3-184372602-G-A

Position:

chr3-184372602-G-A

Variant summary

Our verdict is Likely benign. Variant got -3 ACMG points: 0P and 3B. BP4_ModerateBS1_Supporting

The NM_000460.4(THPO):c.973C>T(p.Pro325Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000898 in 1,613,976 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 0.00018 ( 0 hom., cov: 31)

Exomes 𝑓: 0.000080 ( 0 hom. )

Consequence

THPO
NM_000460.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2

Conservation

PhyloP100: 1.01

Variant links:

Genes affected

THPO (HGNC:11795): (thrombopoietin) Megakaryocytopoiesis is the cellular development process that leads to platelet production. The main functional protein encoded by this gene is a humoral growth factor that is necessary for megakaryocyte proliferation and maturation, as well as for thrombopoiesis. This protein is the ligand for MLP/C_MPL, the product of myeloproliferative leukemia virus oncogene. Mutations in this gene are the cause of thrombocythemia 1. Alternative promoter usage and differential splicing result in multiple transcript variants differing in the 5' UTR and/or coding region. Multiple AUG codons upstream of the main open reading frame (ORF) have been identified, and these upstream AUGs inhibit translation of the main ORF at different extent. [provided by RefSeq, Feb 2014]

THPO links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -3 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.13210064).

BS1

Variant frequency is greater than expected in population amr. gnomad4 allele frequency = 0.000184 (28/152220) while in subpopulation AMR AF= 0.000981 (15/15290). AF 95% confidence interval is 0.000604. There are 0 homozygotes in gnomad4. There are 18 alleles in male gnomad4 subpopulation. Median coverage is 31. This position pass quality control queck. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
THPO	NM_000460.4 linkuse as main transcript	c.973C>T	p.Pro325Ser	missense_variant	6/6	ENST00000647395.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
THPO	ENST00000647395.1 linkuse as main transcript	c.973C>T	p.Pro325Ser	missense_variant	6/6		NM_000460.4	P2	P40225-1

Frequencies

GnomAD3 genomes

AF:

0.000184

AC:

AN:

152102

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000724

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000982

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00316

Gnomad NFE

AF:

0.000118

Gnomad OTH

AF:

0.000479

GnomAD3 exomes

AF:

0.0000638

AC:

AN:

250966

Hom.:

AF XY:

0.0000516

AC XY:

AN XY:

135598

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000174

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:

0.0000882

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000800

AC:

117

AN:

1461756

Hom.:

Cov.:

AF XY:

0.0000839

AC XY:

AN XY:

727168

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.000201

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.0000187

Gnomad4 NFE exome

AF:

0.0000872

Gnomad4 OTH exome

AF:

0.000132

GnomAD4 genome

AF:

0.000184

AC:

AN:

152220

Hom.:

Cov.:

AF XY:

0.000242

AC XY:

AN XY:

74442

show subpopulations

Gnomad4 AFR

AF:

0.0000722

Gnomad4 AMR

AF:

0.000981

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000118

Gnomad4 OTH

AF:

0.000474

Alfa

AF:

0.0000894

Hom.:

Bravo

AF:

0.000162

TwinsUK

AF:

0.00

AC:

ALSPAC

AF:

0.000519

AC:

ExAC

AF:

0.0000330

AC:

EpiCase

AF:

0.000218

EpiControl

AF:

0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Oct 04, 2023	This sequence change replaces proline, which is neutral and non-polar, with serine, which is neutral and polar, at codon 325 of the THPO protein (p.Pro325Ser). This variant is present in population databases (rs62287511, gnomAD 0.02%). This variant has not been reported in the literature in individuals affected with THPO-related conditions. ClinVar contains an entry for this variant (Variation ID: 2135109). An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant is likely to be disruptive. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -
Uncertain significance, criteria provided, single submitter	clinical testing	GeneDx	Nov 17, 2022	In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; Has not been previously published as pathogenic or benign to our knowledge -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.11

BayesDel_addAF

Benign

-0.35

BayesDel_noAF

Benign

-0.47

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.50

D;D;.;.;.

Eigen

Benign

-0.066

Eigen_PC

Benign

-0.14

FATHMM_MKL

Benign

0.31

LIST_S2

Benign

0.57

.;T;.;T;T

M_CAP

Benign

0.028

MetaRNN

Benign

0.13

T;T;T;T;T

MetaSVM

Benign

-1.1

MutationAssessor

Uncertain

2.4

M;M;.;.;.

MutationTaster

Benign

1.0

N;N;N;N

PrimateAI

Benign

0.30

PROVEAN

Uncertain

-3.0

D;.;.;D;.

REVEL

Benign

0.028

Sift

Uncertain

0.011

D;.;.;D;.

Sift4G

Pathogenic

0.0

D;.;.;D;.

Polyphen

0.44

B;B;.;P;.

Vest4

0.28

MutPred

0.12

Gain of glycosylation at P325 (P = 0.0506);Gain of glycosylation at P325 (P = 0.0506);.;.;.;

MVP

0.74

MPC

0.54

ClinPred

0.25

GERP RS

2.3

Varity_R

0.083

gMVP

0.36

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