Genetic Variant ITGAX:p.Leu81Arg (chr16-31356723-T-G) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

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

The NM_000887.5(ITGAX):c.242T>G(p.Leu81Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000309 in 1,583,798 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000033 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000031 ( 0 hom. )

Consequence

ITGAX
NM_000887.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.538

Variant links:

Genes affected

ITGAX (HGNC:6152): (integrin subunit alpha X) This gene encodes the integrin alpha X chain protein. Integrins are heterodimeric integral membrane proteins composed of an alpha chain and a beta chain. This protein combines with the beta 2 chain (ITGB2) to form a leukocyte-specific integrin referred to as inactivated-C3b (iC3b) receptor 4 (CR4). The alpha X beta 2 complex seems to overlap the properties of the alpha M beta 2 integrin in the adherence of neutrophils and monocytes to stimulated endothelium cells, and in the phagocytosis of complement coated particles. Two transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Nov 2013]

ITGAX links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ITGAX	NM_000887.5 link	c.242T>G	p.Leu81Arg	missense_variant	Exon 3 of 30	ENST00000268296.9	NP_000878.2	P20702

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
ITGAX	ENST00000268296.9 link	c.242T>G	p.Leu81Arg	missense_variant	Exon 3 of 30	1	NM_000887.5	ENSP00000268296.5	P20702
ITGAX	ENST00000562522.2 link	c.242T>G	p.Leu81Arg	missense_variant	Exon 3 of 31	1		ENSP00000454623.1	H3BN02
ITGAX	ENST00000567409.1 link	n.309T>G		non_coding_transcript_exon_variant	Exon 3 of 4	1
ITGAX	ENST00000562918.5 link	c.242T>G	p.Leu81Arg	missense_variant	Exon 3 of 5	2		ENSP00000483860.1	A0A087X131

Frequencies

GnomAD3 genomes

AF:

0.0000329

AC:

AN:

152134

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

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:

0.0000441

Gnomad OTH

AF:

0.000478

GnomAD3 exomes

AF:

0.0000152

AC:

AN:

197444

Hom.:

AF XY:

0.00000945

AC XY:

AN XY:

105792

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000370

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:

0.0000233

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000307

AC:

AN:

1431664

Hom.:

Cov.:

AF XY:

0.0000240

AC XY:

AN XY:

709110

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000259

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000346

Gnomad4 OTH exome

AF:

0.0000841

GnomAD4 genome

AF:

0.0000329

AC:

AN:

152134

Hom.:

Cov.:

AF XY:

0.0000404

AC XY:

AN XY:

74316

show subpopulations

Gnomad4 AFR

AF:

0.0000241

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000441

Gnomad4 OTH

AF:

0.000478

Bravo

AF:

0.0000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Oct 18, 2021

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.242T>G (p.L81R) alteration is located in exon 3 (coding exon 3) of the ITGAX gene. This alteration results from a T to G substitution at nucleotide position 242, causing the leucine (L) at amino acid position 81 to be replaced by an arginine (R). 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

0.24

BayesDel_addAF

Uncertain

0.099

BayesDel_noAF

Uncertain

0.020

CADD

Benign

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.58

D;T;.

Eigen

Benign

0.14

Eigen_PC

Benign

-0.054

FATHMM_MKL

Benign

0.29

LIST_S2

Uncertain

0.91

D;D;D

M_CAP

Uncertain

0.14

MetaRNN

Uncertain

0.53

D;D;D

MetaSVM

Uncertain

-0.23

MutationAssessor

Pathogenic

3.5

H;.;.

PrimateAI

Benign

0.38

PROVEAN

Pathogenic

-5.1

D;.;D

REVEL

Uncertain

0.42

Sift

Pathogenic

0.0

D;.;D

Sift4G

Pathogenic

0.0010

D;D;D

Polyphen

1.0

D;.;.

Vest4

0.54

MutPred

0.52

Gain of disorder (P = 0.0546);Gain of disorder (P = 0.0546);Gain of disorder (P = 0.0546);

MVP

0.85

MPC

0.68

ClinPred

0.77

GERP RS

5.4

Varity_R

0.82

gMVP

0.69

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over