rs149265851

Positions:

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBS1BS2

The NM_005373.3(MPL):c.962G>A(p.Arg321Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000501 in 1,614,148 control chromosomes in the GnomAD database, including 16 homozygotes. In-silico tool predicts a benign outcome for this variant. 15/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R321W) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.0010 ( 3 hom., cov: 32)

Exomes 𝑓: 0.00045 ( 13 hom. )

Consequence

MPL
NM_005373.3 missense

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:8O:1

Conservation

PhyloP100: -0.363

Variant links:

Genes affected

MPL (HGNC:7217): (MPL proto-oncogene, thrombopoietin receptor) In 1990 an oncogene, v-mpl, was identified from the murine myeloproliferative leukemia virus that was capable of immortalizing bone marrow hematopoietic cells from different lineages. In 1992 the human homologue, named, c-mpl, was cloned. Sequence data revealed that c-mpl encoded a protein that was homologous with members of the hematopoietic receptor superfamily. Presence of anti-sense oligodeoxynucleotides of c-mpl inhibited megakaryocyte colony formation. The ligand for c-mpl, thrombopoietin, was cloned in 1994. Thrombopoietin was shown to be the major regulator of megakaryocytopoiesis and platelet formation. The protein encoded by the c-mpl gene, CD110, is a 635 amino acid transmembrane domain, with two extracellular cytokine receptor domains and two intracellular cytokine receptor box motifs . TPO-R deficient mice were severely thrombocytopenic, emphasizing the important role of CD110 and thrombopoietin in megakaryocyte and platelet formation. Upon binding of thrombopoietin CD110 is dimerized and the JAK family of non-receptor tyrosine kinases, as well as the STAT family, the MAPK family, the adaptor protein Shc and the receptors themselves become tyrosine phosphorylated. [provided by RefSeq, Jul 2008]

MPL links:

MPL (HGNC:):

MPL links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -20 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.0038923025).

BP6

Variant 1-43340495-G-A is Benign according to our data. Variant chr1-43340495-G-A is described in ClinVar as [Likely_benign]. Clinvar id is 134835.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 = 0.000998 (152/152262) while in subpopulation EAS AF= 0.028 (145/5176). AF 95% confidence interval is 0.0243. There are 3 homozygotes in gnomad4. There are 79 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.

BS2

High Homozygotes in GnomAd4 at 3 AD,AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
MPL	NM_005373.3 linkuse as main transcript	c.962G>A	p.Arg321Gln	missense_variant	6/12	ENST00000372470.9	NP_005364.1	P40238-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	UniProt
MPL	ENST00000372470.9 linkuse as main transcript	c.962G>A	p.Arg321Gln	missense_variant	6/12	1	NM_005373.3	ENSP00000361548.3	P40238-1
MPL	ENST00000413998.7 linkuse as main transcript	c.941G>A	p.Arg314Gln	missense_variant	6/12	1		ENSP00000414004.3	Q5JUY5
MPL	ENST00000638732.1 linkuse as main transcript	n.962G>A		non_coding_transcript_exon_variant	6/10	1

Frequencies

GnomAD3 genomes

AF:

0.00101

AC:

153

AN:

152144

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000483

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000131

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.0281

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.000478

GnomAD3 exomes

AF:

0.00229

AC:

576

AN:

251482

Hom.:

AF XY:

0.00205

AC XY:

279

AN XY:

135918

show subpopulations

Gnomad AFR exome

AF:

0.000185

Gnomad AMR exome

AF:

0.0000289

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0305

Gnomad SAS exome

AF:

0.000131

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000879

Gnomad OTH exome

AF:

0.000977

GnomAD4 exome

AF:

0.000449

AC:

656

AN:

1461886

Hom.:

Cov.:

AF XY:

0.000408

AC XY:

297

AN XY:

727242

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.0000447

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0138

Gnomad4 SAS exome

AF:

0.0000464

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000899

Gnomad4 OTH exome

AF:

0.00152

GnomAD4 genome

AF:

0.000998

AC:

152

AN:

152262

Hom.:

Cov.:

AF XY:

0.00106

AC XY:

AN XY:

74446

show subpopulations

Gnomad4 AFR

AF:

0.0000481

Gnomad4 AMR

AF:

0.000131

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.0280

Gnomad4 SAS

AF:

0.000208

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.000473

Alfa

AF:

0.000622

Hom.:

Bravo

AF:

0.000831

ESP6500AA

AF:

0.000227

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.00201

AC:

244

Asia WGS

AF:

0.00462

AC:

AN:

3478

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:8Other:1

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:2Other:1

not provided, no classification provided	reference population	ITMI	Sep 19, 2013	- -
Benign, criteria provided, single submitter	clinical testing	PreventionGenetics, part of Exact Sciences	-	- -
Benign, criteria provided, single submitter	clinical testing	Genetic Services Laboratory, University of Chicago	Sep 28, 2017	- -

not provided

Benign:2

Benign, criteria provided, single submitter	clinical testing	GeneDx	Mar 03, 2015	- -
Likely benign, criteria provided, single submitter	not provided	Breakthrough Genomics, Breakthrough Genomics	-	- -

Congenital amegakaryocytic thrombocytopenia

Benign:2

Likely benign, criteria provided, single submitter	clinical testing	Counsyl	Mar 06, 2017	- -
Likely benign, criteria provided, single submitter	clinical testing	Illumina Laboratory Services, Illumina	Jun 14, 2016	- -

Thrombocythemia 1

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jun 14, 2016

- -

Essential thrombocythemia;C1327915:Congenital amegakaryocytic thrombocytopenia

Benign:1

Benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 31, 2024

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.079

BayesDel_addAF

Benign

-0.49

BayesDel_noAF

Benign

-0.46

CADD

Benign

DANN

Benign

0.82

DEOGEN2

Benign

0.22

T;.

Eigen

Benign

-0.95

Eigen_PC

Benign

-0.94

FATHMM_MKL

Benign

0.043

LIST_S2

Benign

0.72

T;T

MetaRNN

Benign

0.0039

T;T

MetaSVM

Benign

-0.90

MutationAssessor

Benign

0.59

N;.

PrimateAI

Benign

0.19

PROVEAN

Benign

-0.53

N;.

REVEL

Benign

0.19

Sift

Benign

0.13

T;.

Sift4G

Benign

0.13

T;.

Polyphen

0.0060

B;.

Vest4

0.15

MVP

0.48

MPC

0.22

ClinPred

0.0092

GERP RS

0.33

Varity_R

0.040

gMVP

0.23

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