Genetic Variant CNTNAP3:p.Arg1275Pro (chr9-39073933-C-G) – ACMG Classification: Likely_benign (-4 pts)

Variant summary

Our verdict is Likely benign. Variant got -4 ACMG points: 0P and 4B. BP4_Strong

The NM_033655.5(CNTNAP3):c.3824G>C(p.Arg1275Pro) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000328 in 152,294 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000033 ( 0 hom., cov: 37)

Exomes 𝑓: 0.000026 ( 0 hom. )

Failed GnomAD Quality Control

Consequence

CNTNAP3
NM_033655.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 1.18

Variant links:

Genes affected

CNTNAP3 (HGNC:13834): (contactin associated protein family member 3) The protein encoded by this gene belongs to the NCP family of cell-recognition molecules. This family represents a distinct subgroup of the neurexins. NCP proteins mediate neuron-glial interactions in vertebrates and glial-glial contact in invertebrates. The protein encoded by this gene may play a role in cell recognition within the nervous system. Alternatively spliced transcript variants encoding different isoforms have been described but their biological nature has not been determined. [provided by RefSeq, Jul 2008]

CNTNAP3 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -4 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.011651248).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CNTNAP3	NM_033655.5 link	c.3824G>C	p.Arg1275Pro	missense_variant	Exon 24 of 24	ENST00000297668.11	NP_387504.2	Q9BZ76-1
CNTNAP3	NM_001393379.1 link	c.3581G>C	p.Arg1194Pro	missense_variant	Exon 23 of 23		NP_001380308.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
CNTNAP3	ENST00000297668.11 link	c.3824G>C	p.Arg1275Pro	missense_variant	Exon 24 of 24	1	NM_033655.5	ENSP00000297668.6	Q9BZ76-1
CNTNAP3	ENST00000377656.6 link	c.3581G>C	p.Arg1194Pro	missense_variant	Exon 23 of 23	1		ENSP00000366884.2	A6NC89
CNTNAP3	ENST00000493965.5 link	n.506G>C		non_coding_transcript_exon_variant	Exon 5 of 5	5

Frequencies

GnomAD3 genomes

AF:

0.0000328

AC:

AN:

152294

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000414

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000441

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000154

AC:

AN:

201076

Hom.:

AF XY:

0.000237

AC XY:

AN XY:

109922

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.000913

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000856

Gnomad OTH exome

AF:

0.000194

GnomAD4 exome

Data not reliable, filtered out with message: AS_VQSR

AF:

0.0000256

AC:

AN:

1444402

Hom.:

Cov.:

AF XY:

0.0000403

AC XY:

AN XY:

718892

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.000314

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000630

Gnomad4 OTH exome

AF:

0.0000333

GnomAD4 genome

AF:

0.0000328

AC:

AN:

152294

Hom.:

Cov.:

AF XY:

0.0000134

AC XY:

AN XY:

74404

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000414

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000441

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000480

Hom.:

ExAC

AF:

0.000231

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Feb 16, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.3824G>C (p.R1275P) alteration is located in exon 24 (coding exon 24) of the CNTNAP3 gene. This alteration results from a G to C substitution at nucleotide position 3824, causing the arginine (R) at amino acid position 1275 to be replaced by a proline (P). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.11

BayesDel_addAF

Benign

-0.58

BayesDel_noAF

Benign

-0.67

CADD

Benign

DANN

Benign

0.96

DEOGEN2

Benign

0.0053

T;.

Eigen

Benign

-0.99

Eigen_PC

Benign

-0.99

FATHMM_MKL

Benign

0.15

LIST_S2

Benign

0.54

T;T

M_CAP

Benign

0.0032

MetaRNN

Benign

0.012

T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

0.0

N;.

PrimateAI

Benign

0.31

PROVEAN

Benign

-0.45

N;N

REVEL

Benign

0.039

Sift

Benign

0.084

T;T

Sift4G

Uncertain

0.039

D;T

Polyphen

0.0

B;B

Vest4

0.15

MutPred

0.29

Loss of MoRF binding (P = 0.0031);.;

MVP

0.34

ClinPred

0.032

GERP RS

-2.1

Varity_R

0.11

gMVP

0.43

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

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