chr22-21772925-T-C

Position:

• chr22-21772925-T-C

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2 PP2 PP3

The NM_002745.5(MAPK1):​c.914A>G​(p.Glu305Gly) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000657 in 152,232 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: 𝑓 0.0000066 (0 hom., cov: 32)
• Consequence: MAPK1 NM_002745.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.97

Genes affected

MAPK1 (HGNC:6871): (mitogen-activated protein kinase 1) This gene encodes a member of the MAP kinase family. MAP kinases, also known as extracellular signal-regulated kinases (ERKs), act as an integration point for multiple biochemical signals, and are involved in a wide variety of cellular processes such as proliferation, differentiation, transcription regulation and development. The activation of this kinase requires its phosphorylation by upstream kinases. Upon activation, this kinase translocates to the nucleus of the stimulated cells, where it phosphorylates nuclear targets. One study also suggests that this protein acts as a transcriptional repressor independent of its kinase activity. The encoded protein has been identified as a moonlighting protein based on its ability to perform mechanistically distinct functions. Two alternatively spliced transcript variants encoding the same protein, but differing in the UTRs, have been reported for this gene. [provided by RefSeq, Jan 2014]

ACMG classification

Verdict is Uncertain_significance. Variant got 4 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), MAPK1. . Gene score misZ 3.6111 (greater than the threshold 3.09). Trascript score misZ 3.6223 (greater than threshold 3.09). GenCC has associacion of gene with Noonan syndrome 13.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.792

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
MAPK1	NM_002745.5	c.914A>G	p.Glu305Gly	missense_variant	7/9	ENST00000215832.11	NP_002736.3
MAPK1	NM_138957.3	c.914A>G	p.Glu305Gly	missense_variant	7/8		NP_620407.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
MAPK1	ENST00000215832.11	c.914A>G	p.Glu305Gly	missense_variant	7/9	1	NM_002745.5	ENSP00000215832	P1
MAPK1	ENST00000398822.7	c.914A>G	p.Glu305Gly	missense_variant	7/8	1		ENSP00000381803	P1
MAPK1	ENST00000544786.1	c.782A>G	p.Glu261Gly	missense_variant	6/7	1		ENSP00000440842

Frequencies

GnomAD3 genomes AF: 0.00000657 AC: 1 AN: 152232 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.0000241

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00

Gnomad OTH AF: 0.00

GnomAD4 exome Cov.: 30

GnomAD4 genome AF: 0.00000657 AC: 1 AN: 152232 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 74370

Gnomad4 AFR AF: 0.0000241

Gnomad4 AMR AF: 0.00

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.00

Gnomad4 OTH AF: 0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

GeneDx

Jul 26, 2019

Not observed in large population cohorts (Lek et al., 2016); In silico analysis, which includes protein predictors and evolutionary conservation, supports a deleterious effect; Has not been previously published as pathogenic or benign to our knowledge; Variants in candidate genes are classified as variants of uncertain significance in accordance with ACMG guidelines (Richards et al., 2015) -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.27
BayesDel_addAF	Pathogenic	0.27	D
BayesDel_noAF	Pathogenic	0.16
CADD	Pathogenic	28
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.45	T;T;.
Eigen	Uncertain	0.23
Eigen_PC	Uncertain	0.35
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Uncertain	0.94	.;D;D
M_CAP	Benign	0.065	D
MetaRNN	Pathogenic	0.79	D;D;D
MetaSVM	Benign	-0.48	T
MutationAssessor	Uncertain	2.4	M;M;.
MutationTaster	Benign	1.0	D;D;D
PrimateAI	Uncertain	0.78	T
PROVEAN	Pathogenic	-4.8	D;D;D
REVEL	Uncertain	0.53
Sift	Uncertain	0.012	D;D;D
Sift4G	Uncertain	0.042	D;D;D
Polyphen		0.13	B;B;.
Vest4		0.77
MutPred		0.56		Loss of ubiquitination at K300 (P = 0.0821);Loss of ubiquitination at K300 (P = 0.0821);.;
MVP		0.89
MPC		1.8
ClinPred		0.99	D
GERP RS		5.0
Varity_R		0.92
gMVP		0.82

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: rs2068717436; hg19: chr22-22127214;