2-186636128-C-A

Position:

• chr2-186636128-C-A

Variant summary

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

The NM_002210.5(ITGAV):​c.678C>A​(p.Asp226Glu) 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. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: ITGAV NM_002210.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.594

Genes affected

ITGAV (HGNC:6150): (integrin subunit alpha V) The product of this gene belongs to the integrin alpha chain family. Integrins are heterodimeric integral membrane proteins composed of an alpha subunit and a beta subunit that function in cell surface adhesion and signaling. The encoded preproprotein is proteolytically processed to generate light and heavy chains that comprise the alpha V subunit. This subunit associates with beta 1, beta 3, beta 5, beta 6 and beta 8 subunits. The heterodimer consisting of alpha V and beta 3 subunits is also known as the vitronectin receptor. This integrin may regulate angiogenesis and cancer progression. Alternative splicing results in multiple transcript variants. Note that the integrin alpha 5 and integrin alpha V subunits are encoded by distinct genes. [provided by RefSeq, Oct 2015]

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=0.14284217).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
ITGAV	NM_002210.5	c.678C>A	p.Asp226Glu	missense_variant	7/30	ENST00000261023.8	NP_002201.2
ITGAV	NM_001145000.3	c.570C>A	p.Asp190Glu	missense_variant	5/28		NP_001138472.2
ITGAV	NM_001144999.3	c.540C>A	p.Asp180Glu	missense_variant	7/30		NP_001138471.2
ITGAV	XM_047444225.1	c.-166C>A		5_prime_UTR_variant	3/26		XP_047300181.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
ITGAV	ENST00000261023.8	c.678C>A	p.Asp226Glu	missense_variant	7/30	1	NM_002210.5	ENSP00000261023.3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD3 exomes AF: 0.00000398 AC: 1 AN: 251030 Hom.: 0 AF XY: 0.00000737 AC XY: 1 AN XY: 135690

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: 0.00000881

Gnomad OTH exome AF: 0.00

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jan 23, 2024

The c.678C>A (p.D226E) alteration is located in exon 7 (coding exon 7) of the ITGAV gene. This alteration results from a C to A substitution at nucleotide position 678, causing the aspartic acid (D) at amino acid position 226 to be replaced by a glutamic acid (E). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.19
BayesDel_addAF	Benign	-0.20	T
BayesDel_noAF	Benign	-0.52
CADD	Benign	17
DANN	Uncertain	0.98
DEOGEN2	Benign	0.17	T;.;.
Eigen	Benign	-0.58
Eigen_PC	Benign	-0.46
FATHMM_MKL	Uncertain	0.88	D
LIST_S2	Benign	0.72	T;T;T
M_CAP	Benign	0.0068	T
MetaRNN	Benign	0.14	T;T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	1.8	L;.;.
PrimateAI	Uncertain	0.52	T
PROVEAN	Benign	-0.48	N;N;N
REVEL	Benign	0.079
Sift	Benign	0.67	T;T;T
Sift4G	Benign	0.68	T;T;T
Polyphen		0.72	P;B;.
Vest4		0.57
MutPred		0.32		Gain of ubiquitination at K224 (P = 0.1162);.;.;
MVP		0.33
MPC		0.21
ClinPred		0.18	T
GERP RS		3.8
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.18
gMVP		0.64

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: rs1167954842; hg19: chr2-187500855;