2-172427800-C-T

Variant names:

• chr2-172427800-C-T
• rs201026395
• NM_001394928.1:c.12C>T

Variant summary

Our verdict is Likely benign. The variant received -1 ACMG points: 2P and 3B. PM2 BP4_Moderate BP7

The NM_000210.4(ITGA6):​c.12C>T​(p.Ala4Ala) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000693 in 1,443,666 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. A4A) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 6.9e-7 (0 hom.)
• Consequence: ITGA6 NM_000210.4 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.0590
• Publications: 0 publications found

Genes affected

ITGA6 (HGNC:6142): (integrin subunit alpha 6) The gene encodes a member of the integrin alpha chain family of proteins. Integrins are heterodimeric integral membrane proteins composed of an alpha chain and a beta chain that function in cell surface adhesion and signaling. The encoded preproprotein is proteolytically processed to generate light and heavy chains that comprise the alpha 6 subunit. This subunit may associate with a beta 1 or beta 4 subunit to form an integrin that interacts with extracellular matrix proteins including members of the laminin family. The alpha 6 beta 4 integrin may promote tumorigenesis, while the alpha 6 beta 1 integrin may negatively regulate erbB2/HER2 signaling. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Oct 2015]

ITGA6 Gene-Disease associations (from GenCC):

• junctional epidermolysis bullosa with pyloric atresia

  Inheritance: AR Classification: STRONG, SUPPORTIVE Submitted by: Genomics England PanelApp, Orphanet, Labcorp Genetics (formerly Invitae)
• epidermolysis bullosa, junctional 6, with pyloric atresia

  Inheritance: AD Classification: LIMITED Submitted by: G2P

ENSG00000226963 (HGNC:):

ACMG classification

Our verdict: Likely_benign. The variant received -1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.4).
• BP7: Synonymous conserved (PhyloP=-0.059 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000210.4. 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
	ITGA6	NM_001394928.1	MANE Plus Clinical	c.12C>T	p.Ala4Ala	synonymous	Exon 1 of 26	NP_001381857.1	P23229-1
	ITGA6	NM_000210.4	MANE Select	c.12C>T	p.Ala4Ala	synonymous	Exon 1 of 26	NP_000201.2	P23229-2
	ITGA6	NM_001079818.3		c.12C>T	p.Ala4Ala	synonymous	Exon 1 of 25	NP_001073286.1	P23229-3

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ITGA6	ENST00000442250.6	TSL:5 MANE Plus Clinical	c.12C>T	p.Ala4Ala	synonymous	Exon 1 of 26	ENSP00000406694.1	P23229-1
	ITGA6	ENST00000684293.1	MANE Select	c.12C>T	p.Ala4Ala	synonymous	Exon 1 of 26	ENSP00000508249.1	P23229-2
	ITGA6	ENST00000264107.12	TSL:1	c.12C>T	p.Ala4Ala	synonymous	Exon 1 of 26	ENSP00000264107.8	A0A8C8KBL6

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 6.93e-7 AC: 1 AN: 1443666 Hom.: 0 Cov.: 34 AF XY: 0.00000139 AC XY: 1 AN XY: 717970

African (AFR) AF: 0.00 AC: 0 AN: 31808

American (AMR) AF: 0.00 AC: 0 AN: 42566

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25702

East Asian (EAS) AF: 0.00 AC: 0 AN: 37842

South Asian (SAS) AF: 0.0000119 AC: 1 AN: 83912

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 51736

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5728

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1104698

Other (OTH) AF: 0.00 AC: 0 AN: 59674

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.40
CADD	Benign	13
DANN	Benign	0.95
PhyloP100		-0.059
PromoterAI		-0.018	Neutral
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Mutation Taster		=100/0	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: rs201026395; hg19: chr2-173292528;