rs17117879

Positions:

• chr12-55688228-A-G

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_Strong BP6_Very_Strong BS1 BS2

The NM_002206.3(ITGA7):​c.3031T>C​(p.Leu1011Leu) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00254 in 1,614,116 control chromosomes in the GnomAD database, including 90 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

• Frequency:
  • Genomes: 𝑓 0.013 (40 hom., cov: 31)
  • Exomes 𝑓: 0.0014 (50 hom.)
• Consequence: ITGA7 NM_002206.3 synonymous
• Clinical Significance: Benign criteria provided, multiple submitters, no conflicts B:5
• Conservation: PhyloP100: 1.07

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 (HGNC:):

ACMG classification

Verdict is Benign. Variant got -20 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.55).
• BP6: Variant 12-55688228-A-G is Benign according to our data. Variant chr12-55688228-A-G is described in ClinVar as [Benign]. Clinvar id is 129295.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BS1: Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.0133 (2025/152260) while in subpopulation AFR AF= 0.0455 (1888/41534). AF 95% confidence interval is 0.0437. There are 40 homozygotes in gnomad4. There are 970 alleles in male gnomad4 subpopulation. Median coverage is 31. This position pass quality control queck.
• BS2: High Homozygotes in GnomAd4 at 40 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
ITGA7	NM_002206.3	c.3031T>C	p.Leu1011Leu	synonymous_variant	23/25	ENST00000257879.11	NP_002197.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
ITGA7	ENST00000257879.11	c.3031T>C	p.Leu1011Leu	synonymous_variant	23/25	1	NM_002206.3	ENSP00000257879.7

Frequencies

GnomAD3 genomes AF: 0.0133 AC: 2020 AN: 152142 Hom.: 39 Cov.: 31

Gnomad AFR AF: 0.0455

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00582

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000207

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.000250

Gnomad OTH AF: 0.0144

GnomAD3 exomes AF: 0.00360 AC: 905 AN: 251484 Hom.: 20 AF XY: 0.00276 AC XY: 375 AN XY: 135920

Gnomad AFR exome AF: 0.0474

Gnomad AMR exome AF: 0.00275

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.000163

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.000185

Gnomad OTH exome AF: 0.00212

GnomAD4 exome AF: 0.00142 AC: 2082 AN: 1461856 Hom.: 50 Cov.: 32 AF XY: 0.00125 AC XY: 907 AN XY: 727240

Gnomad4 AFR exome AF: 0.0473

Gnomad4 AMR exome AF: 0.00324

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.000151

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.000121

Gnomad4 OTH exome AF: 0.00320

GnomAD4 genome AF: 0.0133 AC: 2025 AN: 152260 Hom.: 40 Cov.: 31 AF XY: 0.0130 AC XY: 970 AN XY: 74462

Gnomad4 AFR AF: 0.0455

Gnomad4 AMR AF: 0.00582

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.000207

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.000250

Gnomad4 OTH AF: 0.0142

Alfa AF: 0.00684 Hom.: 9

Bravo AF: 0.0155

Asia WGS AF: 0.00231 AC: 8 AN: 3478

EpiCase AF: 0.000436

EpiControl AF: 0.000119

ClinVar

Significance: Benign

Submissions summary: Benign:5

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not specified Benign:2

Benign, criteria provided, single submitter	clinical testing	GeneDx	Jul 15, 2016	This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -
Likely benign, no assertion criteria provided	clinical testing	Genetic Services Laboratory, University of Chicago	-	Likely benign based on allele frequency in 1000 Genomes Project or ESP global frequency and its presence in a patient with a rare or unrelated disease phenotype. NOT Sanger confirmed. -

not provided Benign:2

Benign, criteria provided, single submitter	not provided	Breakthrough Genomics, Breakthrough Genomics	-	- -
Benign, criteria provided, single submitter	clinical testing	Athena Diagnostics	Nov 15, 2017	- -

Congenital muscular dystrophy due to integrin alpha-7 deficiency Benign:1

Benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 19, 2024

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.55
CADD	Benign	3.5
DANN	Benign	0.82

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

Other links and lift over

dbSNP: rs17117879; hg19: chr12-56082012;