Genetic Variant CNTN1:c.401-9C>T (chr12-40924548-C-T) – ACMG Classification: Benign (-20 pts)

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBA1

The NM_001843.4(CNTN1):c.401-9C>T variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00431 in 1,460,780 control chromosomes in the GnomAD database, including 212 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

Frequency

Genomes: 𝑓 0.022 ( 112 hom., cov: 29)

Exomes 𝑓: 0.0023 ( 100 hom. )

Consequence

CNTN1
NM_001843.4 intron

Scores

Splicing: ADA: 0.000007755

Clinical Significance

Benign criteria provided, multiple submitters, no conflicts B:5

Conservation

PhyloP100: -0.325

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 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -20 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.74).

BP6

Variant 12-40924548-C-T is Benign according to our data. Variant chr12-40924548-C-T is described in ClinVar as [Benign]. Clinvar id is 128797.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BA1

GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.0737 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CNTN1	NM_001843.4 link	c.401-9C>T		intron_variant	Intron 5 of 23	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.401-9C>T		intron_variant	Intron 5 of 23	1	NM_001843.4	ENSP00000447006.1		Q12860-1

Frequencies

GnomAD3 genomes

AF:

0.0221

AC:

3340

AN:

151276

Hom.:

113

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0761

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0104

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000221

Gnomad OTH

AF:

0.0159

GnomAD3 exomes

AF:

0.00577

AC:

1414

AN:

245000

Hom.:

AF XY:

0.00411

AC XY:

543

AN XY:

132248

show subpopulations

Gnomad AFR exome

AF:

0.0775

Gnomad AMR exome

AF:

0.00423

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000675

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000200

Gnomad OTH exome

AF:

0.00268

GnomAD4 exome

AF:

0.00226

AC:

2958

AN:

1309386

Hom.:

100

Cov.:

AF XY:

0.00196

AC XY:

1291

AN XY:

659852

show subpopulations

Gnomad4 AFR exome

AF:

0.0752

Gnomad4 AMR exome

AF:

0.00456

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.000170

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000179

Gnomad4 OTH exome

AF:

0.00501

GnomAD4 genome

AF:

0.0221

AC:

3339

AN:

151394

Hom.:

112

Cov.:

AF XY:

0.0215

AC XY:

1590

AN XY:

73910

show subpopulations

Gnomad4 AFR

AF:

0.0759

Gnomad4 AMR

AF:

0.0104

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000221

Gnomad4 OTH

AF:

0.0157

Alfa

AF:

0.0123

Hom.:

Bravo

AF:

0.0252

ClinVar

Significance: Benign

Submissions summary: Benign:5

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:4

PreventionGenetics, part of Exact Sciences

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Jun 03, 2016

GeneDx

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -

Jun 06, 2017

Athena Diagnostics

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Genetic Services Laboratory, University of Chicago

Significance: Likely benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

Likely benign based on allele frequency in 1000 Genomes Project or ESP global frequency and its presence in a patient with a rare or unrelated disease phenotype. NOT Sanger confirmed. -

Compton-North congenital myopathy

Benign:1

Feb 03, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.74

CADD

Benign

7.9

DANN

Benign

0.73

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.0000078

dbscSNV1_RF

Benign

0.010

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

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over