Genetic Variant NM_003595.5:c.898A>C (chr22-26536431-T-G) – ACMG Classification: Uncertain_significance (3 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 4P and 1B. PM1PM2BP4

The NM_003595.5(TPST2):c.898A>C(p.Lys300Gln) variant causes a missense change. The variant allele was found at a frequency of 0.00021 in 1,567,150 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00012 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00022 ( 0 hom. )

Consequence

TPST2
NM_003595.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 5.60

Variant links:

Genes affected

TPST2 (HGNC:12021): (tyrosylprotein sulfotransferase 2) The protein encoded by this gene catalyzes the O-sulfation of tyrosine residues within acidic regions of proteins. The encoded protein is a type II integral membrane protein found in the Golgi body. Alternative splicing produces multiple transcript variants encoding distinct isoforms. [provided by RefSeq, May 2018]

TPST2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 3 ACMG points.

PM1

In a binding_site (size 0) in uniprot entity TPST2_HUMAN

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.40099874).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TPST2	NM_003595.5 link	c.898A>C	p.Lys300Gln	missense_variant	Exon 4 of 7	ENST00000338754.9	NP_003586.3	O60704A0A024R1G9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TPST2	ENST00000338754.9 link	c.898A>C	p.Lys300Gln	missense_variant	Exon 4 of 7	1	NM_003595.5	ENSP00000339813.4		O60704

Frequencies

GnomAD3 genomes

AF:

0.000118

AC:

AN:

152162

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:

0.000265

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000107

AC:

AN:

214666

Hom.:

AF XY:

0.0000872

AC XY:

AN XY:

114718

show subpopulations

Gnomad AFR exome

AF:

0.0000631

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000221

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000220

AC:

311

AN:

1414988

Hom.:

Cov.:

AF XY:

0.000198

AC XY:

138

AN XY:

698250

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:

0.000270

Gnomad4 OTH exome

AF:

0.000292

GnomAD4 genome

AF:

0.000118

AC:

AN:

152162

Hom.:

Cov.:

AF XY:

0.000108

AC XY:

AN XY:

74338

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:

0.000265

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000173

Hom.:

Bravo

AF:

0.000136

TwinsUK

AF:

0.000270

AC:

ALSPAC

AF:

0.000259

AC:

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000233

AC:

ExAC

AF:

0.0000907

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Jan 02, 2025

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.898A>C (p.K300Q) alteration is located in exon 4 (coding exon 2) of the TPST2 gene. This alteration results from a A to C substitution at nucleotide position 898, causing the lysine (K) at amino acid position 300 to be replaced by a glutamine (Q). 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

0.28

BayesDel_addAF

Benign

-0.24

BayesDel_noAF

Benign

-0.29

CADD

Pathogenic

DANN

Uncertain

0.99

DEOGEN2

Uncertain

0.58

D;D;D;.

Eigen

Uncertain

0.46

Eigen_PC

Uncertain

0.41

FATHMM_MKL

Uncertain

0.89

LIST_S2

Pathogenic

0.97

.;.;D;D

M_CAP

Benign

0.025

MetaRNN

Benign

0.40

T;T;T;T

MetaSVM

Benign

-0.81

MutationAssessor

Pathogenic

3.1

M;M;M;.

PrimateAI

Uncertain

0.63

PROVEAN

Uncertain

-3.4

D;D;D;D

REVEL

Benign

0.19

Sift

Uncertain

0.0090

D;D;D;D

Sift4G

Uncertain

0.020

D;D;D;D

Polyphen

0.99

D;D;D;.

Vest4

0.72

MVP

0.47

MPC

0.77

ClinPred

0.27

GERP RS

3.9

Varity_R

0.60

gMVP

0.64

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

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