7-146116535-ATT-ATTTT

Variant names:

• chr7-146116535-A-ATT
• rs886062041
• ENST00000625365.2:c.-229-113_-229-112insTT

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 0P and 0B.

The ENST00000625365.2(CNTNAP2):​c.-229-113_-229-112insTT variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000911 in 87,796 control chromosomes in the GnomAD database, with no homozygous occurrence. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 31)
  • Exomes 𝑓: 0.000091 (0 hom.)
• Consequence: CNTNAP2 ENST00000625365.2 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.132
• Publications: 0 publications found

Genes affected

CNTNAP2 (HGNC:13830): (contactin associated protein 2) This gene encodes a member of the neurexin family which functions in the vertebrate nervous system as cell adhesion molecules and receptors. This protein, like other neurexin proteins, contains epidermal growth factor repeats and laminin G domains. In addition, it includes an F5/8 type C domain, discoidin/neuropilin- and fibrinogen-like domains, thrombospondin N-terminal-like domains and a putative PDZ binding site. This protein is localized at the juxtaparanodes of myelinated axons, and mediates interactions between neurons and glia during nervous system development and is also involved in localization of potassium channels within differentiating axons. This gene encompasses almost 1.5% of chromosome 7 and is one of the largest genes in the human genome. It is directly bound and regulated by forkhead box protein P2, a transcription factor related to speech and language development. This gene has been implicated in multiple neurodevelopmental disorders, including Gilles de la Tourette syndrome, schizophrenia, epilepsy, autism, ADHD and intellectual disability. [provided by RefSeq, Jul 2017]

CNTNAP2 Gene-Disease associations (from GenCC):

• complex neurodevelopmental disorder

  Inheritance: AR, AD Classification: DEFINITIVE, NO_KNOWN Submitted by: ClinGen
• cortical dysplasia-focal epilepsy syndrome

  Inheritance: AR Classification: DEFINITIVE, STRONG, MODERATE, SUPPORTIVE Submitted by: Illumina, Labcorp Genetics (formerly Invitae), Orphanet, G2P, Ambry Genetics

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CNTNAP2	ENST00000625365.2	c.-229-113_-229-112insTT		intron_variant	Intron 1 of 3	5		ENSP00000485955.1

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome AF: 0.0000911 AC: 8 AN: 87796 Hom.: 0 Cov.: 0 AF XY: 0.0000669 AC XY: 3 AN XY: 44858

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.000296 AC: 1 AN: 3374

American (AMR) AF: 0.000532 AC: 2 AN: 3762

Ashkenazi Jewish (ASJ) AF: 0.000592 AC: 2 AN: 3378

East Asian (EAS) AF: 0.000135 AC: 1 AN: 7428

South Asian (SAS) AF: 0.000321 AC: 1 AN: 3112

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 4976

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 418

European-Non Finnish (NFE) AF: 0.0000180 AC: 1 AN: 55448

Other (OTH) AF: 0.00 AC: 0 AN: 5900

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0.000000), which strongly suggests a high chance of mosaicism in these individuals.

GnomAD4 genome Cov.: 31

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
PhyloP100		-0.13

Splicing

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

Other links and lift over

dbSNP: rs886062041; hg19: chr7-145813627;