14-28767783-GGG-GT

Variant names:

• chr14-28767784-GG-T
• rs786205003
• NM_005249.5:c.505_506delGGinsT

Variant summary

Our verdict is Pathogenic. Variant got 23 ACMG points: 23P and 0B. PVS1 PS1 PM2 PP2 PP5_Very_Strong

The NM_005249.5(FOXG1):​c.505_506delGGinsT​(p.Gly169SerfsTer23) variant causes a frameshift, missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Pathogenic (★★). Another nucleotide change resulting in the same amino acid substitution has been previously reported as Pathogenic in Lovd.

• Frequency: Genomes: not found (cov: 32)
• Consequence: FOXG1 NM_005249.5 frameshift, missense
• Clinical Significance: Pathogenic criteria provided, multiple submitters, no conflicts P:4
• Conservation: PhyloP100: 7.73

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 23 ACMG points.

• PVS1: Loss of function variant, product does not undergo nonsense mediated mRNA decay. Variant is located in the 3'-most exon, not predicted to undergo nonsense mediated mRNA decay. There are 54 pathogenic variants in the truncated region.
• PS1: Transcript NM_005249.5 (FOXG1) is affected with MISSENSE_VARIANT having same AA change as one Pathogenic present in Lovd
• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in the FOXG1 gene, where missense mutations are typically associated with disease (based on misZ statistic). The gene has 90 curated pathogenic missense variants (we use a threshold of 10). The gene has 66 curated benign missense variants. Trascript score misZ: 3.7891 (above the threshold of 3.09). GenCC associations: The gene is linked to Rett syndrome, congenital variant, FOXG1 disorder.
• PP5: Variant 14-28767784-GG-T is Pathogenic according to our data. Variant chr14-28767784-GG-T is described in ClinVar as [Pathogenic]. Clinvar id is 189614.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
FOXG1	NM_005249.5	c.505_506delGGinsT	p.Gly169SerfsTer23	frameshift_variant, missense_variant	Exon 1 of 1	ENST00000313071.7	NP_005240.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
FOXG1	ENST00000313071.7	c.505_506delGGinsT	p.Gly169SerfsTer23	frameshift_variant, missense_variant	Exon 1 of 1	6	NM_005249.5	ENSP00000339004.3
FOXG1	ENST00000706482.1	c.505_506delGGinsT	p.Gly169SerfsTer23	frameshift_variant, missense_variant	Exon 2 of 2			ENSP00000516406.1
LINC01551	ENST00000675861.1	n.374+1771_374+1772delGGinsT		intron_variant	Intron 1 of 3

Frequencies

GnomAD3 genomes Cov.: 32

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:4

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Rett syndrome, congenital variant Pathogenic:3

Feb 08, 2013

Genetic Services Laboratory, University of Chicago

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Sep 26, 2011

RettBASE

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: curation

- -

Jan 20, 2018

Institute of Human Genetics, University of Leipzig Medical Center

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

FOXG1 disorder Pathogenic:1

May 08, 2024

Centre for Population Genomics, CPG

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: curation

This variant has been collected from RettBASE and curated to current modified ACMG/AMP criteria. Based on the classification scheme defined by the ClinGen Rett/Angelman-like Expert Panel for Rett/AS-like Disorders Specifications to the ACMG/AMP Variant Interpretation Guidelines VCEP 3.0, this variant is classified as pathogenic. At least the following criteria are met: Predicted to result in loss of function, and LOF is a known mechanism of disease (PVS1). This variant has been identified as a de novo occurrence in an individual with Rett syndrome with confirmed parental relationships (PS2, PMID: 21441262. This variant is absent from gnomAD v4.1 (PM2_Supporting). -

Computational scores

Source: dbNSFP v4.3

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Other links and lift over

dbSNP: rs786205003; hg19: chr14-29236990;