Genetic Variant CTNNA1:p.Gln781Gln (chr5-138932622-A-G) – ACMG Classification: Benign (-20 pts)

Variant summary

Our verdict is Benign. The variant received -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBS1BS2

The NM_001903.5(CTNNA1):c.2343A>G(p.Gln781Gln) variant causes a synonymous change. The variant allele was found at a frequency of 0.00188 in 1,614,162 control chromosomes in the GnomAD database, including 56 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.0092 ( 21 hom., cov: 32)

Exomes 𝑓: 0.0011 ( 35 hom. )

Consequence

CTNNA1
NM_001903.5 synonymous

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:8

Conservation

PhyloP100: 3.69

Publications

2 publications found

Variant links:

COSMIC-nc: COSV104406637

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 Gene-Disease associations (from GenCC):

CTNNA1-related diffuse gastric and lobular breast cancer syndrome
Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
patterned macular dystrophy 2
Inheritance: AD Classification: DEFINITIVE, STRONG, LIMITED Submitted by: G2P, Labcorp Genetics (formerly Invitae), Ambry Genetics
patterned macular dystrophy
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
hereditary nonpolyposis colon cancer
Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen

CTNNA1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -20 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.6).

BP6

Variant 5-138932622-A-G is Benign according to our data. Variant chr5-138932622-A-G is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 239064.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.00921 (1402/152276) while in subpopulation AFR AF = 0.0316 (1315/41556). AF 95% confidence interval is 0.0302. There are 21 homozygotes in GnomAd4. There are 640 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

BS2

High AC in GnomAd4 at 1402 AD gene.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001903.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
CTNNA1	NM_001903.5	MANE Select	c.2343A>G	p.Gln781Gln	synonymous	Exon 17 of 18	NP_001894.2
CTNNA1	NM_001323982.2		c.2343A>G	p.Gln781Gln	synonymous	Exon 18 of 19	NP_001310911.1
CTNNA1	NM_001323983.1		c.2343A>G	p.Gln781Gln	synonymous	Exon 17 of 18	NP_001310912.1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
CTNNA1	ENST00000302763.12	TSL:1 MANE Select	c.2343A>G	p.Gln781Gln	synonymous	Exon 17 of 18	ENSP00000304669.7
CTNNA1	ENST00000518825.5	TSL:1	c.2343A>G	p.Gln781Gln	synonymous	Exon 16 of 18	ENSP00000427821.1
CTNNA1	ENST00000540387.5	TSL:1	c.1233A>G	p.Gln411Gln	synonymous	Exon 11 of 12	ENSP00000438476.1

Frequencies

GnomAD3 genomes

AF:

0.00921

AC:

1401

AN:

152158

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0317

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00308

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00166

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000235

Gnomad OTH

AF:

0.00764

GnomAD2 exomes

AF:

0.00268

AC:

674

AN:

251380

AF XY:

0.00201

show subpopulations

Gnomad AFR exome

AF:

0.0345

Gnomad AMR exome

AF:

0.00179

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000123

Gnomad OTH exome

AF:

0.00147

GnomAD4 exome

AF:

0.00111

AC:

1626

AN:

1461886

Hom.:

Cov.:

AF XY:

0.000994

AC XY:

723

AN XY:

727242

show subpopulations

African (AFR)

AF:

0.0347

AC:

1162

AN:

33478

American (AMR)

AF:

0.00199

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39698

South Asian (SAS)

AF:

0.00110

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53420

Middle Eastern (MID)

AF:

0.000693

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.000122

AC:

136

AN:

1112010

Other (OTH)

AF:

0.00232

AC:

140

AN:

60394

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.480

Heterozygous variant carriers

186

278

371

464

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

132

176

220

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.00921

AC:

1402

AN:

152276

Hom.:

Cov.:

AF XY:

0.00860

AC XY:

640

AN XY:

74458

show subpopulations

African (AFR)

AF:

0.0316

AC:

1315

AN:

41556

American (AMR)

AF:

0.00307

AC:

AN:

15298

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3466

East Asian (EAS)

AF:

0.00

AC:

AN:

5180

South Asian (SAS)

AF:

0.00166

AC:

AN:

4824

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10616

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000235

AC:

AN:

68014

Other (OTH)

AF:

0.00756

AC:

AN:

2116

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.500

Heterozygous variant carriers

133

199

266

332

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

Variant carriers

100

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.00536

Hom.:

Bravo

AF:

0.0107

Asia WGS

AF:

0.00202

AC:

AN:

3478

EpiCase

AF:

0.000218

EpiControl

AF:

0.000296

ClinVar

ClinVar submissions as Germline

Significance:Benign/Likely benign

Revision:criteria provided, multiple submitters, no conflicts

View on ClinVar

Pathogenic

VUS

Benign

Condition

not specified (3)

Hereditary cancer-predisposing syndrome (2)

Hereditary diffuse gastric adenocarcinoma (1)

Hereditary nonpolyposis colon cancer (1)

not provided (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.60

CADD

Benign

6.2

(source)

DANN

Benign

0.64

PhyloP100

3.7

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.8

Mutation Taster

=94/6

polymorphism

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over