NM_014141.6:c.3305T>A

Variant names:

• chr7-148229703-T-A
• NM_014141.6:c.3305T>A

Variant summary

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

The NM_014141.6(CNTNAP2):​c.3305T>A​(p.Val1102Glu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. V1102A) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: CNTNAP2 NM_014141.6 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 2.88

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]

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 rank	MANE	Protein	UniProt
CNTNAP2	NM_014141.6	c.3305T>A	p.Val1102Glu	missense_variant	Exon 20 of 24	ENST00000361727.8	NP_054860.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CNTNAP2	ENST00000361727.8	c.3305T>A	p.Val1102Glu	missense_variant	Exon 20 of 24	1	NM_014141.6	ENSP00000354778.3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Cortical dysplasia-focal epilepsy syndrome Uncertain:1

Apr 08, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces valine, which is neutral and non-polar, with glutamic acid, which is acidic and polar, at codon 1102 of the CNTNAP2 protein (p.Val1102Glu). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with CNTNAP2-related conditions. ClinVar contains an entry for this variant (Variation ID: 2127330). An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant is likely to be disruptive. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.69
BayesDel_addAF	Uncertain	0.044	T
BayesDel_noAF	Benign	-0.18
CADD	Benign	18
DANN	Benign	0.97
DEOGEN2	Uncertain	0.57	D;D;T
Eigen	Benign	-0.52
Eigen_PC	Benign	-0.67
FATHMM_MKL	Benign	0.28	N
LIST_S2	Benign	0.84	.;T;T
M_CAP	Benign	0.085	D
MetaRNN	Uncertain	0.60	D;D;D
MetaSVM	Benign	-0.57	T
MutationAssessor	Uncertain	2.1	M;M;.
PrimateAI	Benign	0.40	T
PROVEAN	Uncertain	-2.5	D;.;.
REVEL	Uncertain	0.51
Sift	Benign	0.060	T;.;.
Sift4G	Benign	0.062	T;.;D
Polyphen		0.94	P;P;.
Vest4		0.75
MutPred		0.73		Gain of disorder (P = 0.0018);Gain of disorder (P = 0.0018);.;
MVP		0.84
MPC		0.39
ClinPred		0.75	D
GERP RS		0.45
Varity_R		0.20
gMVP		0.59

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr7-147926795;