FLCN

protein-coding

folliculin, the group of DENN domain containing

Gene summary

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]

MANE transcript

NM_144997.7

Inheritance

AD

ClinVar variants

P:468U:1116B:759

Top phenotype

Birt-Hogg-Dube syndrome 1; Pneumothorax, primary spontaneous

gnomAD constraint

pLI —, LoF o/e 0.18

Max pathogenic AF

—

Genomic locus

chr17:17,212,212-17,237,188

External References & Databases

Transcript & Mutation Effects

hg38 • Region Span ~25.0 kb
Loading mutation effect viewer...

GenCC Phenotypes & Disease Associations

Curated gene-disease validity assertions and inheritance patterns

familial spontaneous pneumothoraxSTRONG

Inheritance Pattern: AD

Disease ID:MONDO:0008259

Submitter: Genomics England PanelApp

Birt-Hogg-Dube syndromeSUPPORTIVE

Inheritance Pattern: AD

Disease ID:MONDO:0007607

Submitter: Orphanet

familial spontaneous pneumothoraxSUPPORTIVE

Inheritance Pattern: AD

Disease ID:MONDO:0008259

Submitter: Orphanet

Birt-Hogg-Dube syndromeSTRONG

Inheritance Pattern: AD

Disease ID:MONDO:0007607

Submitter: Genomics England PanelApp

renal carcinomaSTRONG

Inheritance Pattern: AD

Disease ID:MONDO:0005206

Submitter: Genomics England PanelApp

Birt-Hogg-Dube syndrome 1DEFINITIVE

Inheritance Pattern: AD

Disease ID:MONDO:0800445

Submitter: G2P

Birt-Hogg-Dube syndromeDEFINITIVE

Inheritance Pattern: AD

Disease ID:MONDO:0007607

Submitter: ClinGen

There has been sufficient amount of evidence published associating the FLCN gene with Birt-Hogg-Dube syndrome (BHD) since the gene-disease relationship was first proposed by Nickerson et al. (2002). Plenty of case level studies have been performed with BHD patients that have variants in the FLCN gene. FCLN, which is expressed in skin, lung, and kidney, acts as a general tumor suppressor in human RCC cells in vivo. Knockdown of FLCN in ACHN cells led to the formation of significantly larger tumors and reintroduction of FLCN in 786-0 cells led to a strong decrease in tumor growth. Flcn+/- mice display preneoplastic kidney lesions and tumors and a Nihon rat model of inherited renal cancer with an intragenic Flcn mutation was also established. All of these evidences suggest a definitive relationship between the FLCN gene and Birt-Hogg-Dube syndrome (BHD).

Birt-Hogg-Dube syndrome 1DEFINITIVE

Inheritance Pattern: AD

Disease ID:MONDO:0800445

Submitter: Ambry Genetics

colorectal cancerLIMITED

Inheritance Pattern: AD

Disease ID:MONDO:0005575

Submitter: Ambry Genetics

familial spontaneous pneumothoraxMODERATE

Inheritance Pattern: AD

Disease ID:MONDO:0008259

Submitter: Ambry Genetics

Birt-Hogg-Dube syndromeSTRONG

Inheritance Pattern: AD

Disease ID:MONDO:0007607

Submitter: Labcorp Genetics (formerly Invitae)

Birt-Hogg-Dube syndromeSTRONG

Inheritance Pattern: AD

Disease ID:MONDO:0800444

Submitter: PanelApp Australia

Clinical Genomic Database (CGD)

Birt-Hogg-Dube syndrome 1; Pneumothorax, primary spontaneousAD

Manifestation: Dermatologic; Oncologic; Pulmonary

Intervention: Oncologic; Pulmonary

Rationale: Individuals are at risk for a number of types of neoplasms, and surveillance and early diagnosis/treatment may be beneficial; Some individuals may demonstrate isolated pneumothorax, but may be at elevated risk for malignancies; Affected individuals commonly have recurrent pneumothoraces, and early pleurodesis may beneficial)

Refs: 596896; 10522666; 11533913; 12471204; 12204536; 15657874; 15852235; 17496196; 18505456; 18234728; 19320655; 20413710; 20618353; 22146830; 23264078; 23414156; 23542717; 23715758; 23846428; 23995526Source: CGD (NHGRI)

ClinVar Associated Diseases & Phenotypes

Reported disease conditions connected to FLCN variants in ClinVar

24 Conditions Cataloged
Birt-Hogg-Dube syndromeTotal: 2055
Hereditary cancer-predisposing syndromeTotal: 1682
Birt-Hogg-Dube syndrome 1Total: 637
not providedTotal: 506
Familial spontaneous pneumothoraxTotal: 228
Nonpapillary renal cell carcinomaTotal: 192
Colorectal cancerTotal: 187
not specifiedTotal: 186

ClinVar Variants & Pathogenicity by Type

Statistics based on transcript NM_144997.7. Only rare variants are included.

We include only reliable ClinVar variants with their consequences to MANE Select, MANE Plus Clinical transcripts, or transcripts with TSL equal to 1. Click a count to filter the variants table below.

Slight differences between displayed counts and ClinVar may occur due to a different transcript/consequence chosen by our variant effect predictor, or because we classify Benign/Likely benign as Likely benign and Pathogenic/Likely pathogenic as Likely pathogenic.

EffectPLPVUSLBBSum
synonymous
5
clinvar
2
clinvar
7
clinvar
583
clinvar
25
clinvar
622
missense
17
clinvar
19
clinvar
1097
clinvar
147
clinvar
2
clinvar
1282
nonsense
78
clinvar
12
clinvar
4
clinvar
94
start loss
3
clinvar
3
clinvar
6
frameshift
220
clinvar
42
clinvar
6
clinvar
1
clinvar
269
splice donor/acceptor (+/-2bp)
22
clinvar
45
clinvar
2
clinvar
1
clinvar
70
Total3451231116732272343

Highest pathogenic variant AF is 0.00006884336

Loading ClinVar variants...

Transcript Catalog

Annotated transcript isoforms across RefSeq and Ensembl databases

Showing 4 of 95 transcripts
Transcript IDSourceProtein IDCoding ExonsMANE Status
NM_144997.7RefSeqNP_659434.211MANE Select
ENST00000285071.9EnsemblENSP00000285071.411MANE Select
NM_001353229.2RefSeqNP_001340158.112Standard
NM_001353230.2RefSeqNP_001340159.111Standard

Model Organisms & Knockout Phenotypes

Observed phenotypic effects in mouse and zebrafish models

Gene / ModelOrganismObserved Phenotype
flcnDanio rerio

Structure: post-vent region

Quality: bent

abnormal

Gene Ontology (GO) Annotations & Pathways

Biological processes, molecular functions, cellular components and pathways

Pathways ConsensusPathDB

  • mTOR signaling pathway - Homo sapiens (human)
  • Renal cell carcinoma - Homo sapiens (human)

Biological Process

  • negative regulation of transcription by RNA polymerase II
  • in utero embryonic development
  • regulation of protein phosphorylation
  • positive regulation of protein phosphorylation
  • cell-cell junction assembly

Molecular Function

  • guanyl-nucleotide exchange factor activity
  • protein binding
  • protein-containing complex binding

Cellular Component

  • nucleus
  • cytoplasm
  • lysosome
  • cytosol
  • plasma membrane

gnomAD Constraint

Source: gnomAD

Gene type
protein_coding
Transcript type
protein_coding
Transcript
ENST00000285071
Coding exons
11
Length
24977
Individuals with no LoFs
125723
Homozygous LoFs
0
Heterozygous LoFs
25
Defined
125748
p
0.0000994
Z-ScoreObservedExpectedObserved/ExpectedMutation RateTotal Possible
Missense1.132933530.8310.00002453818
Missense (PolyPhen)5081.8570.61082910
Synonymous-0.9171631491.100.00001141132
Loss of Function3.94527.10.1840.00000135293

Population LoF Frequency

PopulationCAFp-valueStatus
African00.0absent
Latino/Admixed American0.0000290.000029rare
Ashkenazi Jewish00.0absent
East Asian0.000270.00027rare
Finnish00.0absent
European (Non-Finnish)0.000120.00012rare
South Asian0.000130.00013rare
Other0.000160.00016rare

dbNSFP Gene Annotations

Source: dbNSFP

Function
FUNCTION: May be a tumor suppressor. May be involved in energy and/or nutrient sensing through the AMPK and mTOR signaling pathways. May regulate phosphorylation of RPS6KB1. {ECO:0000269|PubMed:12204536, ECO:0000269|PubMed:17028174, ECO:0000269|PubMed:18663353}.;
Disease
DISEASE: Birt-Hogg-Dube syndrome (BHD) [MIM:135150]: A rare autosomal dominant genodermatosis characterized by hair follicle hamartomas (fibrofolliculomas), kidney tumors, and spontaneous pneumothorax. Fibrofolliculomas are part of the triad of Birt- Hogg-Dube syndrome skin lesions that also includes trichodiscomas and acrochordons. Onset of this dermatologic condition is invariably in adulthood. Birt-Hogg-Dube syndrome is associated with a variety of histologic types of renal tumors, including chromophobe renal cell carcinoma (RCC), benign renal oncocytoma, clear-cell RCC and papillary type I RCC. Multiple lipomas, angiolipomas, and parathyroid adenomas are also seen in Birt-Hogg- Dube syndrome patients. {ECO:0000269|PubMed:12204536, ECO:0000269|PubMed:15852235, ECO:0000269|PubMed:18234728, ECO:0000269|PubMed:19785621}. Note=The disease is caused by mutations affecting the gene represented in this entry.; DISEASE: Primary spontaneous pneumothorax (PSP) [MIM:173600]: Condition in which air is present in the pleural space in the absence of a precipitating event, such as trauma or lung disease. This results in secondary collapse of the lung, either partially or completely, and some degree of hypoxia. PSP is relatively common, with an incidence between 7.4-18/100'000 for men and 1.2- 6/100'000 for women and a dose-dependent, increased risk among smokers. Most cases are sporadic, typically occurring in tall, thin men aged 10-30 years and generally while at rest. Familial PSP is rarer and usually is inherited as an autosomal dominant condition with reduced penetrance, although X-linked recessive and autosomal recessive inheritance have also been suggested. {ECO:0000269|PubMed:15657874, ECO:0000269|PubMed:18505456, ECO:0000269|PubMed:18579543}. Note=The disease is caused by mutations affecting the gene represented in this entry.; DISEASE: Renal cell carcinoma (RCC) [MIM:144700]: Renal cell carcinoma is a heterogeneous group of sporadic or hereditary carcinoma derived from cells of the proximal renal tubular epithelium. It is subclassified into clear cell renal carcinoma (non-papillary carcinoma), papillary renal cell carcinoma, chromophobe renal cell carcinoma, collecting duct carcinoma with medullary carcinoma of the kidney, and unclassified renal cell carcinoma. Clear cell renal cell carcinoma is the most common subtype. {ECO:0000269|PubMed:18794106}. Note=The gene represented in this entry may be involved in disease pathogenesis.;

Recessive Scores

pRec
0.172

Intolerance Scores

LoFtool
0.0936
RVIS EVS
-0.2
RVIS percentile EVS
39.17

Essentials

Essential (CRISPR)
N
Essential (CRISPR2)
S
Essential (gene trap)
N
Indispensability pred.
N
Indispensability score
0.276

Gene Damage Prediction

AllRecessiveDominant
MendelianMediumMediumMedium
Primary ImmunodeficiencyMediumMediumMedium
CancerMediumMediumMedium
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