Genetic Variant PRSS55:p.Asn99His (chr8-10529647-A-C) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

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

The NM_198464.4(PRSS55):c.295A>C(p.Asn99His) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000342 in 1,461,892 control chromosomes in the GnomAD database, with no homozygous occurrence. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 0.0000034 ( 0 hom. )

Consequence

PRSS55
NM_198464.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 2.40

Variant links:

Genes affected

PRSS55 (HGNC:30824): (serine protease 55) This gene encodes a member of a group of membrane-anchored chymotrypsin (S1)-like serine proteases. The enocoded protein is primarily expressed in the Leydig and Sertoli cells of the testis and may be involved in male fertility. Alternate splicing results in multiple transcript variants. [provided by RefSeq, Sep 2010]

PRSS55 links:

PRSS51 (HGNC:37321): (serine protease 51) Predicted to enable serine-type endopeptidase activity. Predicted to be involved in proteolysis. Predicted to be located in extracellular region. [provided by Alliance of Genome Resources, Apr 2022]

PRSS51 links:

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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
PRSS55	NM_198464.4 link	c.295A>C	p.Asn99His	missense_variant	Exon 2 of 5	ENST00000328655.8	NP_940866.2	Q6UWB4-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PRSS55	ENST00000328655.8 link	c.295A>C	p.Asn99His	missense_variant	Exon 2 of 5	1	NM_198464.4	ENSP00000333003.3		Q6UWB4-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000342

AC:

AN:

1461892

Hom.:

Cov.:

AF XY:

0.00000413

AC XY:

AN XY:

727248

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

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:

0.00000450

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Feb 26, 2025

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.295A>C (p.N99H) alteration is located in exon 2 (coding exon 2) of the PRSS55 gene. This alteration results from a A to C substitution at nucleotide position 295, causing the asparagine (N) at amino acid position 99 to be replaced by a histidine (H). 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

0.20

BayesDel_addAF

Uncertain

0.038

BayesDel_noAF

Benign

-0.18

CADD

Benign

DANN

Benign

0.96

DEOGEN2

Benign

0.14

T;.

Eigen

Benign

-0.57

Eigen_PC

Benign

-0.74

FATHMM_MKL

Benign

0.12

LIST_S2

Benign

0.24

T;T

M_CAP

Benign

0.053

MetaRNN

Uncertain

0.52

D;D

MetaSVM

Uncertain

-0.084

MutationAssessor

Benign

1.0

L;L

PrimateAI

Benign

0.33

PROVEAN

Benign

-2.1

N;N

REVEL

Uncertain

0.32

Sift

Uncertain

0.010

D;T

Sift4G

Benign

0.18

T;T

Polyphen

1.0

D;.

Vest4

0.28

MutPred

0.77

Gain of sheet (P = 0.1208);Gain of sheet (P = 0.1208);

MVP

0.44

MPC

0.0027

ClinPred

0.43

GERP RS

0.34

Varity_R

0.23

gMVP

0.57

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.070

Details are displayed if max score is > 0.2

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

Publications

No publications associated with this variant yet.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over