chr17-44352482-G-A

Position:

chr17-44352482-G-A

Variant summary

Our verdict is Likely benign. Variant got -3 ACMG points: 0P and 3B. BP4_ModerateBS1_Supporting

The NM_002087.4(GRN):c.1555G>A(p.Val519Met) 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 1,614,020 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.00039 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000059 ( 0 hom. )

Consequence

GRN
NM_002087.4 missense

Scores

Clinical Significance

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

Conservation

PhyloP100: 1.64

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 -3 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.23028314).

BS1

Variant frequency is greater than expected in population amr. gnomad4 allele frequency = 0.000394 (60/152278) while in subpopulation AMR AF= 0.00327 (50/15302). AF 95% confidence interval is 0.00255. There are 0 homozygotes in gnomad4. There are 27 alleles in male gnomad4 subpopulation. Median coverage is 33. This position pass quality control queck. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
GRN	NM_002087.4 linkuse as main transcript	c.1555G>A	p.Val519Met	missense_variant	12/13	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.1555G>A	p.Val519Met	missense_variant	12/13	1	NM_002087.4	ENSP00000053867	P1	P28799-1
GRN	ENST00000589265.5 linkuse as main transcript	c.1084G>A	p.Val362Met	missense_variant	8/9	5		ENSP00000467616
GRN	ENST00000586443.1 linkuse as main transcript	c.997G>A	p.Val333Met	missense_variant	7/7	3		ENSP00000465673
GRN	ENST00000586242.1 linkuse as main transcript	c.190G>A	p.Val64Met	missense_variant	2/3	3		ENSP00000467837

Frequencies

GnomAD3 genomes

AF:

0.000394

AC:

AN:

152160

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000965

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00327

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:

0.0000294

Gnomad OTH

AF:

0.00191

GnomAD3 exomes

AF:

0.000103

AC:

AN:

251372

Hom.:

AF XY:

0.000132

AC XY:

AN XY:

135872

show subpopulations

Gnomad AFR exome

AF:

0.0000615

Gnomad AMR exome

AF:

0.000463

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:

0.0000615

Gnomad OTH exome

AF:

0.000326

GnomAD4 exome

AF:

0.0000588

AC:

AN:

1461742

Hom.:

Cov.:

AF XY:

0.0000495

AC XY:

AN XY:

727164

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.000783

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000252

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000243

Gnomad4 OTH exome

AF:

0.000348

GnomAD4 genome

AF:

0.000394

AC:

AN:

152278

Hom.:

Cov.:

AF XY:

0.000363

AC XY:

AN XY:

74466

show subpopulations

Gnomad4 AFR

AF:

0.0000963

Gnomad4 AMR

AF:

0.00327

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000294

Gnomad4 OTH

AF:

0.00189

Alfa

AF:

0.0000676

Hom.:

Bravo

AF:

0.000831

ESP6500AA

AF:

0.000227

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.0000906

AC:

EpiCase

AF:

0.00

EpiControl

AF:

0.0000593

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	Dec 22, 2023	This sequence change replaces valine, which is neutral and non-polar, with methionine, which is neutral and non-polar, at codon 519 of the GRN protein (p.Val519Met). This variant is present in population databases (rs141111290, gnomAD 0.04%). This missense change has been observed in individual(s) with blindness or dementia (PMID: 22312439, 25333068, 29486463, 32483926). ClinVar contains an entry for this variant (Variation ID: 588635). 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 expected to disrupt GRN protein function with a positive 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. -
Uncertain significance, criteria provided, single submitter	clinical testing	Fulgent Genetics, Fulgent Genetics	Nov 07, 2021	- -

Inborn genetic diseases

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Nov 22, 2023

The c.1555G>A (p.V519M) alteration is located in exon 12 (coding exon 11) of the GRN gene. This alteration results from a G to A substitution at nucleotide position 1555, causing the valine (V) at amino acid position 519 to be replaced by a methionine (M). Based on data from gnomAD, the A allele has an overall frequency of 0.01% (26/251372) total alleles studied. The highest observed frequency was 0.046% (16/34582) of Latino alleles. This variant has been detected in cohorts of individuals with Alzheimer's disease and frontotemporal lobar degeneration; however, specific clinical information was not provided for the affected individuals (Cruchaga, 2012; Lee, 2014). This amino acid position is well conserved in available vertebrate species. The in silico prediction for this alteration is inconclusive. 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

May 22, 2023

Has been observed in individuals with dementia and reported as possibly related; however, this variant was also observed in unaffected control samples (Cruchaga et al., 2012; Blue et al., 2018); In silico analysis supports that this missense variant does not alter protein structure/function; This variant is associated with the following publications: (PMID: 25333068, 28527211, 29486463, 22312439, 32483926) -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.15

BayesDel_addAF

Benign

-0.18

BayesDel_noAF

Benign

-0.18

CADD

Benign

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.52

D;T

Eigen

Uncertain

0.36

Eigen_PC

Uncertain

0.26

FATHMM_MKL

Uncertain

0.87

LIST_S2

Benign

0.75

T;T

M_CAP

Uncertain

0.096

MetaRNN

Benign

0.23

T;T

MetaSVM

Uncertain

-0.12

MutationAssessor

Uncertain

2.1

M;.

MutationTaster

Benign

0.55

N;N

PrimateAI

Uncertain

0.49

PROVEAN

Uncertain

-2.4

N;.

REVEL

Uncertain

0.42

Sift

Uncertain

0.0020

D;.

Sift4G

Uncertain

0.0060

D;D

Polyphen

1.0

D;.

Vest4

0.52

MVP

0.79

MPC

0.84

ClinPred

0.18

GERP RS

4.3

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.14

gMVP

0.83

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