NM_002755.4:c.803C>G

Variant names:

• chr15-66485099-C-G
• rs757459909
• NM_002755.4:c.803C>G

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 4P and 2B. PM1 PM2 BP4_Moderate

The NM_002755.4(MAP2K1):​c.803C>G​(p.Ala268Gly) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A268V) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: MAP2K1 NM_002755.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 7.81
• Publications: 0 publications found

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 Gene-Disease associations (from GenCC):

• cardiofaciocutaneous syndrome

  Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: Orphanet, ClinGen
• cardiofaciocutaneous syndrome 3

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

  Inheritance: AD Classification: STRONG, LIMITED Submitted by: Genomics England PanelApp, ClinGen
• Noonan syndrome

  Inheritance: AD Classification: LIMITED Submitted by: ClinGen
• Costello syndrome

  Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen

ACMG classification

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

• PM1: In a domain Protein kinase (size 293) in uniprot entity MP2K1_HUMAN there are 34 pathogenic changes around while only 3 benign (92%) in NM_002755.4
• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.23420244).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MAP2K1	NM_002755.4	c.803C>G	p.Ala268Gly	missense_variant	Exon 7 of 11	ENST00000307102.10	NP_002746.1
MAP2K1	NM_001411065.1	c.659C>G	p.Ala220Gly	missense_variant	Exon 6 of 10		NP_001397994.1
MAP2K1	XM_011521783.4	c.737C>G	p.Ala246Gly	missense_variant	Exon 7 of 11		XP_011520085.1
MAP2K1	XM_017022411.3	c.725C>G	p.Ala242Gly	missense_variant	Exon 6 of 10		XP_016877900.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MAP2K1	ENST00000307102.10	c.803C>G	p.Ala268Gly	missense_variant	Exon 7 of 11	1	NM_002755.4	ENSP00000302486.5

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	Benign	0.084
BayesDel_addAF	Benign	-0.10	T
BayesDel_noAF	Benign	-0.39
CADD	Uncertain	24
DANN	Uncertain	0.99
DEOGEN2	Benign	0.29	T;T
Eigen	Uncertain	0.19
Eigen_PC	Uncertain	0.30
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.86	D;D
M_CAP	Benign	0.015	T
MetaRNN	Benign	0.23	T;T
MetaSVM	Benign	-0.95	T
MutationAssessor	Benign	1.0	L;.
PhyloP100		7.8
PrimateAI	Uncertain	0.57	T
PROVEAN	Benign	-1.6	N;N
REVEL	Benign	0.091
Sift	Benign	0.12	T;T
Sift4G	Benign	0.28	T;T
Polyphen		0.0050	B;.
Vest4		0.19
MutPred		0.45		Gain of disorder (P = 0.1149);.;
MVP		0.55
MPC		1.3
ClinPred		0.83	D
GERP RS		4.5
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.40
gMVP		0.37
Mutation Taster		=51/49	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

Other links and lift over

dbSNP: rs757459909; hg19: chr15-66777437;