chr5-138781905-T-C

Variant names:

• chr5-138781905-T-C
• NM_001903.5:c.-2-18T>C

Variant summary

Our verdict is Likely benign. The variant received -4 ACMG points: 2P and 6B. PM2 BP4_Strong BP6_Moderate

The NM_001903.5(CTNNA1):​c.-2-18T>C variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: CTNNA1 NM_001903.5 intron
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: 0.0760
• 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: Labcorp Genetics (formerly Invitae), G2P, Ambry Genetics
• patterned macular dystrophy

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• hereditary nonpolyposis colon cancer

  Inheritance: Unknown Classification: NO_KNOWN Submitted by: ClinGen

ACMG classification

Our verdict: Likely_benign. The variant received -4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.79).
• BP6: Variant 5-138781905-T-C is Benign according to our data. Variant chr5-138781905-T-C is described in ClinVar as Likely_benign. ClinVar VariationId is 3773474.Status of the report is criteria_provided_single_submitter, 1 stars.

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

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CTNNA1	NM_001903.5	MANE Select	c.-2-18T>C		intron	N/A	NP_001894.2	A0A384MDY0
	CTNNA1	NM_001323982.2		c.-2-18T>C		intron	N/A	NP_001310911.1	P35221-1
	CTNNA1	NM_001323983.1		c.-2-18T>C		intron	N/A	NP_001310912.1	A0A384MDY0

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CTNNA1	ENST00000302763.12	TSL:1 MANE Select	c.-2-18T>C		intron	N/A	ENSP00000304669.7	P35221-1
	CTNNA1	ENST00000965845.1		c.-2-18T>C		intron	N/A	ENSP00000635904.1
	CTNNA1	ENST00000930310.1		c.-2-18T>C		intron	N/A	ENSP00000600369.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 29

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions

Significance: Likely benign

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	-	1	Hereditary diffuse gastric adenocarcinoma (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.79
CADD	Benign	4.1
DANN	Benign	0.62
PhyloP100		0.076
PromoterAI		0.017	Neutral

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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

hg19: chr5-138117594;