3-138946068-G-C

Variant names:

• chr3-138946068-G-C
• rs104893741
• NM_023067.4:c.655C>G

Variant summary

Our verdict is Likely pathogenic. The variant received 6 ACMG points: 6P and 0B. PM1 PM2 PP2 PP3

The NM_023067.4(FOXL2):​c.655C>G​(p.Gln219Glu) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. Q219L) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: FOXL2 NM_023067.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 5.15
• Publications: 0 publications found

Genes affected

FOXL2 (HGNC:1092): (forkhead box L2) This gene encodes a forkhead transcription factor. The protein contains a fork-head DNA-binding domain and may play a role in ovarian development and function. Expansion of a polyalanine repeat region and other mutations in this gene are a cause of blepharophimosis syndrome and premature ovarian failure 3. [provided by RefSeq, Jul 2016]

FOXL2 Gene-Disease associations (from GenCC):

• blepharophimosis, ptosis, and epicanthus inversus syndrome

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae), G2P
• premature ovarian failure 3

  Inheritance: Unknown Classification: LIMITED Submitted by: Labcorp Genetics (formerly Invitae)

ACMG classification

Our verdict: Likely_pathogenic. The variant received 6 ACMG points.

• PM1: In a hotspot region, there are 2 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 4 uncertain in NM_023067.4
• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in the gene, where a lot of missense mutations are associated with disease in ClinVar. The gene has 31 curated pathogenic missense variants (we use a threshold of 10). The gene has 3 curated benign missense variants. Trascript score misZ: -0.80149 (below the threshold of 3.09). GenCC associations: The gene is linked to blepharophimosis, ptosis, and epicanthus inversus syndrome, premature ovarian failure 3.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.784

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
FOXL2	NM_023067.4	c.655C>G	p.Gln219Glu	missense_variant	Exon 1 of 1	ENST00000648323.1	NP_075555.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
FOXL2	ENST00000648323.1	c.655C>G	p.Gln219Glu	missense_variant	Exon 1 of 1		NM_023067.4	ENSP00000497217.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.29
BayesDel_addAF	Uncertain	0.15	D
BayesDel_noAF	Uncertain	-0.030
CADD	Pathogenic	26
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.46	T;T
Eigen	Uncertain	0.54
Eigen_PC	Uncertain	0.50
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Benign	0.59	.;T
M_CAP	Pathogenic	0.92	D
MetaRNN	Pathogenic	0.78	D;D
MetaSVM	Pathogenic	0.80	D
MutationAssessor	Benign	1.9	L;L
PhyloP100		5.1
PrimateAI	Pathogenic	0.95	D
PROVEAN	Benign	-1.4	.;N
REVEL	Uncertain	0.57
Sift	Uncertain	0.0010	.;D
Sift4G	Benign	0.76	.;T
Polyphen		0.97	D;D
Vest4		0.36
MutPred		0.34		Gain of phosphorylation at S217 (P = 0.1064);Gain of phosphorylation at S217 (P = 0.1064);
MVP		0.86
ClinPred		0.92	D
GERP RS		3.6
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.31
gMVP		0.59
Mutation Taster		=64/36	polymorphism

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

Other links and lift over

dbSNP: rs104893741; hg19: chr3-138664910; COSMIC: COSV57725843; COSMIC: COSV57725843;