19-4090608-G-C

Variant names:

• chr19-4090608-G-C
• rs758299115
• NM_030662.4:c.1193C>G

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_030662.4(MAP2K2):​c.1193C>G​(p.Thr398Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 17/22 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. T398P) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 33)
• Consequence: MAP2K2 NM_030662.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.45

Genes affected

MAP2K2 (HGNC:6842): (mitogen-activated protein kinase kinase 2) The protein encoded by this gene is a dual specificity protein kinase that belongs to the MAP kinase kinase family. This kinase is known to play a critical role in mitogen growth factor signal transduction. It phosphorylates and thus activates MAPK1/ERK2 and MAPK2/ERK3. The activation of this kinase itself is dependent on the Ser/Thr phosphorylation by MAP kinase kinase kinases. Mutations in this gene cause cardiofaciocutaneous syndrome (CFC syndrome), a disease characterized by heart defects, cognitive disability, and distinctive facial features similar to those found in Noonan syndrome. The inhibition or degradation of this kinase is also found to be involved in the pathogenesis of Yersinia and anthrax. A pseudogene, which is located on chromosome 7, has been identified for this gene. [provided by RefSeq, Jul 2008]

ACMG classification

Our verdict: Likely_benign. The variant received -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.02229333).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MAP2K2	NM_030662.4	c.1193C>G	p.Thr398Ser	missense_variant	Exon 11 of 11	ENST00000262948.10	NP_109587.1
MAP2K2	NM_001440688.1	c.914C>G	p.Thr305Ser	missense_variant	Exon 9 of 9
MAP2K2	NM_001440689.1	c.623C>G	p.Thr208Ser	missense_variant	Exon 9 of 9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MAP2K2	ENST00000262948.10	c.1193C>G	p.Thr398Ser	missense_variant	Exon 11 of 11	1	NM_030662.4	ENSP00000262948.4

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD2 exomes AF: 0.00000637 AC: 1 AN: 157076 AF XY: 0.0000120

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000402

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 33

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

RASopathy Uncertain:1

Jan 19, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces threonine, which is neutral and polar, with serine, which is neutral and polar, at codon 398 of the MAP2K2 protein (p.Thr398Ser). This variant is present in population databases (no rsID available, gnomAD 0.004%). This variant has not been reported in the literature in individuals affected with MAP2K2-related conditions. 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 MAP2K2 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	0.072
BayesDel_addAF	Benign	-0.22	T
BayesDel_noAF	Benign	-0.43
CADD	Benign	8.3
DANN	Benign	0.59
DEOGEN2	Benign	0.25	T;T
Eigen	Benign	-1.3
Eigen_PC	Benign	-1.3
FATHMM_MKL	Benign	0.18	N
LIST_S2	Benign	0.49	T;T
M_CAP	Benign	0.053	D
MetaRNN	Benign	0.022	T;T
MetaSVM	Benign	-0.99	T
MutationAssessor	Benign	0.83	L;.
PhyloP100		1.4
PrimateAI	Benign	0.37	T
PROVEAN	Benign	-0.48	N;N
REVEL	Benign	0.086
Sift	Benign	0.66	T;T
Sift4G	Benign	0.27	T;T
Polyphen		0.0010	B;.
Vest4		0.022
MutPred		0.11		Loss of phosphorylation at T398 (P = 0.0744);.;
MVP		0.51
MPC		0.39
ClinPred		0.013	T
GERP RS		1.2
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.035
gMVP		0.28
Mutation Taster		=94/6	polymorphism

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

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Other links and lift over

dbSNP: rs758299115; hg19: chr19-4090606;