5-179678730-C-T

Variant names:

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_001164444.2(CBY3):c.582G>A(p.Met194Ile) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000325 in 1,537,036 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/19 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. M194K) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 33)

Exomes 𝑓: 0.0000022 ( 0 hom. )

Consequence

CBY3
NM_001164444.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -3.88

Variant links:

Genes affected

CBY3 (HGNC:33278): (chibby family member 3)

CBY3 links:

CANX (HGNC:1473): (calnexin) This gene encodes a member of the calnexin family of molecular chaperones. The encoded protein is a calcium-binding, endoplasmic reticulum (ER)-associated protein that interacts transiently with newly synthesized N-linked glycoproteins, facilitating protein folding and assembly. It may also play a central role in the quality control of protein folding by retaining incorrectly folded protein subunits within the ER for degradation. Alternatively spliced transcript variants encoding different isoforms have been described. [provided by RefSeq, Jun 2018]

CANX links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.05645609).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CBY3	NM_001164444.2 link	c.582G>A	p.Met194Ile	missense_variant	Exon 2 of 2	ENST00000376974.5	NP_001157916.1	A6NI87
CBY3	XM_047417524.1 link	c.291G>A	p.Met97Ile	missense_variant	Exon 2 of 2		XP_047273480.1
CANX	XM_011534665.4 link	c.-51C>T		5_prime_UTR_variant	Exon 1 of 15		XP_011532967.1	P27824-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
CBY3	ENST00000376974.5 link	c.582G>A	p.Met194Ile	missense_variant	Exon 2 of 2	2	NM_001164444.2	ENSP00000366173.4	A6NI87
CANX	ENST00000681674 link	c.-51C>T		5_prime_UTR_variant	Exon 1 of 15			ENSP00000505013.1	P27824-1
CANX	ENST00000681712 link	c.-600C>T		5_prime_UTR_variant	Exon 1 of 16			ENSP00000506061.1	P27824-1
CANX	ENST00000681903 link	c.-558C>T		5_prime_UTR_variant	Exon 1 of 15			ENSP00000506509.1	P27824-1

Frequencies

GnomAD3 genomes

AF:

0.0000131

AC:

AN:

152240

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.00000217

AC:

AN:

1384678

Hom.:

Cov.:

AF XY:

0.00000439

AC XY:

AN XY:

683292

show subpopulations

Gnomad4 AFR exome

AF:

0.0000317

Gnomad4 AMR exome

AF:

0.00

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:

0.00000185

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000131

AC:

AN:

152358

Hom.:

Cov.:

AF XY:

0.0000268

AC XY:

AN XY:

74512

show subpopulations

Gnomad4 AFR

AF:

0.0000240

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000712

Hom.:

Bravo

AF:

0.00000756

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Aug 22, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.582G>A (p.M194I) alteration is located in exon 2 (coding exon 2) of the CBY3 gene. This alteration results from a G to A substitution at nucleotide position 582, causing the methionine (M) at amino acid position 194 to be replaced by an isoleucine (I). 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

Uncertain

0.55

BayesDel_addAF

Benign

-0.085

BayesDel_noAF

Benign

-0.36

CADD

Benign

0.30

DANN

Benign

0.96

DEOGEN2

Benign

0.018

Eigen

Benign

-0.69

Eigen_PC

Benign

-0.73

FATHMM_MKL

Benign

0.040

M_CAP

Benign

0.020

MetaRNN

Benign

0.056

MetaSVM

Benign

-1.0

MutationAssessor

Benign

0.69

PrimateAI

Uncertain

0.57

PROVEAN

Benign

-0.28

REVEL

Benign

0.026

Sift

Uncertain

0.015

Sift4G

Uncertain

0.022

Vest4

0.24

MutPred

0.35

Loss of disorder (P = 0.0414);

MVP

0.040

ClinPred

0.23

GERP RS

0.46

Varity_R

0.29

gMVP

0.23

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