chr3-70977720-CTGCTGAA-C

Variant names:

• chr3-70977720-CTGCTGAA-C
• rs1135401796
• NM_001349338.3:c.1349-5_1350delTTCAGCA

Variant summary

Our verdict is Pathogenic. The variant received 12 ACMG points: 12P and 0B. PVS1 PM2 PP5_Moderate

The NM_001349338.3(FOXP1):​c.1349-5_1350delTTCAGCA​(p.Ala450fs) variant causes a frameshift, splice acceptor, splice region, intron 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 (★). Synonymous variant affecting the same amino acid position (i.e. A450A) has been classified as Pathogenic. Variant results in nonsense mediated mRNA decay.

• Frequency: Genomes: not found (cov: 32)
• Consequence: FOXP1 NM_001349338.3 frameshift, splice_acceptor, splice_region, intron
• Clinical Significance: Pathogenic criteria provided, single submitter P: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: G2P, Labcorp Genetics (formerly Invitae), Ambry Genetics, Illumina, ClinGen
• congenital heart disease

  Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen

ENSG00000285708 (HGNC:):

ACMG classification

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

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 3-70977720-CTGCTGAA-C is Pathogenic according to our data. Variant chr3-70977720-CTGCTGAA-C is described in ClinVar as Pathogenic. ClinVar VariationId is 431122.Status of the report is criteria_provided_single_submitter, 1 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001349338.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	FOXP1	NM_001349338.3	MANE Select	c.1349-5_1350delTTCAGCA	p.Ala450fs	frameshift splice_acceptor splice_region intron	Exon 16 of 21	NP_001336267.1	Q548T7
	FOXP1	NM_001244810.2		c.1349-5_1350delTTCAGCA	p.Ala450fs	frameshift splice_acceptor splice_region intron	Exon 16 of 21	NP_001231739.1	Q9H334-8
	FOXP1	NM_001244814.3		c.1349-5_1350delTTCAGCA	p.Ala450fs	frameshift splice_acceptor splice_region intron	Exon 12 of 17	NP_001231743.1	Q9H334-1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	FOXP1	ENST00000649528.3	MANE Select	c.1349-5_1350delTTCAGCA	p.Ala450fs	frameshift splice_acceptor splice_region intron	Exon 16 of 21	ENSP00000497369.1	Q9H334-1
	FOXP1	ENST00000318789.11	TSL:1	c.1349-5_1350delTTCAGCA	p.Ala450fs	frameshift splice_acceptor splice_region intron	Exon 16 of 21	ENSP00000318902.5	Q9H334-1
	ENSG00000285708	ENST00000647725.1		c.1349-5_1350delTTCAGCA	p.Ala450fs	frameshift splice_acceptor splice_region intron	Exon 21 of 26	ENSP00000497585.1

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

ClinVar submissions

Significance: Pathogenic

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
1	-	-	Intellectual disability-severe speech delay-mild dysmorphism syndrome (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		10
Mutation Taster		=0/200	disease causing (ClinVar)

Splicing

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

Other links and lift over

dbSNP: rs1135401796; hg19: chr3-71026871;