Genetic Variant JPH2:p.Thr76Ser (chr20-44186480-T-A) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_020433.5(JPH2):c.226A>T(p.Thr76Ser) variant causes a missense change. The variant allele was found at a frequency of 0.000000684 in 1,461,870 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign 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. T76A) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 31)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

JPH2
NM_020433.5 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 5.93

Publications

0 publications found

Variant links:

Genes affected

JPH2 (HGNC:14202): (junctophilin 2) Junctional complexes between the plasma membrane and endoplasmic/sarcoplasmic reticulum are a common feature of all excitable cell types and mediate cross talk between cell surface and intracellular ion channels. The protein encoded by this gene is a component of junctional complexes and is composed of a C-terminal hydrophobic segment spanning the endoplasmic/sarcoplasmic reticulum membrane and a remaining cytoplasmic domain that shows specific affinity for the plasma membrane. This gene is a member of the junctophilin gene family. Alternative splicing has been observed at this locus and two variants encoding distinct isoforms are described. [provided by RefSeq, Jul 2008]

JPH2 Gene-Disease associations (from GenCC):

hypertrophic cardiomyopathy 17
Inheritance: AD Classification: STRONG, MODERATE Submitted by: PanelApp Australia, Labcorp Genetics (formerly Invitae)
cardiomyopathy, dilated, 2E
Inheritance: Unknown, AR Classification: STRONG, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics
hypertrophic cardiomyopathy
Inheritance: AD Classification: MODERATE Submitted by: ClinGen
dilated cardiomyopathy
Inheritance: SD Classification: MODERATE Submitted by: ClinGen

JPH2 links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.2377682).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
JPH2	NM_020433.5 link	c.226A>T	p.Thr76Ser	missense_variant	Exon 1 of 6	ENST00000372980.4	NP_065166.2	Q9BR39-1Q86VZ3
JPH2	NM_175913.4 link	c.226A>T	p.Thr76Ser	missense_variant	Exon 1 of 2		NP_787109.2	Q9BR39-2
JPH2	XM_006723833.5 link	c.226A>T	p.Thr76Ser	missense_variant	Exon 1 of 2		XP_006723896.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
JPH2	ENST00000372980.4 link	c.226A>T	p.Thr76Ser	missense_variant	Exon 1 of 6	5	NM_020433.5	ENSP00000362071.3		Q9BR39-1
JPH2	ENST00000342272.3 link	c.226A>T	p.Thr76Ser	missense_variant	Exon 1 of 2	1		ENSP00000344590.3		Q9BR39-2

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1461870

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

727238

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33480

American (AMR)

AF:

0.00

AC:

AN:

44722

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.00

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53408

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

8.99e-7

AC:

AN:

1112006

Other (OTH)

AF:

0.00

AC:

AN:

60392

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.525

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

Benign

0.10

BayesDel_addAF

Benign

-0.15

BayesDel_noAF

Benign

-0.46

CADD

Uncertain

(source)

DANN

Uncertain

0.98

DEOGEN2

Benign

0.19

T;.

Eigen

Benign

0.11

Eigen_PC

Benign

0.21

FATHMM_MKL

Uncertain

0.96

LIST_S2

Benign

0.82

T;T

M_CAP

Benign

0.023

MetaRNN

Benign

0.24

T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

0.77

N;N

PhyloP100

5.9

PrimateAI

Uncertain

0.76

PROVEAN

Benign

-1.6

N;D

REVEL

Benign

0.13

Sift

Benign

0.27

T;T

Sift4G

Benign

0.41

T;T

Polyphen

0.95

P;B

Vest4

0.47

MutPred

0.40

Gain of disorder (P = 0.0453);Gain of disorder (P = 0.0453);

MVP

0.77

ClinPred

0.93

GERP RS

4.6

Varity_R

0.23

gMVP

0.28

Mutation Taster

=68/32

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