rs9333269

chr10-15607699-T-Cchr10-15607699-T-G

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_003638.3(ITGA8):c.1742A>G(p.Gln581Arg) variant causes a missense 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. 14/20 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. Q581P) has been classified as Benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: ITGA8 NM_003638.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.0950

Genes affected

ITGA8 (HGNC:6144): (integrin subunit alpha 8) Integrins are heterodimeric transmembrane receptor proteins that mediate numerous cellular processes including cell adhesion, cytoskeletal rearrangement, and activation of cell signaling pathways. Integrins are composed of alpha and beta subunits. This gene encodes the alpha 8 subunit of the heterodimeric integrin alpha8beta1 protein. The encoded protein is a single-pass type 1 membrane protein that contains multiple FG-GAP repeats. This repeat is predicted to fold into a beta propeller structure. This gene regulates the recruitment of mesenchymal cells into epithelial structures, mediates cell-cell interactions, and regulates neurite outgrowth of sensory and motor neurons. The integrin alpha8beta1 protein thus plays an important role in wound-healing and organogenesis. Mutations in this gene have been associated with renal hypodysplasia/aplasia-1 (RHDA1) and with several animal models of chronic kidney disease. Alternate splicing results in multiple transcript variants encoding distinct isoforms. [provided by RefSeq, Apr 2014]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.08250135).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
ITGA8	NM_003638.3	c.1742A>G	p.Gln581Arg	missense_variant	17/30	ENST00000378076.4
ITGA8	NM_001291494.2	c.1697A>G	p.Gln566Arg	missense_variant	16/29
ITGA8	XM_011519752.3	c.1742A>G	p.Gln581Arg	missense_variant	17/24

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ITGA8	ENST00000378076.4	c.1742A>G	p.Gln581Arg	missense_variant	17/30	1	NM_003638.3	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.072
BayesDel_addAF	Benign	-0.30	T
BayesDel_noAF	Benign	-0.68
Cadd	Benign	3.4
Dann	Benign	0.11
DEOGEN2	Benign	0.042	T
Eigen	Benign	-1.5
Eigen_PC	Benign	-1.4
FATHMM_MKL	Benign	0.63	D
LIST_S2	Benign	0.54	T
M_CAP	Benign	0.0091	T
MetaRNN	Benign	0.083	T
MetaSVM	Benign	-0.98	T
MutationAssessor	Benign	1.7	L
MutationTaster	Benign	1.0	N
PrimateAI	Benign	0.21	T
PROVEAN	Benign	-0.38	N
REVEL	Benign	0.065
Sift	Benign	1.0	T
Sift4G	Benign	1.0	T
Polyphen		0.0020	B
Vest4		0.14
MutPred		0.63		Gain of MoRF binding (P = 0.0181);
MVP		0.26
MPC		0.075
ClinPred		0.042	T
GERP RS		-2.0
Varity_R		0.033
gMVP		0.54

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: rs9333269; hg19: chr10-15649698;