Genetic Variant CNTN1:p.Asn338Lys (chr12-40936809-T-A) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_001843.4(CNTN1):c.1014T>A(p.Asn338Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,461,022 control chromosomes in the GnomAD database, with no homozygous occurrence. 14/22 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. N338S) has been classified as Likely benign.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

CNTN1
NM_001843.4 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 0.171

Publications

0 publications found

Variant links:

Genes affected

CNTN1 (HGNC:2171): (contactin 1) The protein encoded by this gene is a member of the immunoglobulin superfamily. It is a glycosylphosphatidylinositol (GPI)-anchored neuronal membrane protein that functions as a cell adhesion molecule. It may play a role in the formation of axon connections in the developing nervous system. Multiple alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Dec 2011]

CNTN1 Gene-Disease associations (from GenCC):

Compton-North congenital myopathy
Inheritance: AR Classification: STRONG, MODERATE, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics, Orphanet
schizophrenia
Inheritance: Unknown Classification: NO_KNOWN Submitted by: Labcorp Genetics (formerly Invitae)

CNTN1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 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
CNTN1	NM_001843.4 link	c.1014T>A	p.Asn338Lys	missense_variant	Exon 10 of 24	ENST00000551295.7	NP_001834.2	Q12860-1A0A024R104

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CNTN1	ENST00000551295.7 link	c.1014T>A	p.Asn338Lys	missense_variant	Exon 10 of 24	1	NM_001843.4	ENSP00000447006.1		Q12860-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000137

AC:

AN:

1461022

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

726798

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33438

American (AMR)

AF:

0.00

AC:

AN:

44666

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26102

East Asian (EAS)

AF:

0.00

AC:

AN:

39682

South Asian (SAS)

AF:

0.00

AC:

AN:

86256

European-Finnish (FIN)

AF:

0.0000375

AC:

AN:

53402

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5758

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1111384

Other (OTH)

AF:

0.00

AC:

AN:

60334

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.500

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.26

BayesDel_addAF

Benign

-0.13

BayesDel_noAF

Benign

-0.43

CADD

Benign

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.30

.;T;.;T;.

Eigen

Benign

-0.11

Eigen_PC

Benign

-0.042

FATHMM_MKL

Uncertain

0.85

LIST_S2

Uncertain

0.91

.;.;D;D;D

M_CAP

Benign

0.030

MetaRNN

Uncertain

0.52

D;D;D;D;D

MetaSVM

Benign

-0.84

MutationAssessor

Benign

0.47

N;N;N;N;.

PhyloP100

0.17

PrimateAI

Uncertain

0.68

PROVEAN

Benign

-2.3

N;N;N;N;N

REVEL

Benign

0.23

Sift

Benign

0.24

T;T;T;T;T

Sift4G

Benign

0.27

T;T;T;T;T

Polyphen

0.97

D;P;D;P;P

Vest4

0.30

MutPred

0.50

Gain of ubiquitination at N338 (P = 0.0198);Gain of ubiquitination at N338 (P = 0.0198);Gain of ubiquitination at N338 (P = 0.0198);Gain of ubiquitination at N338 (P = 0.0198);.;

MVP

0.69

MPC

0.96

ClinPred

0.94

GERP RS

2.9

Varity_R

0.20

gMVP

0.63

Mutation Taster

=38/62

disease causing

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Computational scores

Splicing

Publications

Other links and lift over