7-114534647-C-G

Position:

• chr7-114534647-C-G

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_014491.4(FOXP2):​c.199C>G​(p.Gln67Glu) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: FOXP2 NM_014491.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.16

Genes affected

FOXP2 (HGNC:13875): (forkhead box P2) This gene encodes a member of the forkhead/winged-helix (FOX) family of transcription factors. It is expressed in fetal and adult brain as well as in several other organs such as the lung and gut. The protein product contains a FOX DNA-binding domain and a large polyglutamine tract and is an evolutionarily conserved transcription factor, which may bind directly to approximately 300 to 400 gene promoters in the human genome to regulate the expression of a variety of genes. This gene is required for proper development of speech and language regions of the brain during embryogenesis, and may be involved in a variety of biological pathways and cascades that may ultimately influence language development. Mutations in this gene cause speech-language disorder 1 (SPCH1), also known as autosomal dominant speech and language disorder with orofacial dyspraxia. Multiple alternative transcripts encoding different isoforms have been identified in this gene.[provided by RefSeq, Feb 2010]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
FOXP2	NM_014491.4	c.199C>G	p.Gln67Glu	missense_variant	3/17	ENST00000350908.9	NP_055306.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
FOXP2	ENST00000350908.9	c.199C>G	p.Gln67Glu	missense_variant	3/17	1	NM_014491.4	ENSP00000265436.7

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Childhood apraxia of speech 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. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.16
BayesDel_addAF	Uncertain	0.060	T
BayesDel_noAF	Benign	-0.15
CADD	Uncertain	24
DANN	Uncertain	0.99
DEOGEN2	Benign	0.11	T;T;.;D;.;.;D;T;.;T;.;.;T
Eigen	Uncertain	0.60
Eigen_PC	Uncertain	0.63
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Uncertain	0.88	D;D;D;.;D;D;D;D;D;D;D;D;D
M_CAP	Benign	0.033	D
MetaRNN	Uncertain	0.45	T;T;T;T;T;T;T;T;T;T;T;T;T
MetaSVM	Uncertain	0.070	D
MutationAssessor	Benign	1.3	.;.;.;L;L;L;L;.;L;.;L;.;.
PrimateAI	Pathogenic	0.82	D
PROVEAN	Benign	-1.1	.;.;.;N;N;N;N;N;N;.;N;N;N
REVEL	Benign	0.15
Sift	Uncertain	0.0010	.;.;.;D;D;D;D;D;D;.;D;D;D
Sift4G	Uncertain	0.0080	D;D;T;D;D;T;D;D;T;D;D;T;D
Polyphen		0.48, 0.95, 0.59, 0.81	.;.;.;P;.;P;P;.;.;.;P;.;P
Vest4		0.64
MutPred		0.26		Loss of MoRF binding (P = 0.0283);Loss of MoRF binding (P = 0.0283);Loss of MoRF binding (P = 0.0283);Loss of MoRF binding (P = 0.0283);Loss of MoRF binding (P = 0.0283);Loss of MoRF binding (P = 0.0283);Loss of MoRF binding (P = 0.0283);Loss of MoRF binding (P = 0.0283);Loss of MoRF binding (P = 0.0283);Loss of MoRF binding (P = 0.0283);Loss of MoRF binding (P = 0.0283);Loss of MoRF binding (P = 0.0283);.;
MVP		0.71
MPC		0.32
ClinPred		0.97	D
GERP RS		5.0
Varity_R		0.56
gMVP		0.50

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: rs759949520; hg19: chr7-114174702;