chr17-75724772-T-A

Variant names:

• chr17-75724772-T-A
• rs893157925
• NM_000213.5:c.69T>A

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 2P and 5B. PM2 BP4_Strong BP7

The NM_000213.5(ITGB4):​c.69T>A​(p.Ser23Ser) variant causes a synonymous 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. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. S23S) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 34)
• Consequence: ITGB4 NM_000213.5 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.718
• Publications: 0 publications found

Genes affected

ITGB4 (HGNC:6158): (integrin subunit beta 4) Integrins are heterodimers comprised of alpha and beta subunits, that are noncovalently associated transmembrane glycoprotein receptors. Different combinations of alpha and beta polypeptides form complexes that vary in their ligand-binding specificities. Integrins mediate cell-matrix or cell-cell adhesion, and transduced signals that regulate gene expression and cell growth. This gene encodes the integrin beta 4 subunit, a receptor for the laminins. This subunit tends to associate with alpha 6 subunit and is likely to play a pivotal role in the biology of invasive carcinoma. Mutations in this gene are associated with epidermolysis bullosa with pyloric atresia. Multiple alternatively spliced transcript variants encoding distinct isoforms have been found for this gene. [provided by RefSeq, Jul 2008]

ITGB4 Gene-Disease associations (from GenCC):

• epidermolysis bullosa simplex

  Inheritance: AD Classification: DEFINITIVE Submitted by: G2P
• junctional epidermolysis bullosa with pyloric atresia

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Ambry Genetics, Genomics England PanelApp, G2P, Orphanet
• junctional epidermolysis bullosa, non-Herlitz type

  Inheritance: AR Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae), Genomics England PanelApp
• aplasia cutis congenita

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• epidermolysis bullosa simplex 5C, with pyloric atresia

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• generalized junctional epidermolysis bullosa non-Herlitz type

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• localized junctional epidermolysis bullosa, non-Herlitz type

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• epidermolysis bullosa simplex 1C, localized

  Inheritance: Unknown Classification: LIMITED Submitted by: Labcorp Genetics (formerly Invitae)

ACMG classification

Our verdict: Likely_benign. The variant received -3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.62).
• BP7: Synonymous conserved (PhyloP=-0.718 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000213.5. 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
	ITGB4	NM_000213.5	MANE Select	c.69T>A	p.Ser23Ser	synonymous	Exon 2 of 40	NP_000204.3
	ITGB4	NM_001005619.2		c.69T>A	p.Ser23Ser	synonymous	Exon 2 of 40	NP_001005619.1
	ITGB4	NM_001005731.3		c.69T>A	p.Ser23Ser	synonymous	Exon 2 of 39	NP_001005731.1	P16144-2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ITGB4	ENST00000200181.8	TSL:1 MANE Select	c.69T>A	p.Ser23Ser	synonymous	Exon 2 of 40	ENSP00000200181.3	P16144-1
	ITGB4	ENST00000449880.7	TSL:1	c.69T>A	p.Ser23Ser	synonymous	Exon 2 of 40	ENSP00000400217.2	P16144-3
	ITGB4	ENST00000450894.7	TSL:1	c.69T>A	p.Ser23Ser	synonymous	Exon 2 of 39	ENSP00000405536.3	P16144-2

Frequencies

GnomAD3 genomes Cov.: 34

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 34

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.62
CADD	Benign	0.31
DANN	Benign	0.84
PhyloP100		-0.72
PromoterAI		-0.0060	Neutral

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: rs893157925; hg19: chr17-73720852;