Genetic Variant ITGAD:p.Pro52Ala (chr16-31397375-C-G) – ACMG Classification: Uncertain_significance (3 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 3 ACMG points: 3P and 0B. PM2PP3

The NM_005353.3(ITGAD):c.154C>G(p.Pro52Ala) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000069 in 1,449,044 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic 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. P52T) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 31)

Exomes 𝑓: 6.9e-7 ( 0 hom. )

Consequence

ITGAD
NM_005353.3 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 2.35

Publications

0 publications found

Variant links:

Genes affected

ITGAD (HGNC:6146): (integrin subunit alpha D) This gene belongs to the beta-2 integrin family of membrane glycoproteins, which are are composed of non-covalently linked alpha and beta subunits to form a heterodimer. It encodes the alpha subunit of the cell surface heterodimers and is involved in the activation and adhesion functions of leukocytes. The gene is located about 11kb downstream of the integrin subunit alpha X gene, another member of the integrin family. It is expressed in the tissue and circulating myeloid leukocytes. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Dec 2015]

ITGAD links:

ENSG00000308290 (HGNC:):

ENSG00000308290 links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 3 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.81

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ITGAD	NM_005353.3 link	c.154C>G	p.Pro52Ala	missense_variant	Exon 3 of 30	ENST00000389202.3	NP_005344.2	Q13349Q59H14

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
ITGAD	ENST00000389202.3 link	c.154C>G	p.Pro52Ala	missense_variant	Exon 3 of 30	1	NM_005353.3	ENSP00000373854.2	Q13349
ITGAD	ENST00000444228.2 link	n.180C>G		non_coding_transcript_exon_variant	Exon 3 of 9	2
ENSG00000308290	ENST00000833001.1 link	n.454-6176G>C		intron_variant	Intron 1 of 1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.90e-7

AC:

AN:

1449044

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

719578

show subpopulations

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

African (AFR)

AF:

0.00

AC:

AN:

33266

American (AMR)

AF:

0.00

AC:

AN:

43186

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25786

East Asian (EAS)

AF:

0.00

AC:

AN:

39056

South Asian (SAS)

AF:

0.00

AC:

AN:

83866

European-Finnish (FIN)

AF:

0.00

AC:

AN:

51886

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5746

European-Non Finnish (NFE)

AF:

9.04e-7

AC:

AN:

1106434

Other (OTH)

AF:

0.00

AC:

AN:

59818

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0.000000), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.325

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.36

BayesDel_addAF

Uncertain

0.088

BayesDel_noAF

Benign

-0.11

CADD

Uncertain

(source)

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.79

Eigen

Pathogenic

0.70

Eigen_PC

Uncertain

0.57

FATHMM_MKL

Uncertain

0.88

LIST_S2

Uncertain

0.95

M_CAP

Benign

0.035

MetaRNN

Pathogenic

0.81

MetaSVM

Uncertain

0.70

MutationAssessor

Pathogenic

3.6

PhyloP100

2.3

PrimateAI

Benign

0.47

PROVEAN

Pathogenic

-7.6

REVEL

Uncertain

0.47

Sift

Pathogenic

0.0

Sift4G

Pathogenic

0.0

Polyphen

1.0

Vest4

0.56

MutPred

0.74

Gain of sheet (P = 0.0344);

MVP

0.95

MPC

0.72

ClinPred

0.99

GERP RS

4.0

Varity_R

0.64

gMVP

0.84

Mutation Taster

=76/24

polymorphism

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over