NM_001904.4:c.283C>G

Variant names:

• chr3-41224995-C-G
• rs775104326
• NM_001904.4:c.283C>G

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_001904.4(CTNNB1):​c.283C>G​(p.Arg95Gly) variant causes a missense change. The variant allele was found at a frequency of 0.000000684 in 1,461,790 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R95Q) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: CTNNB1 NM_001904.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 3.87
• Publications: 0 publications found

Genes affected

CTNNB1 (HGNC:2514): (catenin beta 1) The protein encoded by this gene is part of a complex of proteins that constitute adherens junctions (AJs). AJs are necessary for the creation and maintenance of epithelial cell layers by regulating cell growth and adhesion between cells. The encoded protein also anchors the actin cytoskeleton and may be responsible for transmitting the contact inhibition signal that causes cells to stop dividing once the epithelial sheet is complete. Finally, this protein binds to the product of the APC gene, which is mutated in adenomatous polyposis of the colon. Mutations in this gene are a cause of colorectal cancer (CRC), pilomatrixoma (PTR), medulloblastoma (MDB), and ovarian cancer. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Aug 2016]

CTNNB1 Gene-Disease associations (from GenCC):

• exudative vitreoretinopathy

  Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: Orphanet, G2P
• severe intellectual disability-progressive spastic diplegia syndrome

  Inheritance: Unknown, AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, ClinGen, G2P, Labcorp Genetics (formerly Invitae), Illumina, Ambry Genetics
• exudative vitreoretinopathy 7

  Inheritance: AD Classification: STRONG, MODERATE Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics

ACMG classification

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.856

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001904.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CTNNB1	NM_001904.4	MANE Select	c.283C>G	p.Arg95Gly	missense	Exon 4 of 15	NP_001895.1	P35222
	CTNNB1	NM_001098209.2		c.283C>G	p.Arg95Gly	missense	Exon 4 of 16	NP_001091679.1	P35222
	CTNNB1	NM_001098210.2		c.283C>G	p.Arg95Gly	missense	Exon 4 of 16	NP_001091680.1	P35222

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CTNNB1	ENST00000349496.11	TSL:1 MANE Select	c.283C>G	p.Arg95Gly	missense	Exon 4 of 15	ENSP00000344456.5	P35222
	CTNNB1	ENST00000396183.7	TSL:1	c.283C>G	p.Arg95Gly	missense	Exon 4 of 16	ENSP00000379486.3	P35222
	CTNNB1	ENST00000396185.8	TSL:1	c.283C>G	p.Arg95Gly	missense	Exon 4 of 16	ENSP00000379488.3	P35222

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461790 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 727204

African (AFR) AF: 0.00 AC: 0 AN: 33468

American (AMR) AF: 0.00 AC: 0 AN: 44716

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26132

East Asian (EAS) AF: 0.00 AC: 0 AN: 39700

South Asian (SAS) AF: 0.00 AC: 0 AN: 86258

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53416

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5766

European-Non Finnish (NFE) AF: 8.99e-7 AC: 1 AN: 1111938

Other (OTH) AF: 0.00 AC: 0 AN: 60396

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.99
BayesDel_addAF	Pathogenic	0.23	D
BayesDel_noAF	Uncertain	0.090
CADD	Pathogenic	27
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.87	D
Eigen	Uncertain	0.63
Eigen_PC	Uncertain	0.57
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Pathogenic	0.99	D
M_CAP	Benign	0.081	D
MetaRNN	Pathogenic	0.86	D
MetaSVM	Benign	-0.31	T
MutationAssessor	Uncertain	2.7	M
PhyloP100		3.9
PrimateAI	Pathogenic	0.87	D
PROVEAN	Uncertain	-4.2	D
REVEL	Uncertain	0.43
Sift	Uncertain	0.0030	D
Sift4G	Benign	0.072	T
Polyphen		1.0	D
Vest4		0.90
MutPred		0.73		Loss of methylation at R95 (P = 0.0504)
MVP		0.81
MPC		2.6
ClinPred		0.99	D
GERP RS		4.5
Varity_R		0.56
gMVP		0.96
Mutation Taster		=36/64	disease causing

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

Other links and lift over

dbSNP: rs775104326; hg19: chr3-41266486; COSMIC: COSV62728824;