5-138933926-A-T

Position:

chr5-138933926-A-T

Variant summary

Our verdict is Likely benign. Variant got -3 ACMG points: 1P and 4B. PP2BS2

The NM_001903.5(CTNNA1):c.2558A>T(p.Asn853Ile) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000212 in 1,461,892 control chromosomes in the GnomAD database, with no homozygous occurrence. 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. N853S) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.000021 ( 0 hom. )

Consequence

CTNNA1
NM_001903.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:3

Conservation

PhyloP100: 9.27

Variant links:

Genes affected

CTNNA1 (HGNC:2509): (catenin alpha 1) This gene encodes a member of the catenin family of proteins that play an important role in cell adhesion process by connecting cadherins located on the plasma membrane to the actin filaments inside the cell. The encoded mechanosensing protein contains three vinculin homology domains and undergoes conformational changes in response to cytoskeletal tension, resulting in the reconfiguration of cadherin-actin filament connections. Certain mutations in this gene cause butterfly-shaped pigment dystrophy. [provided by RefSeq, May 2016]

CTNNA1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -3 ACMG points.

PP2

Missense variant in gene, where missense usually causes diseases (based on misZ statistic), CTNNA1. . Gene score misZ 3.6624 (greater than the threshold 3.09). Trascript score misZ 4.1669 (greater than threshold 3.09). GenCC has associacion of gene with patterned macular dystrophy 2, CTNNA1-related diffuse gastric and lobular breast cancer syndrome, patterned macular dystrophy, hereditary nonpolyposis colon cancer.

BS2

High AC in GnomAdExome4 at 31 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CTNNA1	NM_001903.5 linkuse as main transcript	c.2558A>T	p.Asn853Ile	missense_variant	18/18	ENST00000302763.12

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CTNNA1	ENST00000302763.12 linkuse as main transcript	c.2558A>T	p.Asn853Ile	missense_variant	18/18	1	NM_001903.5	P1	P35221-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.00000398

AC:

AN:

251446

Hom.:

AF XY:

0.00000736

AC XY:

AN XY:

135912

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:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000879

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000212

AC:

AN:

1461892

Hom.:

Cov.:

AF XY:

0.0000206

AC XY:

AN XY:

727248

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:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000270

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

Cov.:

ExAC

AF:

0.00000824

AC:

EpiCase

AF:

0.00

EpiControl

AF:

0.0000593

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	GeneDx	Mar 20, 2023	Not observed at significant frequency in large population cohorts (gnomAD); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; Observed in individuals undergoing multigene panel testing at a commercial laboratory (Clark et al., 2020); This variant is associated with the following publications: (PMID: 32051609, 28404951) -
Uncertain significance, criteria provided, single submitter	clinical testing	Invitae	Dec 12, 2023	This sequence change replaces asparagine, which is neutral and polar, with isoleucine, which is neutral and non-polar, at codon 853 of the CTNNA1 protein (p.Asn853Ile). This variant is present in population databases (rs199994641, gnomAD 0.0009%). This variant has not been reported in the literature in individuals affected with CTNNA1-related conditions. ClinVar contains an entry for this variant (Variation ID: 658422). An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant is likely to be disruptive. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Hereditary cancer-predisposing syndrome

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jun 17, 2024

The p.N853I variant (also known as c.2558A>T), located in coding exon 17 of the CTNNA1 gene, results from an A to T substitution at nucleotide position 2558. The asparagine at codon 853 is replaced by isoleucine, an amino acid with dissimilar properties. This amino acid position is highly conserved in available vertebrate species. In addition, the in silico prediction for this alteration is inconclusive. The evidence for this gene-disease relationship is limited; therefore, the clinical significance of this alteration is unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.29

BayesDel_addAF

Uncertain

0.10

BayesDel_noAF

Benign

-0.090

CADD

Pathogenic

DANN

Uncertain

0.99

DEOGEN2

Benign

0.36

T;.;.

Eigen

Uncertain

0.28

Eigen_PC

Uncertain

0.24

FATHMM_MKL

Pathogenic

0.97

LIST_S2

Uncertain

0.96

D;D;D

M_CAP

Benign

0.075

MetaRNN

Uncertain

0.64

D;D;D

MetaSVM

Benign

-0.91

MutationAssessor

Benign

2.0

M;.;.

MutationTaster

Benign

1.0

D;D;D;D;D

PrimateAI

Uncertain

0.67

PROVEAN

Uncertain

-2.7

D;D;D

REVEL

Benign

0.28

Sift

Uncertain

0.024

D;D;D

Sift4G

Uncertain

0.029

D;D;T

Polyphen

1.0

D;.;.

Vest4

0.87

MutPred

0.51

Loss of sheet (P = 0.0181);.;.;

MVP

0.60

MPC

2.1

ClinPred

0.94

GERP RS

3.7

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.57

gMVP

0.57

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