NM_020872.3:c.2433A>T

Variant names:

• chr3-74295205-T-A
• rs10490832
• NM_020872.3:c.2433A>T

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 2P and 5B. PM2 BP4_Strong BP7

The NM_020872.3(CNTN3):​c.2433A>T​(p.Ala811Ala) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000685 in 1,460,040 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. A811A) has been classified as Benign.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: CNTN3 NM_020872.3 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.475
• Publications: 0 publications found

Genes affected

CNTN3 (HGNC:2173): (contactin 3) Predicted to be involved in cell adhesion and nervous system development. Predicted to be located in extracellular region and plasma membrane. Predicted to be active in neuron projection. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Our verdict: Likely_benign. The variant received -3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.77).
• BP7: Synonymous conserved (PhyloP=-0.475 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_020872.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CNTN3	NM_020872.3	MANE Select	c.2433A>T	p.Ala811Ala	synonymous	Exon 19 of 23	NP_065923.1	Q9P232
	CNTN3	NM_001393376.1		c.2433A>T	p.Ala811Ala	synonymous	Exon 19 of 23	NP_001380305.1	Q9P232

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CNTN3	ENST00000263665.7	TSL:1 MANE Select	c.2433A>T	p.Ala811Ala	synonymous	Exon 19 of 23	ENSP00000263665.6	Q9P232
	CNTN3	ENST00000962150.1		c.2427A>T	p.Ala809Ala	synonymous	Exon 20 of 24	ENSP00000632209.1
	CNTN3	ENST00000962149.1		c.2118A>T	p.Ala706Ala	synonymous	Exon 17 of 21	ENSP00000632208.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.85e-7 AC: 1 AN: 1460040 Hom.: 0 Cov.: 29 AF XY: 0.00 AC XY: 0 AN XY: 726388

African (AFR) AF: 0.00 AC: 0 AN: 33454

American (AMR) AF: 0.00 AC: 0 AN: 44710

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26098

East Asian (EAS) AF: 0.00 AC: 0 AN: 39674

South Asian (SAS) AF: 0.00 AC: 0 AN: 86150

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53390

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5762

European-Non Finnish (NFE) AF: 9.01e-7 AC: 1 AN: 1110480

Other (OTH) AF: 0.00 AC: 0 AN: 60322

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.77
CADD	Benign	7.3
DANN	Benign	0.54
PhyloP100		-0.47

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		Details are displayed if max score is > 0.2

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

Other links and lift over

dbSNP: rs10490832; hg19: chr3-74344356;