chr12-55694939-G-T

Position:

chr12-55694939-G-T

Variant summary

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

The NM_002206.3(ITGA7):c.2035C>A(p.Leu679Met) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000229 in 1,613,840 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.00020 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00023 ( 0 hom. )

Consequence

ITGA7
NM_002206.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:5

Conservation

PhyloP100: 0.460

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=0.03876382).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
ITGA7	NM_002206.3 linkuse as main transcript	c.2035C>A	p.Leu679Met	missense_variant	15/25	ENST00000257879.11	NP_002197.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
ITGA7	ENST00000257879.11 linkuse as main transcript	c.2035C>A	p.Leu679Met	missense_variant	15/25	1	NM_002206.3	ENSP00000257879	A1	Q13683-7

Frequencies

GnomAD3 genomes

AF:

0.000204

AC:

AN:

152150

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000965

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000131

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:

0.000353

Gnomad OTH

AF:

0.000478

GnomAD3 exomes

AF:

0.000197

AC:

AN:

248890

Hom.:

AF XY:

0.000245

AC XY:

AN XY:

134716

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000116

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:

0.000376

Gnomad OTH exome

AF:

0.000492

GnomAD4 exome

AF:

0.000232

AC:

339

AN:

1461572

Hom.:

Cov.:

AF XY:

0.000235

AC XY:

171

AN XY:

727086

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000671

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000289

Gnomad4 OTH exome

AF:

0.000199

GnomAD4 genome

AF:

0.000204

AC:

AN:

152268

Hom.:

Cov.:

AF XY:

0.000188

AC XY:

AN XY:

74462

show subpopulations

Gnomad4 AFR

AF:

0.0000962

Gnomad4 AMR

AF:

0.000131

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000353

Gnomad4 OTH

AF:

0.000473

Alfa

AF:

0.000300

Hom.:

Bravo

AF:

0.000132

TwinsUK

AF:

0.000809

AC:

ALSPAC

AF:

0.000259

AC:

ESP6500AA

AF:

0.000227

AC:

ESP6500EA

AF:

0.000233

AC:

ExAC

AF:

0.000264

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

EpiCase

AF:

0.000164

EpiControl

AF:

0.000415

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:5

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Congenital muscular dystrophy due to integrin alpha-7 deficiency

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Aug 02, 2022	This sequence change replaces leucine, which is neutral and non-polar, with methionine, which is neutral and non-polar, at codon 679 of the ITGA7 protein (p.Leu679Met). This variant is present in population databases (rs142326016, gnomAD 0.04%). 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: 287413). 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 methionine amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect protein function. 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. -
Uncertain significance, criteria provided, single submitter	clinical testing	Fulgent Genetics, Fulgent Genetics	Oct 31, 2018	- -

not provided

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	Eurofins Ntd Llc (ga)	Aug 15, 2018	- -
Uncertain significance, criteria provided, single submitter	clinical testing	GeneDx	Jul 24, 2024	In silico analysis indicates that this missense variant does not alter protein structure/function; Has not been previously published as pathogenic or benign to our knowledge -

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Aug 22, 2023

Variant summary: ITGA7 c.2035C>A (p.Leu679Met) results in a conservative amino acid change located in the Integrin alpha-2 domain (IPR013649) of the encoded protein sequence. Five of five in-silico tools predict a benign effect of the variant on protein function. The variant allele was found at a frequency of 0.00021 in 280224 control chromosomes (gnomAD). To our knowledge, no occurrence of c.2035C>A in individuals affected with Congenital Muscular Dystrophy Due To Integrin Alpha-7 Deficiency and no experimental evidence demonstrating its impact on protein function have been reported. Four ClinVar submitters have assessed the variant since 2014, and all submitters classified the variant as uncertain significance. Based on the evidence outlined above, the variant was classified as uncertain significance. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.16

BayesDel_addAF

Benign

-0.37

BayesDel_noAF

Benign

-0.42

CADD

Benign

DANN

Uncertain

0.98

DEOGEN2

Benign

0.0079

.;.;T;.;T

Eigen

Benign

-0.39

Eigen_PC

Benign

-0.38

FATHMM_MKL

Benign

0.36

LIST_S2

Benign

0.69

T;T;T;T;T

M_CAP

Benign

0.020

MetaRNN

Benign

0.039

T;T;T;T;T

MetaSVM

Benign

-0.93

MutationAssessor

Uncertain

2.0

.;.;.;.;M

MutationTaster

Benign

0.99

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

PrimateAI

Benign

0.40

PROVEAN

Benign

-0.84

N;N;N;N;N

REVEL

Benign

0.040

Sift

Benign

0.092

T;T;T;T;T

Sift4G

Benign

0.18

T;T;T;T;T

Polyphen

0.35

B;.;.;B;B

Vest4

0.23

MVP

0.51

MPC

0.21

ClinPred

0.040

GERP RS

-0.87

Varity_R

0.083

gMVP

0.30

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