17-17223948-C-T

Variant summary

Our verdict is Benign. Variant got -7 ACMG points: 0P and 7B. BP4_ModerateBP6BS2

The NM_144997.7(FLCN):c.592G>A(p.Asp198Asn) variant causes a missense change. The variant allele was found at a frequency of 0.000306 in 1,613,400 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. D198Y) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.00018 ( 1 hom., cov: 33)

Exomes 𝑓: 0.00032 ( 0 hom. )

Consequence

FLCN
NM_144997.7 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:3B:8O:1

Conservation

PhyloP100: 4.75

Variant links:

Genes affected

FLCN (HGNC:27310): (folliculin) This gene is located within the Smith-Magenis syndrome region on chromosome 17. Mutations in this gene are associated with Birt-Hogg-Dube syndrome, which is characterized by fibrofolliculomas, renal tumors, lung cysts, and pneumothorax. Alternative splicing of this gene results in two transcript variants encoding different isoforms. [provided by RefSeq, Jul 2008]

FLCN links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -7 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.12816778).

BP6

Variant 17-17223948-C-T is Benign according to our data. Variant chr17-17223948-C-T is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 134426.We mark this variant Likely_benign, oryginal submissions are: {Uncertain_significance=3, Likely_benign=4, Benign=2, not_provided=1}. Variant chr17-17223948-C-T is described in Lovd as [Likely_benign].

BS2

High AC in GnomAd at 28 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
FLCN	NM_144997.7 linkuse as main transcript	c.592G>A	p.Asp198Asn	missense_variant	6/14	ENST00000285071.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
FLCN	ENST00000285071.9 linkuse as main transcript	c.592G>A	p.Asp198Asn	missense_variant	6/14	1	NM_144997.7	P1	Q8NFG4-1
FLCN	ENST00000389169.9 linkuse as main transcript	c.592G>A	p.Asp198Asn	missense_variant	6/8	1			Q8NFG4-2
FLCN	ENST00000417064.1 linkuse as main transcript	c.433G>A	p.Asp145Asn	missense_variant	4/4	2
FLCN	ENST00000480316.1 linkuse as main transcript	n.558G>A		non_coding_transcript_exon_variant	1/3	2

Frequencies

GnomAD3 genomes

AF:

0.000184

AC:

AN:

152226

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000121

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000131

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000192

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000294

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000132

AC:

AN:

250092

Hom.:

AF XY:

0.000118

AC XY:

AN XY:

135540

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000109

Gnomad SAS exome

AF:

0.0000327

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000257

Gnomad OTH exome

AF:

0.000163

GnomAD4 exome

AF:

0.000319

AC:

466

AN:

1461056

Hom.:

Cov.:

AF XY:

0.000290

AC XY:

211

AN XY:

726838

show subpopulations

Gnomad4 AFR exome

AF:

0.000179

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.000101

Gnomad4 SAS exome

AF:

0.0000232

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000399

Gnomad4 OTH exome

AF:

0.000166

GnomAD4 genome

AF:

0.000184

AC:

AN:

152344

Hom.:

Cov.:

AF XY:

0.000161

AC XY:

AN XY:

74496

show subpopulations

Gnomad4 AFR

AF:

0.000120

Gnomad4 AMR

AF:

0.000131

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.000193

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000294

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000213

Hom.:

Bravo

AF:

0.000208

TwinsUK

AF:

0.000809

AC:

ALSPAC

AF:

0.000519

AC:

ExAC

AF:

0.000123

AC:

Asia WGS

AF:

0.000577

AC:

AN:

3478

EpiCase

AF:

0.000164

EpiControl

AF:

0.000296

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:3Benign:8Other:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:1Benign:3

Likely benign, no assertion criteria provided	clinical testing	Diagnostic Laboratory, Department of Genetics, University Medical Center Groningen	-	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Institute for Clinical Genetics, University Hospital TU Dresden, University Hospital TU Dresden	Nov 03, 2021	- -
Likely benign, no assertion criteria provided	clinical testing	Genome Diagnostics Laboratory, Amsterdam University Medical Center	-	- -
Likely benign, criteria provided, single submitter	clinical testing	GeneDx	Oct 05, 2020	This variant is associated with the following publications: (PMID: 24728327) -

not specified

Uncertain:1Other:1

not provided, no classification provided	reference population	ITMI	Sep 19, 2013	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Center for Genomic Medicine, Rigshospitalet, Copenhagen University Hospital	Aug 15, 2023	- -

Hereditary cancer-predisposing syndrome

Benign:2

Likely benign, criteria provided, single submitter	curation	Sema4, Sema4	Nov 11, 2020	- -
Benign, criteria provided, single submitter	clinical testing	Ambry Genetics	Feb 13, 2017	This alteration is classified as benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Birt-Hogg-Dube syndrome

Benign:2

Likely benign, criteria provided, single submitter	clinical testing	Invitae	Jan 25, 2024	- -
Benign, criteria provided, single submitter	clinical testing	Illumina Laboratory Services, Illumina	Jan 13, 2018	This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

Familial spontaneous pneumothorax

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 13, 2018

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. -

FLCN-related disorder

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

PreventionGenetics, part of Exact Sciences

Apr 13, 2023

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.098

BayesDel_addAF

Benign

-0.29

BayesDel_noAF

Benign

-0.35

Cadd

Benign

Dann

Uncertain

1.0

DEOGEN2

Benign

0.34

T;.;T

Eigen

Benign

-0.16

Eigen_PC

Benign

0.028

FATHMM_MKL

Uncertain

0.94

LIST_S2

Benign

0.84

T;T;T

M_CAP

Benign

0.041

MetaRNN

Benign

0.13

T;T;T

MetaSVM

Benign

-0.45

MutationAssessor

Benign

0.55

N;N;.

MutationTaster

Benign

0.99

D;D

PrimateAI

Uncertain

0.55

PROVEAN

Benign

-0.44

N;N;N

REVEL

Benign

0.22

Sift

Benign

0.24

T;T;T

Sift4G

Benign

0.26

T;T;T

Polyphen

0.0010

B;P;.

Vest4

0.33

MVP

0.37

MPC

0.36

ClinPred

0.070

GERP RS

4.8

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.20

gMVP

0.40

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

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