chr16-1241321-G-A

Position:

chr16-1241321-G-A

Variant summary

Our verdict is Likely benign. Variant got -6 ACMG points: 0P and 6B. BP4_ModerateBS2

The ENST00000338844.8(TPSAB1):c.230G>A(p.Gly77Glu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000394 in 152,380 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000039 ( 0 hom., cov: 37)

Exomes 𝑓: 0.000065 ( 0 hom. )

Failed GnomAD Quality Control

Consequence

TPSAB1
ENST00000338844.8 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -0.265

Variant links:

Genes affected

TPSAB1 (HGNC:12019): (tryptase alpha/beta 1) Tryptases comprise a family of trypsin-like serine proteases, the peptidase family S1. Tryptases are enzymatically active only as heparin-stabilized tetramers, and they are resistant to all known endogenous proteinase inhibitors. Several tryptase genes are clustered on chromosome 16p13.3. These genes are characterized by several distinct features. They have a highly conserved 3' UTR and contain tandem repeat sequences at the 5' flank and 3' UTR which are thought to play a role in regulation of the mRNA stability. These genes have an intron immediately upstream of the initiator Met codon, which separates the site of transcription initiation from protein coding sequence. This feature is characteristic of tryptases but is unusual in other genes. The alleles of this gene exhibit an unusual amount of sequence variation, such that the alleles were once thought to represent two separate genes, alpha and beta 1. Beta tryptases appear to be the main isoenzymes expressed in mast cells; whereas in basophils, alpha tryptases predominate. Tryptases have been implicated as mediators in the pathogenesis of asthma and other allergic and inflammatory disorders. [provided by RefSeq, Jul 2008]

TPSAB1 links:

TPSAB1 (HGNC:):

TPSAB1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -6 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.16142178).

BS2

High AC in GnomAd4 at 6 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
TPSAB1	NM_003294.4 linkuse as main transcript	c.230G>A	p.Gly77Glu	missense_variant	3/6	ENST00000338844.8	NP_003285.2	Q15661-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
TPSAB1	ENST00000338844.8 linkuse as main transcript	c.230G>A	p.Gly77Glu	missense_variant	3/6	1	NM_003294.4	ENSP00000343577.3		Q15661-1

Frequencies

GnomAD3 genomes

AF:

0.0000394

AC:

AN:

152262

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:

0.0000882

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000281

AC:

AN:

248818

Hom.:

AF XY:

0.0000371

AC XY:

AN XY:

134672

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000545

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000535

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

Data not reliable, filtered out with message: AS_VQSR

AF:

0.0000651

AC:

AN:

1459064

Hom.:

Cov.:

168

AF XY:

0.0000634

AC XY:

AN XY:

725676

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.0000224

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000252

Gnomad4 SAS exome

AF:

0.0000116

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000756

Gnomad4 OTH exome

AF:

0.0000996

GnomAD4 genome

AF:

0.0000394

AC:

AN:

152380

Hom.:

Cov.:

AF XY:

0.0000403

AC XY:

AN XY:

74516

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000882

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000959

Hom.:

ExAC

AF:

0.0000494

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

Jul 06, 2021

The c.230G>A (p.G77E) alteration is located in exon 3 (coding exon 2) of the TPSAB1 gene. This alteration results from a G to A substitution at nucleotide position 230, causing the glycine (G) at amino acid position 77 to be replaced by a glutamic acid (E). 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

Pathogenic

0.58

BayesDel_addAF

Benign

-0.048

BayesDel_noAF

Benign

-0.14

CADD

Benign

DANN

Benign

0.62

DEOGEN2

Benign

0.37

T;T;T

Eigen

Benign

-0.38

Eigen_PC

Benign

-0.37

FATHMM_MKL

Benign

0.040

LIST_S2

Benign

0.062

T;T;T

M_CAP

Uncertain

0.16

MetaRNN

Benign

0.16

T;T;T

MetaSVM

Benign

-0.62

MutationAssessor

Benign

0.43

N;.;.

MutationTaster

Benign

1.0

N;N

PrimateAI

Uncertain

0.57

PROVEAN

Benign

-0.76

N;N;N

REVEL

Uncertain

0.45

Sift

Benign

0.53

T;T;T

Sift4G

Benign

0.50

T;T;T

Polyphen

0.96

D;.;.

Vest4

0.27

MutPred

0.36

Gain of disorder (P = 0.2511);.;.;

MVP

0.71

MPC

0.29

ClinPred

0.13

GERP RS

3.9

Varity_R

0.24

gMVP

0.48

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.030

Details are displayed if max score is > 0.2

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