rs544939783

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_002206.3(ITGA7):c.7G>A(p.Gly3Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000235 in 1,573,976 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.000020 ( 0 hom., cov: 31)

Exomes 𝑓: 0.000024 ( 1 hom. )

Consequence

ITGA7
NM_002206.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:4

Conservation

PhyloP100: 0.730

Variant links:

Genes affected

ITGA7 (HGNC:6143): (integrin subunit alpha 7) The protein encoded by this gene belongs to the integrin alpha chain family. Integrins are heterodimeric integral membrane proteins composed of an alpha chain and a beta chain. They mediate a wide spectrum of cell-cell and cell-matrix interactions, and thus play a role in cell migration, morphologic development, differentiation, and metastasis. This protein functions as a receptor for the basement membrane protein laminin-1. It is mainly expressed in skeletal and cardiac muscles and may be involved in differentiation and migration processes during myogenesis. Defects in this gene are associated with congenital myopathy. Alternatively spliced transcript variants encoding different isoforms have been noted for this gene. [provided by RefSeq, Feb 2009]

ITGA7 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.03703463).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
ITGA7	NM_002206.3 linkuse as main transcript	c.7G>A	p.Gly3Arg	missense_variant	1/25	ENST00000257879.11

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ITGA7	ENST00000257879.11 linkuse as main transcript	c.7G>A	p.Gly3Arg	missense_variant	1/25	1	NM_002206.3	A1	Q13683-7

Frequencies

GnomAD3 genomes

AF:

0.0000197

AC:

AN:

152156

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000724

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.00000558

AC:

AN:

179274

Hom.:

AF XY:

0.00

AC XY:

AN XY:

96274

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.000210

GnomAD4 exome

AF:

0.0000239

AC:

AN:

1421702

Hom.:

Cov.:

AF XY:

0.0000199

AC XY:

AN XY:

703540

show subpopulations

Gnomad4 AFR exome

AF:

0.000554

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000123

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

9.16e-7

Gnomad4 OTH exome

AF:

0.000221

GnomAD4 genome

AF:

0.0000197

AC:

AN:

152274

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74438

show subpopulations

Gnomad4 AFR

AF:

0.0000722

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.00000756

ExAC

AF:

0.0000168

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:4

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	Ambry Genetics	Jul 21, 2021	The c.7G>A (p.G3R) alteration is located in exon 1 (coding exon 1) of the ITGA7 gene. This alteration results from a G to A substitution at nucleotide position 7, causing the glycine (G) at amino acid position 3 to be replaced by an arginine (R). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -
Uncertain significance, criteria provided, single submitter	clinical testing	Genetic Services Laboratory, University of Chicago	Sep 02, 2016	- -

Congenital muscular dystrophy due to integrin alpha-7 deficiency

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	Revvity Omics, Revvity	Jul 16, 2019	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Invitae	Aug 23, 2022	This sequence change replaces glycine, which is neutral and non-polar, with arginine, which is basic and polar, at codon 3 of the ITGA7 protein (p.Gly3Arg). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with ITGA7-related conditions. ClinVar contains an entry for this variant (Variation ID: 435534). Algorithms developed to predict the effect of missense changes on protein structure and function output the following: SIFT: "Tolerated"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0". The arginine amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect protein function. Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may create or strengthen a splice site. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.17

BayesDel_addAF

Benign

-0.15

BayesDel_noAF

Benign

-0.46

Cadd

Benign

Dann

Uncertain

0.99

Eigen

Benign

-0.91

Eigen_PC

Benign

-0.86

FATHMM_MKL

Benign

0.14

LIST_S2

Benign

0.72

T;T;T;T

M_CAP

Benign

0.032

MetaRNN

Benign

0.037

T;T;T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

0.14

N;N;.;N

MutationTaster

Benign

1.0

N;N;N;N;N;N;N;N

PrimateAI

Benign

0.46

PROVEAN

Benign

-1.5

N;N;N;N

REVEL

Benign

0.025

Sift

Benign

0.12

T;T;T;T

Sift4G

Benign

0.092

T;T;T;T

Polyphen

0.013

B;.;.;.

Vest4

0.30

MutPred

0.29

Gain of methylation at G3 (P = 0.0024);Gain of methylation at G3 (P = 0.0024);Gain of methylation at G3 (P = 0.0024);Gain of methylation at G3 (P = 0.0024);

MVP

0.62

MPC

0.22

ClinPred

0.18

GERP RS

2.2

Varity_R

0.060

gMVP

0.27

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

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over