rs747807884

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 3P and 2B. PM1PP2BP4_Moderate

The NM_002755.4(MAP2K1):c.871A>G(p.Arg291Gly) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000744 in 1,613,820 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R291K) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000068 ( 0 hom. )

Consequence

MAP2K1
NM_002755.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:4

Conservation

PhyloP100: 1.15

Variant links:

Genes affected

MAP2K1 (HGNC:6840): (mitogen-activated protein kinase kinase 1) The protein encoded by this gene is a member of the dual specificity protein kinase family, which acts as a mitogen-activated protein (MAP) kinase kinase. MAP kinases, also known as extracellular signal-regulated kinases (ERKs), act as an integration point for multiple biochemical signals. This protein kinase lies upstream of MAP kinases and stimulates the enzymatic activity of MAP kinases upon wide variety of extra- and intracellular signals. As an essential component of MAP kinase signal transduction pathway, this kinase is involved in many cellular processes such as proliferation, differentiation, transcription regulation and development. [provided by RefSeq, Jul 2008]

MAP2K1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 1 ACMG points.

PM1

In a domain Protein kinase (size 293) in uniprot entity MP2K1_HUMAN there are 48 pathogenic changes around while only 5 benign (91%) in NM_002755.4

PP2

Missense variant where missense usually causes diseases, MAP2K1

BP4

Computational evidence support a benign effect (MetaRNN=0.16128117).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
MAP2K1	NM_002755.4 linkuse as main transcript	c.871A>G	p.Arg291Gly	missense_variant	7/11	ENST00000307102.10
MAP2K1	NM_001411065.1 linkuse as main transcript	c.727A>G	p.Arg243Gly	missense_variant	6/10
MAP2K1	XM_011521783.4 linkuse as main transcript	c.805A>G	p.Arg269Gly	missense_variant	7/11
MAP2K1	XM_017022411.3 linkuse as main transcript	c.793A>G	p.Arg265Gly	missense_variant	6/10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
MAP2K1	ENST00000307102.10 linkuse as main transcript	c.871A>G	p.Arg291Gly	missense_variant	7/11	1	NM_002755.4	P1	Q02750-1

Frequencies

GnomAD3 genomes

AF:

0.0000131

AC:

AN:

152164

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000654

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:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000159

AC:

AN:

251136

Hom.:

AF XY:

0.0000147

AC XY:

AN XY:

135816

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000289

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:

0.0000264

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000684

AC:

AN:

1461656

Hom.:

Cov.:

AF XY:

0.00000825

AC XY:

AN XY:

727116

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000224

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:

0.00000719

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

AF:

0.0000131

AC:

AN:

152164

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74330

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.0000654

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000113

ExAC

AF:

0.0000247

AC:

EpiCase

AF:

0.00

EpiControl

AF:

0.0000593

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:4

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	Women's Health and Genetics/Laboratory Corporation of America, LabCorp	Nov 21, 2019	Variant Summary: MAP2K1 c.871A>G (p.Arg291Gly) results in a non-conservative amino acid change located in the Protein kinase domain (IPR000719) of the encoded protein sequence. Three of five in-silico tools predict a benign effect of the variant on protein function. The variant allele was found at a frequency of 1.6e-05 in 251136 control chromosomes (gnomAD). The available data on variant occurrences in the general population are insufficient to allow any conclusion about variant significance. c.871A>G has been reported as an unpublished case report in a proband and his father, both affected with dilated cardiomyopathy (Whitaker_2015). The variant was reported along with a TTN truncation variant in both patients but it was also reported in unaffected family members and a sibling with evidence of left ventricular diastolic dysfunction while, it was absent from another sibling who exhibited the presence of early left ventricle noncompaction and was positive for the TTN variant. This report does not provide unequivocal conclusions about association of the variant with Noonan Syndrome and Related Conditions. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. Two ClinVar submitters (evaluation after 2014) cite the variant as uncertain significance. Based on the evidence outlined above, the variant was classified as uncertain significance. -
Uncertain significance, criteria provided, single submitter	clinical testing	GeneDx	Mar 13, 2015	The R291G variant has not been published as a pathogenic variant nor has it been reported as a benign polymorphism to our knowledge. The R291G variant was not observed in approximately 6,500 individuals of European and African American ancestry in the NHLBI Exome Sequencing Project, indicating it is not a common benign variant in these populations. The R291G variant is a non-conservative amino acid substitution, which is likely to impact secondary protein structure as these residues differ in polarity, charge, size and/or other properties. This substitution occurs at a position that is conserved across mammals. However, in silico analysis is inconsistent in its predictions as to whether or not the variant is damaging to the protein structure/function. Furthermore, no missense variants in nearby residues have been reported in the Human Gene Mutation Database (Stenson et al., 2014), indicating that this region of the protein may be tolerant of change.Therefore, based on the currently available information, it is unclear whether this variant is a pathogenic variant or a rare benign variant -

Cardiovascular phenotype

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

May 27, 2023

The p.R291G variant (also known as c.871A>G), located in coding exon 7 of the MAP2K1 gene, results from an A to G substitution at nucleotide position 871. The arginine at codon 291 is replaced by glycine, an amino acid with dissimilar properties. This amino acid position is conserved. In addition, the in silico prediction for this alteration is inconclusive. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

RASopathy

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

Nov 15, 2023

This sequence change replaces arginine, which is basic and polar, with glycine, which is neutral and non-polar, at codon 291 of the MAP2K1 protein (p.Arg291Gly). This variant is present in population databases (rs747807884, gnomAD 0.003%). This variant has not been reported in the literature in individuals affected with MAP2K1-related conditions. ClinVar contains an entry for this variant (Variation ID: 372605). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt MAP2K1 protein function with a negative predictive value of 95%. 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. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.28

BayesDel_addAF

Benign

-0.0046

BayesDel_noAF

Benign

-0.16

Cadd

Benign

Dann

Uncertain

0.98

DEOGEN2

Benign

0.41

T;T

Eigen

Benign

-0.59

Eigen_PC

Benign

-0.53

FATHMM_MKL

Benign

0.46

LIST_S2

Benign

0.74

T;T

M_CAP

Benign

0.032

MetaRNN

Benign

0.16

T;T

MetaSVM

Benign

-0.84

MutationAssessor

Benign

1.4

L;.

MutationTaster

Benign

1.0

D;D

PrimateAI

Uncertain

0.71

PROVEAN

Benign

-1.6

N;N

REVEL

Uncertain

0.31

Sift

Benign

0.084

T;T

Sift4G

Benign

0.19

T;T

Polyphen

0.0010

B;.

Vest4

0.40

MVP

0.86

MPC

1.6

ClinPred

0.060

GERP RS

1.5

Varity_R

0.26

gMVP

0.57

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