chr19-4097282-G-C

Variant names:

• chr19-4097282-G-C
• rs143275018
• NM_030662.4:c.981C>G

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_030662.4(MAP2K2):​c.981C>G​(p.Asn327Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. N327N) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: MAP2K2 NM_030662.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.0240
• Publications: 0 publications found

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 Gene-Disease associations (from GenCC):

• cardiofaciocutaneous syndrome

  Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: Orphanet, ClinGen
• cardiofaciocutaneous syndrome 4

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: G2P, PanelApp Australia, Ambry Genetics, Genomics England PanelApp, Labcorp Genetics (formerly Invitae)
• neurofibromatosis-Noonan syndrome

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• Noonan syndrome

  Inheritance: AD Classification: LIMITED Submitted by: ClinGen

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MAP2K2	NM_030662.4	c.981C>G	p.Asn327Lys	missense_variant	Exon 8 of 11	ENST00000262948.10	NP_109587.1
MAP2K2	NM_001440689.1	c.411C>G	p.Asn137Lys	missense_variant	Exon 6 of 9		NP_001427618.1
MAP2K2	NM_001440688.1	c.706-1833C>G		intron_variant	Intron 6 of 8		NP_001427617.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MAP2K2	ENST00000262948.10	c.981C>G	p.Asn327Lys	missense_variant	Exon 8 of 11	1	NM_030662.4	ENSP00000262948.4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.90
BayesDel_addAF	Benign	-0.011	T
BayesDel_noAF	Benign	-0.25
CADD	Benign	12
DANN	Benign	0.94
DEOGEN2	Benign	0.38	T;T
Eigen	Benign	-1.1
Eigen_PC	Benign	-1.2
FATHMM_MKL	Benign	0.74	D
LIST_S2	Benign	0.74	T;T
M_CAP	Pathogenic	0.57	D
MetaRNN	Uncertain	0.63	D;D
MetaSVM	Benign	-0.70	T
MutationAssessor	Benign	1.1	L;.
PhyloP100		-0.024
PrimateAI	Uncertain	0.73	T
PROVEAN	Pathogenic	-5.0	D;D
REVEL	Uncertain	0.33
Sift	Uncertain	0.021	D;D
Sift4G	Benign	0.063	T;T
Polyphen		0.0080	B;.
Vest4		0.62
MutPred		0.47		Gain of methylation at N327 (P = 0.0078);.;
MVP		0.71
MPC		0.57
ClinPred		0.84	D
GERP RS		-5.5
Varity_R		0.91
gMVP		0.75
Mutation Taster		=5/95	disease causing

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

Other links and lift over

dbSNP: rs143275018; hg19: chr19-4097280;