chr5-138824559-G-T

Variant names:

• chr5-138824559-G-T
• rs150893072
• NM_001903.5:c.618G>T

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_001903.5(CTNNA1):​c.618G>T​(p.Gln206His) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another nucleotide change resulting in the same amino acid substitution has been previously reported as Likely benign in ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. Q206L) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: CTNNA1 NM_001903.5 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.809
• Publications: 0 publications found

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

ACMG classification

Our verdict: Uncertain_significance. The variant received 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
CTNNA1	NM_001903.5	c.618G>T	p.Gln206His	missense_variant	Exon 6 of 18	ENST00000302763.12	NP_001894.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CTNNA1	ENST00000302763.12	c.618G>T	p.Gln206His	missense_variant	Exon 6 of 18	1	NM_001903.5	ENSP00000304669.7

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.38
BayesDel_addAF	Benign	-0.020	T
BayesDel_noAF	Benign	-0.27
CADD	Benign	22
DANN	Uncertain	0.99
DEOGEN2	Benign	0.021	T;T;T;.;T
Eigen	Benign	0.028
Eigen_PC	Benign	0.070
FATHMM_MKL	Uncertain	0.95	D
LIST_S2	Uncertain	0.96	D;D;D;D;.
M_CAP	Benign	0.017	T
MetaRNN	Uncertain	0.45	T;T;T;T;T
MetaSVM	Benign	-0.95	T
MutationAssessor	Benign	1.8	.;L;.;.;.
PhyloP100		0.81
PrimateAI	Uncertain	0.61	T
PROVEAN	Benign	-1.7	.;N;N;N;N
REVEL	Benign	0.17
Sift	Uncertain	0.0060	.;D;D;D;D
Sift4G	Uncertain	0.010	D;D;D;D;D
Polyphen		0.85	P;P;.;.;P
Vest4		0.68
MutPred		0.69		Loss of MoRF binding (P = 0.0964);Loss of MoRF binding (P = 0.0964);.;Loss of MoRF binding (P = 0.0964);Loss of MoRF binding (P = 0.0964);
MVP		0.51
MPC		0.19
ClinPred		0.71	D
GERP RS		2.3
Varity_R		0.68
gMVP		0.48
Mutation Taster		=95/5	polymorphism

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: rs150893072; hg19: chr5-138160248;