rs756830197

Positions:

• chr12-40933812-A-C
• chr12-40933812-A-G

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_001843.4(CNTN1):​c.919A>C​(p.Ile307Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000685 in 1,460,556 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: CNTN1 NM_001843.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.350

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]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.07910186).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CNTN1	NM_001843.4	c.919A>C	p.Ile307Leu	missense_variant	9/24	ENST00000551295.7	NP_001834.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CNTN1	ENST00000551295.7	c.919A>C	p.Ile307Leu	missense_variant	9/24	1	NM_001843.4	ENSP00000447006	P3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD3 exomes AF: 0.00000400 AC: 1 AN: 250292 Hom.: 0 AF XY: 0.00 AC XY: 0 AN XY: 135234

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000290

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 6.85e-7 AC: 1 AN: 1460556 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 726588

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.0000224

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ExAC AF: 0.00000824 AC: 1

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.15
BayesDel_addAF	Benign	-0.31	T
BayesDel_noAF	Benign	-0.60
CADD	Benign	7.3
DANN	Benign	0.56
DEOGEN2	Benign	0.27	.;T;.;T;.
Eigen	Benign	-1.3
Eigen_PC	Benign	-1.3
FATHMM_MKL	Benign	0.080	N
LIST_S2	Benign	0.45	.;.;T;T;T
M_CAP	Benign	0.0068	T
MetaRNN	Benign	0.079	T;T;T;T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	0.30	N;N;N;N;.
MutationTaster	Benign	1.0	N;N;N;N;N;N
PrimateAI	Benign	0.31	T
PROVEAN	Benign	-0.020	N;N;N;N;N
REVEL	Benign	0.060
Sift	Benign	1.0	T;T;T;T;T
Sift4G	Benign	0.76	T;T;T;T;T
Polyphen		0.0	B;B;B;B;B
Vest4		0.19
MutPred		0.40		Gain of relative solvent accessibility (P = 0.09);Gain of relative solvent accessibility (P = 0.09);Gain of relative solvent accessibility (P = 0.09);Gain of relative solvent accessibility (P = 0.09);.;
MVP		0.22
MPC		0.30
ClinPred		0.016	T
GERP RS		-2.2
Varity_R		0.13
gMVP		0.48

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

LitVar

Other links and lift over

dbSNP: rs756830197; hg19: chr12-41327614;