Genetic Variant ZPBP:p.Lys243Ile (chr7-50018295-T-A) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_007009.3(ZPBP):c.728A>T(p.Lys243Ile) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000087 in 1,609,750 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000089 ( 0 hom. )

Consequence

ZPBP
NM_007009.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 2.85

Publications

0 publications found

Variant links:

Genes affected

ZPBP (HGNC:15662): (zona pellucida binding protein) ZPBP is one of several proteins that are thought to participate in secondary binding between acrosome-reacted sperm and the egg-specific extracellular matrix, the zona pellucida (McLeskey et al., 1998 [PubMed 9378618]).[supplied by OMIM, Aug 2008]

ZPBP Gene-Disease associations (from GenCC):

spermatogenic failure 66
Inheritance: Unknown Classification: LIMITED Submitted by: Labcorp Genetics (formerly Invitae)

ZPBP links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 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
ZPBP	NM_007009.3 link	c.728A>T	p.Lys243Ile	missense_variant	Exon 6 of 8	ENST00000046087.7	NP_008940.2	Q9BS86-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
ZPBP	ENST00000046087.7 link	c.728A>T	p.Lys243Ile	missense_variant	Exon 6 of 8	1	NM_007009.3	ENSP00000046087.2	Q9BS86-1
ZPBP	ENST00000419417.5 link	c.725A>T	p.Lys242Ile	missense_variant	Exon 6 of 8	1		ENSP00000402071.1	Q9BS86-2
ZPBP	ENST00000491129.5 link	n.241-34776A>T		intron_variant	Intron 1 of 3	3

Frequencies

GnomAD3 genomes

AF:

0.00000658

AC:

AN:

151968

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

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:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000120

AC:

AN:

250148

AF XY:

0.00

show subpopulations

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 FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000265

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000892

AC:

AN:

1457782

Hom.:

Cov.:

AF XY:

0.00000551

AC XY:

AN XY:

725332

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33336

American (AMR)

AF:

0.00

AC:

AN:

44600

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26040

East Asian (EAS)

AF:

0.00

AC:

AN:

39526

South Asian (SAS)

AF:

0.00

AC:

AN:

86126

European-Finnish (FIN)

AF:

0.00

AC:

AN:

52960

Middle Eastern (MID)

AF:

0.00

AC:

AN:

4672

European-Non Finnish (NFE)

AF:

0.0000108

AC:

AN:

1110400

Other (OTH)

AF:

0.0000166

AC:

AN:

60122

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.471

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.00000658

AC:

AN:

151968

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74212

show subpopulations

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

African (AFR)

AF:

0.00

AC:

AN:

41424

American (AMR)

AF:

0.00

AC:

AN:

15214

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3466

East Asian (EAS)

AF:

0.00

AC:

AN:

5182

South Asian (SAS)

AF:

0.00

AC:

AN:

4830

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10612

Middle Eastern (MID)

AF:

0.00

AC:

AN:

314

European-Non Finnish (NFE)

AF:

0.0000147

AC:

AN:

67930

Other (OTH)

AF:

0.00

AC:

AN:

2086

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 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: 0.375

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.0000113

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000233

AC:

ExAC

AF:

0.0000247

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

May 01, 2025

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.728A>T (p.K243I) alteration is located in exon 6 (coding exon 6) of the ZPBP gene. This alteration results from a A to T substitution at nucleotide position 728, causing the lysine (K) at amino acid position 243 to be replaced by an isoleucine (I). 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

Benign

-0.10

BayesDel_noAF

Benign

-0.32

CADD

Uncertain

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.31

T;.

Eigen

Uncertain

0.50

Eigen_PC

Uncertain

0.45

FATHMM_MKL

Uncertain

0.78

LIST_S2

Benign

0.75

T;T

M_CAP

Benign

0.032

MetaRNN

Uncertain

0.69

D;D

MetaSVM

Benign

-0.56

MutationAssessor

Uncertain

2.4

M;.

PhyloP100

2.9

PrimateAI

Uncertain

0.50

PROVEAN

Uncertain

-3.3

D;D

REVEL

Benign

0.18

Sift

Benign

0.056

T;T

Sift4G

Uncertain

0.0060

D;D

Polyphen

1.0

D;.

Vest4

0.58

MVP

0.66

MPC

0.95

ClinPred

0.95

GERP RS

4.1

Varity_R

0.25

gMVP

0.51

Mutation Taster

=83/17

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.36

Details are displayed if max score is > 0.2

DS_AL_spliceai

0.36

Position offset: 21

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

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7-50018295-T-A

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over