17-44349217-C-T

Position:

chr17-44349217-C-T

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 0P and 2B. BP4_Moderate

The NM_002087.4(GRN):c.53C>T(p.Thr18Met) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000905 in 1,613,992 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.000092 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000090 ( 0 hom. )

Consequence

GRN
NM_002087.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:4

Conservation

PhyloP100: 0.287

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:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.23551458).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
GRN	NM_002087.4 linkuse as main transcript	c.53C>T	p.Thr18Met	missense_variant	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.53C>T	p.Thr18Met	missense_variant	2/13	1	NM_002087.4	ENSP00000053867	P1	P28799-1

Frequencies

GnomAD3 genomes

AF:

0.0000920

AC:

AN:

152202

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000483

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000262

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:

0.000118

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000318

AC:

AN:

251246

Hom.:

AF XY:

0.0000147

AC XY:

AN XY:

135862

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000289

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:

0.0000528

Gnomad OTH exome

AF:

0.000163

GnomAD4 exome

AF:

0.0000903

AC:

132

AN:

1461672

Hom.:

Cov.:

AF XY:

0.0000756

AC XY:

AN XY:

727164

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.0000224

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:

0.000114

Gnomad4 OTH exome

AF:

0.0000497

GnomAD4 genome

AF:

0.0000919

AC:

AN:

152320

Hom.:

Cov.:

AF XY:

0.0000537

AC XY:

AN XY:

74496

show subpopulations

Gnomad4 AFR

AF:

0.0000481

Gnomad4 AMR

AF:

0.000261

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000118

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000102

Hom.:

Bravo

AF:

0.0000945

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000233

AC:

ExAC

AF:

0.0000330

AC:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:4

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

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

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jul 17, 2023	This sequence change replaces threonine, which is neutral and polar, with methionine, which is neutral and non-polar, at codon 18 of the GRN protein (p.Thr18Met). This variant is present in population databases (rs199572314, gnomAD 0.007%). This variant has not been reported in the literature in individuals affected with GRN-related conditions. ClinVar contains an entry for this variant (Variation ID: 451234). An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant is likely to be disruptive. 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. -
Uncertain significance, criteria provided, single submitter	clinical testing	Fulgent Genetics, Fulgent Genetics	Oct 31, 2018	- -

Inborn genetic diseases

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Nov 03, 2022

The c.53C>T (p.T18M) alteration is located in exon 2 (coding exon 1) of the GRN gene. This alteration results from a C to T substitution at nucleotide position 53, causing the threonine (T) at amino acid position 18 to be replaced by a methionine (M). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

GeneDx

Aug 15, 2017

The T18M variant in the GRN gene has not been reported previously as a pathogenic variant, nor as a benign variant, to our knowledge. This variant is observed in 1/16,508 (0.006%) alleles from individuals of South Asian background and in 3/66,590 (0.004%) alleles from individuals of non-Finnish European background in the ExAC dataset, with no homozygous control individuals reported (Lek et al., 2016). The T18M variant is a non-conservative amino acid substitution, which is likely to impact secondary protein structure as these residues differ in polarity, charge, size and/or other properties. In addition, this substitution occurs at a position that is conserved across mammalian species. However, in silico analysis is inconsistent in its predictions as to whether or not the variant is damaging to the protein structure/function. We interpret T18M as a variant of uncertain significance. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.11

BayesDel_addAF

Benign

-0.086

BayesDel_noAF

Benign

-0.18

CADD

Benign

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.46

T;.;T;.;T;.;.;T;T;T;T;T;.

Eigen

Benign

0.0064

Eigen_PC

Benign

-0.090

FATHMM_MKL

Benign

0.10

LIST_S2

Uncertain

0.91

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

M_CAP

Uncertain

0.14

MetaRNN

Benign

0.24

T;T;T;T;T;T;T;T;T;T;T;T;T

MetaSVM

Benign

-0.68

MutationAssessor

Uncertain

2.5

M;.;.;.;.;.;.;.;.;.;.;.;M

MutationTaster

Benign

0.99

N;N

PrimateAI

Benign

0.43

PROVEAN

Benign

-2.3

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

REVEL

Uncertain

0.32

Sift

Uncertain

0.0020

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

Sift4G

Benign

0.081

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

Polyphen

0.99

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

Vest4

0.55

MVP

0.89

MPC

0.75

ClinPred

0.28

GERP RS

2.7

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.067

gMVP

0.30

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