Genetic Variant CNBD2:p.Arg31Gln (chr20-35972669-G-A) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

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

The NM_001365709.1(CNBD2):c.92G>A(p.Arg31Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000144 in 1,461,752 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.000014 ( 0 hom. )

Consequence

CNBD2
NM_001365709.1 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 3.32

Variant links:

Genes affected

CNBD2 (HGNC:16145): (cyclic nucleotide binding domain containing 2) Predicted to enable cAMP binding activity. Predicted to be involved in spermatogenesis. Predicted to be located in cytosol. [provided by Alliance of Genome Resources, Apr 2022]

CNBD2 links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 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
CNBD2	NM_001365709.1 link	c.92G>A	p.Arg31Gln	missense_variant	Exon 2 of 12	ENST00000373973.7	NP_001352638.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CNBD2	ENST00000373973.7 link	c.92G>A	p.Arg31Gln	missense_variant	Exon 2 of 12	5	NM_001365709.1	ENSP00000363084.3		Q96M20-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.0000159

AC:

AN:

251486

Hom.:

AF XY:

0.0000147

AC XY:

AN XY:

135916

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:

0.000131

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000144

AC:

AN:

1461752

Hom.:

Cov.:

AF XY:

0.0000124

AC XY:

AN XY:

727190

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000580

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000135

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

ExAC

AF:

0.0000165

AC:

EpiCase

AF:

0.00

EpiControl

AF:

0.0000593

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Oct 25, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.92G>A (p.R31Q) alteration is located in exon 2 (coding exon 2) of the CNBD2 gene. This alteration results from a G to A substitution at nucleotide position 92, causing the arginine (R) at amino acid position 31 to be replaced by a glutamine (Q). 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

0.20

BayesDel_addAF

Benign

-0.16

BayesDel_noAF

Benign

-0.27

CADD

Pathogenic

DANN

Pathogenic

1.0

DEOGEN2

Benign

0.033

.;T;.;T;.

Eigen

Pathogenic

0.73

Eigen_PC

Pathogenic

0.72

FATHMM_MKL

Benign

0.75

LIST_S2

Uncertain

0.92

D;D;D;D;D

M_CAP

Benign

0.010

MetaRNN

Uncertain

0.61

D;D;D;D;D

MetaSVM

Benign

-0.98

MutationAssessor

Uncertain

2.9

.;M;M;.;M

PrimateAI

Benign

0.44

PROVEAN

Benign

-1.6

.;N;N;.;N

REVEL

Benign

0.20

Sift

Benign

0.068

.;T;D;.;D

Sift4G

Pathogenic

0.0

D;D;D;D;D

Polyphen

1.0

.;D;D;.;.

Vest4

0.54, 0.52, 0.64, 0.46

MutPred

0.78

.;Loss of MoRF binding (P = 0.0209);Loss of MoRF binding (P = 0.0209);Loss of MoRF binding (P = 0.0209);Loss of MoRF binding (P = 0.0209);

MVP

0.61

MPC

0.60

ClinPred

0.96

GERP RS

5.9

Varity_R

0.15

gMVP

0.56

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.080

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