Variant 19-7632516-C-G details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_174895.3(PCP2):c.168G>C(p.Gln56His) variant causes a missense, splice region change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000342 in 1,460,694 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/24 in silico tools predict a benign outcome for this variant. 2/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000034 ( 0 hom. )

Consequence

PCP2
NM_174895.3 missense, splice_region

Scores

Splicing: ADA: 0.0007704

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 1.42

Variant links:

Genes affected

PCP2 (HGNC:30209): (Purkinje cell protein 2) Predicted to enable guanyl-nucleotide exchange factor activity. Predicted to be involved in regulation of catalytic activity. Predicted to act upstream of or within rhodopsin mediated signaling pathway. Predicted to be located in neuronal cell body. [provided by Alliance of Genome Resources, Apr 2022]

PCP2 links:

ENSG00000268400 (HGNC:):

ENSG00000268400 links:

STXBP2 (HGNC:11445): (syntaxin binding protein 2) This gene encodes a member of the STXBP/unc-18/SEC1 family. The encoded protein is involved in intracellular trafficking, control of SNARE (soluble NSF attachment protein receptor) complex assembly, and the release of cytotoxic granules by natural killer cells. Mutations in this gene are associated with familial hemophagocytic lymphohistiocytosis. Alternatively spliced transcript variants encoding different isoforms have been noted for this gene. [provided by RefSeq, Jan 2013]

STXBP2 links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.11208469).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
PCP2	NM_174895.3 link	c.168G>C	p.Gln56His	missense_variant, splice_region_variant	3/4	ENST00000311069.6	NP_777555.1	Q8IVA1-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
PCP2	ENST00000311069.6 link	c.168G>C	p.Gln56His	missense_variant, splice_region_variant	3/4	1	NM_174895.3	ENSP00000310585.4		Q8IVA1-1
ENSG00000268400	ENST00000698368.1 link	n.114+1857C>G		intron_variant				ENSP00000513686.1		A0A8V8TM65

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.0000120

AC:

AN:

250336

Hom.:

AF XY:

0.00000739

AC XY:

AN XY:

135386

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 SAS exome

AF:

0.0000327

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000177

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000342

AC:

AN:

1460694

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

726694

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:

0.0000116

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000360

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

ExAC

AF:

0.0000165

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Nov 17, 2023

The c.168G>C (p.Q56H) alteration is located in exon 3 (coding exon 3) of the PCP2 gene. This alteration results from a G to C substitution at nucleotide position 168, causing the glutamine (Q) at amino acid position 56 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

0.099

BayesDel_addAF

Benign

-0.31

BayesDel_noAF

Benign

-0.59

CADD

Benign

DANN

Uncertain

0.98

DEOGEN2

Benign

0.15

.;T

Eigen

Benign

-0.37

Eigen_PC

Benign

-0.32

FATHMM_MKL

Benign

0.73

LIST_S2

Benign

0.24

T;T

M_CAP

Benign

0.0034

MetaRNN

Benign

0.11

T;T

MetaSVM

Benign

-0.92

MutationAssessor

Benign

1.7

.;L

PrimateAI

Benign

0.36

PROVEAN

Benign

-1.2

.;N

REVEL

Benign

0.052

Sift

Benign

0.096

.;T

Sift4G

Benign

0.088

T;T

Polyphen

0.0040

.;B

Vest4

0.20

MutPred

0.080

.;Loss of methylation at K54 (P = 0.1056);

MVP

0.21

MPC

0.11

ClinPred

0.075

GERP RS

3.5

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.10

gMVP

0.27

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.00077

dbscSNV1_RF

Benign

0.036

SpliceAI score (max)

0.45

Details are displayed if max score is > 0.2

DS_AG_spliceai

0.45

Position offset: -3

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