NM_002206.3:c.1966A>C

Variant names:

• chr12-55695559-T-G
• rs145740314
• NM_002206.3:c.1966A>C

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_002206.3(ITGA7):​c.1966A>C​(p.Thr656Pro) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000673 in 148,572 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/22 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. T656A) has been classified as Likely benign.

• Frequency: Genomes: 𝑓 0.0000067 (0 hom., cov: 30)
• Consequence: ITGA7 NM_002206.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.838
• Publications: 1 publications found

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 Gene-Disease associations (from GenCC):

• congenital muscular dystrophy due to integrin alpha-7 deficiency

  Inheritance: AR Classification: STRONG, MODERATE, SUPPORTIVE Submitted by: G2P, Labcorp Genetics (formerly Invitae), Orphanet
• congenital fiber-type disproportion myopathy

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.07647726).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_002206.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ITGA7	NM_002206.3	MANE Select	c.1966A>C	p.Thr656Pro	missense	Exon 14 of 25	NP_002197.2
	ITGA7	NM_001410977.1		c.2098A>C	p.Thr700Pro	missense	Exon 15 of 26	NP_001397906.1
	ITGA7	NM_001144996.2		c.1978A>C	p.Thr660Pro	missense	Exon 14 of 25	NP_001138468.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ITGA7	ENST00000257879.11	TSL:1 MANE Select	c.1966A>C	p.Thr656Pro	missense	Exon 14 of 25	ENSP00000257879.7
	ITGA7	ENST00000553804.6	TSL:1	c.1978A>C	p.Thr660Pro	missense	Exon 14 of 25	ENSP00000452120.1
	ITGA7	ENST00000555728.5	TSL:5	c.2098A>C	p.Thr700Pro	missense	Exon 15 of 26	ENSP00000452387.1

Frequencies

GnomAD3 genomes AF: 0.00000673 AC: 1 AN: 148572 Hom.: 0 Cov.: 30

Gnomad AFR AF: 0.00

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: 0.0000148

Gnomad OTH AF: 0.00

GnomAD4 exome Cov.: 33

GnomAD4 genome AF: 0.00000673 AC: 1 AN: 148572 Hom.: 0 Cov.: 30 AF XY: 0.00 AC XY: 0 AN XY: 72438

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.00 AC: 0 AN: 39810

American (AMR) AF: 0.00 AC: 0 AN: 14894

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3446

East Asian (EAS) AF: 0.00 AC: 0 AN: 5028

South Asian (SAS) AF: 0.00 AC: 0 AN: 4668

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10082

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 312

European-Non Finnish (NFE) AF: 0.0000148 AC: 1 AN: 67394

Other (OTH) AF: 0.00 AC: 0 AN: 2038

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5. (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.14
BayesDel_addAF	Benign	-0.17	T
BayesDel_noAF	Benign	-0.48
CADD	Benign	13
DANN	Benign	0.90
DEOGEN2	Benign	0.028	T
Eigen	Benign	-1.3
Eigen_PC	Benign	-1.3
FATHMM_MKL	Benign	0.12	N
LIST_S2	Benign	0.70	T
M_CAP	Benign	0.013	T
MetaRNN	Benign	0.076	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	2.0	M
PhyloP100		-0.84
PrimateAI	Benign	0.34	T
PROVEAN	Uncertain	-3.1	D
REVEL	Benign	0.032
Sift	Uncertain	0.0090	D
Sift4G	Uncertain	0.040	D
Polyphen		0.0040	B
Vest4		0.23
MutPred		0.56		Loss of phosphorylation at T700 (P = 0.0543)
MVP		0.16
MPC		0.26
ClinPred		0.34	T
GERP RS		-4.4
Varity_R		0.27
gMVP		0.64
Mutation Taster		=92/8	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.030		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: rs145740314; hg19: chr12-56089343;