3-70977675-G-T

Variant names:

• chr3-70977675-G-T
• rs1057518926
• NM_001349338.3:c.1396C>A

Variant summary

Our verdict is Pathogenic. The variant received 12 ACMG points: 12P and 0B. PM1 PM2 PM5 PP3_Strong PP5_Moderate

The NM_001349338.3(FOXP1):​c.1396C>A​(p.Pro466Thr) 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. 13/22 in silico tools predict a damaging outcome for this variant. Variant has been reported in ClinVar as Pathogenic (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P466L) has been classified as Likely pathogenic.

• Frequency: Genomes: not found (cov: 32)
• Consequence: FOXP1 NM_001349338.3 missense
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications P:1 U:1
• Conservation: PhyloP100: 10.0
• Publications: 0 publications found

Genes affected

FOXP1 (HGNC:3823): (forkhead box P1) This gene belongs to subfamily P of the forkhead box (FOX) transcription factor family. Forkhead box transcription factors play important roles in the regulation of tissue- and cell type-specific gene transcription during both development and adulthood. Forkhead box P1 protein contains both DNA-binding- and protein-protein binding-domains. This gene may act as a tumor suppressor as it is lost in several tumor types and maps to a chromosomal region (3p14.1) reported to contain a tumor suppressor gene(s). Alternative splicing results in multiple transcript variants encoding different isoforms. [provided by RefSeq, Jul 2008]

FOXP1 Gene-Disease associations (from GenCC):

• intellectual disability-severe speech delay-mild dysmorphism syndrome

  Inheritance: AD Classification: DEFINITIVE, STRONG, MODERATE Submitted by: Illumina, G2P, ClinGen, Labcorp Genetics (formerly Invitae), Ambry Genetics
• congenital heart disease

  Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen

ENSG00000285708 (HGNC:):

ACMG classification

Our verdict: Pathogenic. The variant received 12 ACMG points.

• PM1: In a hotspot region, there are 5 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 1 benign, 3 uncertain in NM_001349338.3
• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr3-70977674-G-A is described in ClinVar as Likely_pathogenic. ClinVar VariationId is 3256796.Status of the report is no_assertion_criteria_provided, 0 stars.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.984
• PP5: Variant 3-70977675-G-T is Pathogenic according to our data. Variant chr3-70977675-G-T is described in ClinVar as Pathogenic. ClinVar VariationId is 1013484.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
FOXP1	NM_001349338.3	c.1396C>A	p.Pro466Thr	missense_variant	Exon 16 of 21	ENST00000649528.3	NP_001336267.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
FOXP1	ENST00000649528.3	c.1396C>A	p.Pro466Thr	missense_variant	Exon 16 of 21		NM_001349338.3	ENSP00000497369.1
ENSG00000285708	ENST00000647725.1	c.1396C>A	p.Pro466Thr	missense_variant	Exon 21 of 26			ENSP00000497585.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Pathogenic:1 Uncertain:1

Revision: criteria provided, conflicting classifications

Submissions by phenotype

not provided Pathogenic:1

Sep 01, 2020

CeGaT Center for Human Genetics Tuebingen

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Intellectual disability-severe speech delay-mild dysmorphism syndrome Uncertain:1

Feb 18, 2025

3billion

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The variant is not observed in the gnomAD v4.1.0 dataset. Predicted Consequence/Location: Missense variant In silico tool predictions suggest damaging effect of the variant on gene or gene product [REVEL: 0.83 (>=0.6, sensitivity 0.68 and specificity 0.92); 3Cnet: 0.99 (>=0.6, sensitivity 0.72 and precision 0.9)]. The same nucleotide change resulting in the same amino acid change has been previously reported to be associated with FOXP1-related disorder (ClinVar ID: VCV001013484).Different missense changes at the same codon (p.Pro466Ala, p.Pro466Leu) have been reported to be associated with FOXP1-related disorder (ClinVar ID: VCV000374144, VCV003256796). However the evidence of pathogenicity is insufficient at this time. Therefore, this variant is classified as VUS according to the recommendation of ACMG/AMP guideline.

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.58	D
BayesDel_noAF	Pathogenic	0.60
CADD	Pathogenic	30
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.99	D;.;D;.;D;.;.;.;.;.;.;.;D;.;.;.;.;D;.;.;D;.;.;.;.;.;.
Eigen	Pathogenic	1.2
Eigen_PC	Pathogenic	1.1
FATHMM_MKL	Pathogenic	1.0	D
LIST_S2	Benign	0.0	.;D;.;.;.;.;D;.;.;D;D;D;.;.;D;D;.;.;D;D;D;D;D;D;D;D;.
M_CAP	Pathogenic	0.86	D
MetaRNN	Pathogenic	0.98	D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D
MetaSVM	Pathogenic	0.98	D
MutationAssessor	Pathogenic	4.2	H;H;H;.;H;.;.;.;H;.;.;.;H;.;.;.;.;H;.;.;H;.;.;.;.;.;.
PhyloP100		10
PrimateAI	Pathogenic	0.89	D
PROVEAN	Pathogenic	-7.1	D;.;D;D;.;.;.;.;.;.;.;.;D;.;D;.;.;.;.;.;.;.;.;.;.;.;.
REVEL	Pathogenic	0.83
Sift	Pathogenic	0.0	D;.;D;D;.;.;.;.;.;.;.;.;D;.;D;.;.;.;.;.;.;.;.;.;.;.;.
Sift4G	Pathogenic	0.0010	D;D;D;D;.;.;.;.;.;.;.;.;D;.;D;.;.;.;.;.;.;.;.;.;.;.;.
Vest4		0.87
ClinPred		1.0	D
GERP RS		6.2
Varity_R		0.95
gMVP		0.98
Mutation Taster		=1/99	disease causing (ClinVar)

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: rs1057518926; hg19: chr3-71026826;