rs78455795

Variant names:

Variant summary

Our verdict is Benign. The variant received -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBS1BS2

The NM_139075.4(TPCN2):c.250C>T(p.Arg84Trp) variant causes a missense, splice region change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000794 in 1,613,920 control chromosomes in the GnomAD database, including 14 homozygotes. In-silico tool predicts a benign outcome for this variant. 16/23 in silico tools predict a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Benign (★★).

Frequency

Genomes: 𝑓 0.0012 ( 3 hom., cov: 33)

Exomes 𝑓: 0.00075 ( 11 hom. )

Consequence

TPCN2
NM_139075.4 missense, splice_region

Scores

Splicing: ADA: 0.001273

Clinical Significance

Benign criteria provided, multiple submitters, no conflicts B:2

Conservation

PhyloP100: 0.909

Publications

4 publications found

Variant links:

Genes affected

TPCN2 (HGNC:20820): (two pore segment channel 2) This gene encodes a putative cation-selective ion channel with two repeats of a six-transmembrane-domain. The protein localizes to lysosomal membranes and enables nicotinic acid adenine dinucleotide phosphate (NAADP) -induced calcium ion release from lysosome-related stores. This ubiquitously expressed gene has elevated expression in liver and kidney. Two common nonsynonymous SNPs in this gene strongly associate with blond versus brown hair pigmentation.[provided by RefSeq, Dec 2009]

TPCN2 Gene-Disease associations (from GenCC):

albinism
Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics

TPCN2 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -20 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.004129082).

BP6

Variant 11-69054796-C-T is Benign according to our data. Variant chr11-69054796-C-T is described in ClinVar as [Benign]. Clinvar id is 708141.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population eas. GnomAd4 allele frequency = 0.0012 (183/152334) while in subpopulation EAS AF = 0.0295 (153/5188). AF 95% confidence interval is 0.0257. There are 3 homozygotes in GnomAd4. There are 110 alleles in the male GnomAd4 subpopulation. Median coverage is 33. This position passed quality control check.

BS2

High AC in GnomAd4 at 183 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TPCN2	NM_139075.4 link	c.250C>T	p.Arg84Trp	missense_variant, splice_region_variant	Exon 3 of 25	ENST00000294309.8	NP_620714.2	Q8NHX9Q59G56

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TPCN2	ENST00000294309.8 link	c.250C>T	p.Arg84Trp	missense_variant, splice_region_variant	Exon 3 of 25	1	NM_139075.4	ENSP00000294309.3		Q8NHX9

Frequencies

GnomAD3 genomes

AF:

0.00120

AC:

183

AN:

152216

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000289

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000131

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.0294

Gnomad SAS

AF:

0.00165

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000735

Gnomad OTH

AF:

0.00143

GnomAD2 exomes

AF:

0.00217

AC:

544

AN:

250864

AF XY:

0.00200

show subpopulations

Gnomad AFR exome

AF:

0.0000618

Gnomad AMR exome

AF:

0.0000580

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0281

Gnomad FIN exome

AF:

0.0000926

Gnomad NFE exome

AF:

0.0000705

Gnomad OTH exome

AF:

0.000327

GnomAD4 exome

AF:

0.000752

AC:

1099

AN:

1461586

Hom.:

Cov.:

AF XY:

0.000703

AC XY:

511

AN XY:

727036

show subpopulations

African (AFR)

AF:

0.000119

AC:

AN:

33480

American (AMR)

AF:

0.0000447

AC:

AN:

44702

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26124

East Asian (EAS)

AF:

0.0234

AC:

927

AN:

39690

South Asian (SAS)

AF:

0.000569

AC:

AN:

86166

European-Finnish (FIN)

AF:

0.0000375

AC:

AN:

53402

Middle Eastern (MID)

AF:

0.00104

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.0000504

AC:

AN:

1111862

Other (OTH)

AF:

0.000878

AC:

AN:

60392

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.473

Heterozygous variant carriers

107

161

214

268

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.00120

AC:

183

AN:

152334

Hom.:

Cov.:

AF XY:

0.00148

AC XY:

110

AN XY:

74494

show subpopulations

African (AFR)

AF:

0.000289

AC:

AN:

41576

American (AMR)

AF:

0.000131

AC:

AN:

15300

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.0295

AC:

153

AN:

5188

South Asian (SAS)

AF:

0.00166

AC:

AN:

4832

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10622

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0000735

AC:

AN:

68022

Other (OTH)

AF:

0.00142

AC:

AN:

2116

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.512

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.00121

Hom.:

Bravo

AF:

0.00145

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000233

AC:

ExAC

AF:

0.00213

AC:

258

Asia WGS

AF:

0.00808

AC:

AN:

3478

EpiCase

AF:

0.0000545

EpiControl

AF:

0.0000593

ClinVar

Significance: Benign

Submissions summary: Benign:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:2

May 14, 2018

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Breakthrough Genomics, Breakthrough Genomics

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:not provided

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.076

BayesDel_addAF

Benign

-0.26

BayesDel_noAF

Benign

-0.12

CADD

Benign

(source)

DANN

Benign

0.91

DEOGEN2

Benign

0.097

T;T;T;T

Eigen

Benign

-0.94

Eigen_PC

Benign

-0.77

FATHMM_MKL

Benign

0.31

LIST_S2

Uncertain

0.90

D;.;D;D

MetaRNN

Benign

0.0041

T;T;T;T

MetaSVM

Benign

-0.29

MutationAssessor

Benign

-0.18

N;.;.;.

PhyloP100

0.91

PrimateAI

Benign

0.24

PROVEAN

Benign

0.96

N;.;N;.

REVEL

Uncertain

0.33

Sift

Benign

0.20

T;.;T;.

Sift4G

Benign

0.18

T;.;T;.

Polyphen

0.0020

B;.;B;.

Vest4

0.34

MVP

0.65

MPC

0.20

ClinPred

0.036

GERP RS

-0.12

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

2.7

Varity_R

0.043

gMVP

0.51

Mutation Taster

=98/2

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.0013

dbscSNV1_RF

Benign

0.052

SpliceAI score (max)

0.010

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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rs78455795

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