0.0030

D;D;D;D;D;D;D;D;D;D;D;D;.

Polyphen

1.0

D;.;.;.;.;.;.;.;.;.;.;.;.

Vest4

0.92

MutPred

0.95

Gain of catalytic residue at M1 (P = 0.0107);Gain of catalytic residue at M1 (P = 0.0107);Gain of catalytic residue at M1 (P = 0.0107);Gain of catalytic residue at M1 (P = 0.0107);Gain of catalytic residue at M1 (P = 0.0107);Gain of catalytic residue at M1 (P = 0.0107);Gain of catalytic residue at M1 (P = 0.0107);Gain of catalytic residue at M1 (P = 0.0107);Gain of catalytic residue at M1 (P = 0.0107);Gain of catalytic residue at M1 (P = 0.0107);Gain of catalytic residue at M1 (P = 0.0107);Gain of catalytic residue at M1 (P = 0.0107);Gain of catalytic residue at M1 (P = 0.0107);

MVP

1.0

ClinPred

0.96

GERP RS

4.7

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.64

gMVP

0.77

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.060

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