MPO p.Tyr173Cys

Variant names:

Your query was ambiguous. Multiple possible variants found:

Variant summary

Our verdict is Likely pathogenic. The variant received 6 ACMG points: 7P and 1B. PS3PP3_ModeratePP5BS2_Supporting

The NM_000250.2(MPO):c.518A>G(p.Tyr173Cys) variant causes a missense change. The variant allele was found at a frequency of 0.000843 in 1,614,076 control chromosomes in the GnomAD database, including 2 homozygotes. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). ClinVar reports functional evidence for this variant: "SCV003927695: Published functional studies demonstrate a damaging effect: lack of mature MPO, retention in the endoplasmic reticulum, and significantly reduced MPO activity (DeLeo et al., 1998)". Another variant affecting the same amino acid position, but resulting in a different missense (i.e. Y173H) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.00050 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00088 ( 2 hom. )

Consequence

MPO
NM_000250.2 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications P:4U:1

Conservation

PhyloP100: 3.62

Publications

23 publications found

Variant links:

Genes affected

MPO (HGNC:7218): (myeloperoxidase) Myeloperoxidase (MPO) is a heme protein synthesized during myeloid differentiation that constitutes the major component of neutrophil azurophilic granules. Produced as a single chain precursor, myeloperoxidase is subsequently cleaved into a light and heavy chain. The mature myeloperoxidase is a tetramer composed of 2 light chains and 2 heavy chains. This enzyme produces hypohalous acids central to the microbicidal activity of neutrophils. [provided by RefSeq, Nov 2014]

MPO links:

Genome browser will be placed here

new If you want to explore the variant's impact on the transcript NM_000250.2, check out the Mutation Effect Viewer. This is especially useful for frameshift variants or if you want to visualize the effect of exon loss / intron retention.

ACMG classification

Classification was made for transcript

Our verdict: Likely_pathogenic. The variant received 6 ACMG points.

PS3

PS3 evidence extracted from ClinVar submissions: SCV003927695: Published functional studies demonstrate a damaging effect: lack of mature MPO, retention in the endoplasmic reticulum, and significantly reduced MPO activity (DeLeo et al., 1998)

PP3

MetaRNN computational evidence supports a deleterious effect, 0.939

PP5

Variant 17-58279553-T-C is Pathogenic according to our data. Variant chr17-58279553-T-C is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 3627.

BS2

High Homozygotes in GnomAdExome4 at 2 AR geneVariant has number of homozygotes lower than other variant known as pathogenic in the gene, so the strength is limited to Supporting.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000250.2. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MPO	NM_000250.2	MANE Select	c.518A>G	p.Tyr173Cys	missense	Exon 4 of 12	NP_000241.1	P05164-1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MPO	ENST00000225275.4	TSL:1 MANE Select	c.518A>G	p.Tyr173Cys	missense	Exon 4 of 12	ENSP00000225275.3	P05164-1
	MPO	ENST00000581022.1	TSL:2	n.-154A>G		upstream_gene	N/A

Frequencies

GnomAD3 genomes

AF:

0.000499

AC:

AN:

152182

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000145

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000654

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:

0.00101

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.000458

AC:

115

AN:

250860

AF XY:

0.000472

show subpopulations

Gnomad AFR exome

AF:

0.000124

Gnomad AMR exome

AF:

0.0000579

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.0000927

Gnomad NFE exome

AF:

0.000935

Gnomad OTH exome

AF:

0.000490

GnomAD4 exome

AF:

0.000879

AC:

1285

AN:

1461776

Hom.:

Cov.:

AF XY:

0.000854

AC XY:

621

AN XY:

727188

show subpopulations

African (AFR)

AF:

0.000119

AC:

AN:

33480

American (AMR)

AF:

0.0000671

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.0000383

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.00

AC:

AN:

86246

European-Finnish (FIN)

AF:

0.0000938

AC:

AN:

53330

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.00112

AC:

1245

AN:

1111998

Other (OTH)

AF:

0.000447

AC:

AN:

60394

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.478

Heterozygous variant carriers

194

292

389

486

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

104

156

208

260

<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

AF:

0.000499

AC:

AN:

152300

Hom.:

Cov.:

AF XY:

0.000389

AC XY:

AN XY:

74470

show subpopulations

African (AFR)

AF:

0.000144

AC:

AN:

41572

American (AMR)

AF:

0.0000653

AC:

AN:

15306

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5180

South Asian (SAS)

AF:

0.00

AC:

AN:

4826

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10608

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.00101

AC:

AN:

68016

Other (OTH)

AF:

0.00

AC:

AN:

2116

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.509

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome 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

Alfa

AF:

0.000912

Hom.:

Bravo

AF:

0.000476

EpiCase

AF:

0.00104

EpiControl

AF:

0.00119

ClinVar

ClinVar submissions

Significance:Conflicting classifications of pathogenicity

Revision:criteria provided, conflicting classifications

View on ClinVar

Pathogenic

VUS

Benign

Condition

not provided (3)

Myeloperoxidase deficiency (1)

Myeloperoxidase deficiency;C1863052:Alzheimer disease type 1 (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.95

BayesDel_addAF

Uncertain

0.11

BayesDel_noAF

Pathogenic

0.34

CADD

Pathogenic

(source)

DANN

Uncertain

1.0

DEOGEN2

Pathogenic

0.91

Eigen

Pathogenic

0.77

Eigen_PC

Uncertain

0.63

FATHMM_MKL

Uncertain

0.96

LIST_S2

Uncertain

0.96

M_CAP

Pathogenic

0.31

MetaRNN

Pathogenic

0.94

MetaSVM

Pathogenic

0.87

MutationAssessor

Pathogenic

3.9

PhyloP100

3.6

PrimateAI

Uncertain

0.67

PROVEAN

Pathogenic

-7.4

REVEL

Pathogenic

0.91

Sift

Pathogenic

0.0

Sift4G

Pathogenic

0.0

Varity_R

0.98

gMVP

0.98

Mutation Taster

=62/38

disease causing (ClinVar)

(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

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over