rs1064797186

chr14-28767964-A-C

Variant summary

Our verdict is Pathogenic. Variant got 19 ACMG points: 19P and 0B. PM1 PM2 PM5 PP2 PP3_Strong PP5_Very_Strong

The NM_005249.5(FOXG1):c.685A>C(p.Ile229Leu) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. I229K) has been classified as Likely pathogenic.

• Frequency: Genomes: not found (cov: 32)
• Consequence: FOXG1 NM_005249.5 missense
• Clinical Significance: Likely pathogenic reviewed by expert panel P:2 U:1
• Conservation: PhyloP100: 7.39

Genes affected

FOXG1 (HGNC:3811): (forkhead box G1) This locus encodes a member of the fork-head transcription factor family. The encoded protein, which functions as a transcriptional repressor, is highly expressed in neural tissues during brain development. Mutations at this locus have been associated with Rett syndrome and a diverse spectrum of neurodevelopmental disorders defined as part of the FOXG1 syndrome. This gene is disregulated in many types of cancer and is the target of multiple microRNAs that regulate the proliferation of tumor cells. [provided by RefSeq, Jul 2020]

LINC01551 (HGNC:19828): (long intergenic non-protein coding RNA 1551)

ACMG classification

Verdict is Pathogenic. Variant got 19 ACMG points.

• PM1: In a hotspot region, there are 12 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 3 uncertain in NM_005249.5
• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr14-28767965-TC-AA is described in ClinVar as [Likely_pathogenic]. Clinvar id is 1077133.Status of the report is criteria_provided_single_submitter, 1 stars.
• PP2: Missense variant where missense usually causes diseases, FOXG1
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.948
• PP5: Variant 14-28767964-A-C is Pathogenic according to our data. Variant chr14-28767964-A-C is described in ClinVar as [Likely_pathogenic]. Clinvar id is 425040.Status of the report is reviewed_by_expert_panel, 3 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
FOXG1	NM_005249.5	c.685A>C	p.Ile229Leu	missense_variant	1/1	ENST00000313071.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
FOXG1	ENST00000313071.7	c.685A>C	p.Ile229Leu	missense_variant	1/1		NM_005249.5	P1
FOXG1	ENST00000706482.1	c.685A>C	p.Ile229Leu	missense_variant	2/2			P1
LINC01551	ENST00000675861.1	n.374+1951A>C		intron_variant, non_coding_transcript_variant

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 34

GnomAD4 genome Cov.: 32

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:2 Uncertain:1

Revision: reviewed by expert panel

Submissions by phenotype

FOXG1 disorder Pathogenic:1

Likely pathogenic, reviewed by expert panel

curation

ClinGen Rett and Angelman-like Disorders Variant Curation Expert Panel

Feb 18, 2022

The p.Ile229Leu variant occurs in the well-characterized Forkhead functional domain of the FOXG1 gene (PMID 18571142, 28661489) (PM1). The p.Ile229Leu variant in FOXG1 occurs in the de novo state (biological parentage unconfirmed) in an individual with intellectual disability and seizures (Genetic Services Laboratory, University of Chicago internal data)(PM6). Computational prediction analysis tools suggests a deleterious impact; however, this information does not predict clinical significance (PP3). The p.Ile229Leu variant in FOXG1 is absent in gnomAD (PM2_supporting). In summary, the p.Ile229Leu variant in FOXG1 is classified as likely pathogenic for FOXG1 disorder based on the ACMG/AMP criteria (PM1, PM6, PP3, PM2_supporting). -

Rett syndrome, congenital variant Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

Genetic Services Laboratory, University of Chicago

Aug 09, 2016

- -

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

CeGaT Center for Human Genetics Tuebingen

Jan 01, 2017

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.36	D
BayesDel_noAF	Pathogenic	0.28
Cadd	Pathogenic	34
Dann	Uncertain	0.99
DEOGEN2	Pathogenic	0.91	D
Eigen	Uncertain	0.63
Eigen_PC	Uncertain	0.55
FATHMM_MKL	Uncertain	0.90	D
LIST_S2	Uncertain	0.87	D
M_CAP	Pathogenic	0.70	D
MetaRNN	Pathogenic	0.95	D
MetaSVM	Pathogenic	1.1	D
MutationAssessor	Uncertain	2.7	M
MutationTaster	Benign	1.0	D;D
PrimateAI	Uncertain	0.78	T
PROVEAN	Benign	-1.8	N
REVEL	Pathogenic	0.89
Sift	Pathogenic	0.0	D
Sift4G	Pathogenic	0.0	D
Polyphen		1.0	D
Vest4		0.73
MutPred		0.79		Gain of catalytic residue at N232 (P = 0.0168);
MVP		0.99
ClinPred		0.99	D
GERP RS		4.0
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		2.7
Varity_R		0.95
gMVP		1.0

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

Other links and lift over

dbSNP: rs1064797186; hg19: chr14-29237170;