chr3-37481544-T-C

Position:

• chr3-37481544-T-C

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_002207.3(ITGA9):​c.481T>C​(p.Phe161Leu) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 12/21 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: ITGA9 NM_002207.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.60

Genes affected

ITGA9 (HGNC:6145): (integrin subunit alpha 9) This gene encodes an alpha integrin. Integrins are heterodimeric integral membrane glycoproteins composed of an alpha chain and a beta chain that mediate cell-cell and cell-matrix adhesion. The protein encoded by this gene, when bound to the beta 1 chain, forms an integrin that is a receptor for VCAM1, cytotactin and osteopontin. Expression of this gene has been found to be upregulated in small cell lung cancers. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.30474102).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
ITGA9	NM_002207.3	c.481T>C	p.Phe161Leu	missense_variant	4/28	ENST00000264741.10	NP_002198.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
ITGA9	ENST00000264741.10	c.481T>C	p.Phe161Leu	missense_variant	4/28	1	NM_002207.3	ENSP00000264741	P1
ITGA9	ENST00000422441.5	c.481T>C	p.Phe161Leu	missense_variant	4/16	1		ENSP00000397258

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

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

Aug 02, 2023

The c.481T>C (p.F161L) alteration is located in exon 4 (coding exon 4) of the ITGA9 gene. This alteration results from a T to C substitution at nucleotide position 481, causing the phenylalanine (F) at amino acid position 161 to be replaced by a leucine (L). 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	Pathogenic	0.84
BayesDel_addAF	Benign	-0.051	T
BayesDel_noAF	Benign	-0.31
CADD	Benign	23
DANN	Uncertain	0.98
DEOGEN2	Benign	0.0063	T;T
Eigen	Benign	-0.18
Eigen_PC	Benign	0.053
FATHMM_MKL	Uncertain	0.95	D
LIST_S2	Benign	0.78	T;T
M_CAP	Benign	0.012	T
MetaRNN	Benign	0.30	T;T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	0.36	.;N
MutationTaster	Benign	1.0	D;D
PrimateAI	Pathogenic	0.81	D
PROVEAN	Benign	-0.66	N;N
REVEL	Benign	0.15
Sift	Benign	0.72	T;T
Sift4G	Benign	0.41	T;T
Polyphen		0.029	B;B
Vest4		0.47
MutPred		0.26		Loss of sheet (P = 0.1501);Loss of sheet (P = 0.1501);
MVP		0.50
MPC		0.24
ClinPred		0.74	D
GERP RS		5.5
Varity_R		0.18
gMVP		0.84

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: rs1698555180; hg19: chr3-37523035;