chr19-4117434-GA-AC

Position:

• chr19-4117434-GA-AC

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2 PP3

The ENST00000262948.10(MAP2K2):​c.287_288delTCinsGT​(p.Leu96Arg) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★★). Synonymous variant affecting the same amino acid position (i.e. L96L) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 33)
• Consequence: MAP2K2 ENST00000262948.10 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:2
• Conservation: PhyloP100: 9.20

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]

MAP2K2 (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: No computational evidence supports a deleterious effect, but strongly conserved according to phyloP

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
MAP2K2	NM_030662.4	c.287_288delTCinsGT	p.Leu96Arg	missense_variant		ENST00000262948.10	NP_109587.1
MAP2K2	XM_006722799.3	c.287_288delTCinsGT	p.Leu96Arg	missense_variant			XP_006722862.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
MAP2K2	ENST00000262948.10	c.287_288delTCinsGT	p.Leu96Arg	missense_variant		1	NM_030662.4	ENSP00000262948.4
MAP2K2	ENST00000394867.9	n.726_727delTCinsGT		non_coding_transcript_exon_variant	1/10	5
MAP2K2	ENST00000599345.1	n.484_485delTCinsGT		non_coding_transcript_exon_variant	2/7	5
MAP2K2	ENST00000687128.1	n.726_727delTCinsGT		non_coding_transcript_exon_variant	1/7

Frequencies

GnomAD3 genomes Cov.: 33

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Oct 16, 2012

The Leu96Arg variant in MEK2 has not been reported in the literature nor previou sly identified in our laboratory. Computational analyses (biochemical amino acid properties, conservation, AlignGVGD, PolyPhen2, and SIFT) suggest that the Leu9 6Arg variant may impact the protein, though this information is not predictive e nough to determine pathogenicity. In summary, additional information is needed to fully assess the clinical significance of the Leu96Arg variant. -

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

CeGaT Center for Human Genetics Tuebingen

Dec 01, 2023

MAP2K2: PM2, PS2:Moderate -

Computational scores

Source: dbNSFP v4.3

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Other links and lift over

dbSNP: rs397517412; hg19: chr19-4117432;