chr15-66387376-A-T

Position:

• chr15-66387376-A-T

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2 PP2

The NM_002755.4(MAP2K1):​c.29A>T​(p.Gln10Leu) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: MAP2K1 NM_002755.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 4.52

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]

ACMG classification

Verdict is Uncertain_significance. Variant got 3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in gene, where missense usually causes diseases (based on misZ statistic), MAP2K1. . Gene score misZ 3.1085 (greater than the threshold 3.09). Trascript score misZ 3.7499 (greater than threshold 3.09). GenCC has associacion of gene with Noonan syndrome with multiple lentigines, cardiofaciocutaneous syndrome 1, Noonan syndrome, cardiofaciocutaneous syndrome, cardiofaciocutaneous syndrome 3, Costello syndrome.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
MAP2K1	NM_002755.4	c.29A>T	p.Gln10Leu	missense_variant	1/11	ENST00000307102.10	NP_002746.1
MAP2K1	XM_017022411.3	c.29A>T	p.Gln10Leu	missense_variant	1/10		XP_016877900.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
MAP2K1	ENST00000307102.10	c.29A>T	p.Gln10Leu	missense_variant	1/11	1	NM_002755.4	ENSP00000302486	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Aug 12, 2019

Variant summary: MAP2K1 c.29A>T (p.Gln10Leu) results in a non-conservative amino acid change in the encoded protein sequence. Three of five in-silico tools predict a benign effect of the variant on protein function. The variant was absent in 176886 control chromosomes (gnomAD). The available data on variant occurrences in the general population are insufficient to allow any conclusion about variant significance. To our knowledge, no occurrence of c.29A>T in individuals affected with Noonan Syndrome and Related Conditions and no experimental evidence demonstrating its impact on protein function have been reported. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014. Based on the evidence outlined above, the variant was classified as uncertain significance. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.081
BayesDel_addAF	Uncertain	0.14	D
BayesDel_noAF	Uncertain	-0.030
CADD	Benign	23
DANN	Uncertain	0.98
DEOGEN2	Uncertain	0.51	D
Eigen	Benign	-0.22
Eigen_PC	Benign	-0.056
FATHMM_MKL	Benign	0.75	D
LIST_S2	Benign	0.79	T
M_CAP	Pathogenic	0.85	D
MetaRNN	Uncertain	0.50	T
MetaSVM	Uncertain	-0.13	T
MutationAssessor	Benign	-0.20	N
MutationTaster	Benign	1.0	D
PrimateAI	Pathogenic	0.82	D
PROVEAN	Benign	-1.4	N
REVEL	Uncertain	0.41
Sift	Benign	0.25	T
Sift4G	Benign	0.33	T
Polyphen		0.0050	B
Vest4		0.53
MutPred		0.30		Gain of sheet (P = 0.0266);
MVP		0.95
MPC		1.3
ClinPred		0.80	D
GERP RS		4.1
Varity_R		0.37
gMVP		0.55

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

Other links and lift over

dbSNP: rs2093343985; hg19: chr15-66679714;