Genetic Variant MAP2K2:p.Ile220Ile (chr19-4101064-G-A) – ACMG Classification: Likely_benign (-3 pts)

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 2P and 5B. PM2BP4_ModerateBP6_ModerateBP7

The NM_030662.4(MAP2K2):c.660C>T(p.Ile220Ile) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★). Synonymous variant affecting the same amino acid position (i.e. I220I) has been classified as Benign.

Frequency

Genomes: not found (cov: 31)

Exomes 𝑓: 0.0000035 ( 0 hom. )

Failed GnomAD Quality Control

Consequence

MAP2K2
NM_030662.4 synonymous

Scores

Clinical Significance

Likely benign criteria provided, single submitter B:1

Conservation

PhyloP100: -0.203

Publications

39 publications found

Variant links:

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

MAP2K2 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -3 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.31).

BP6

Variant 19-4101064-G-A is Benign according to our data. Variant chr19-4101064-G-A is described in ClinVar as Likely_benign. ClinVar VariationId is 2913078.Status of the report is criteria_provided_single_submitter, 1 stars.

BP7

Synonymous conserved (PhyloP=-0.203 with no splicing effect.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MAP2K2	NM_030662.4 link	c.660C>T	p.Ile220Ile	synonymous_variant	Exon 6 of 11	ENST00000262948.10	NP_109587.1	P36507
MAP2K2	NM_001440688.1 link	c.660C>T	p.Ile220Ile	synonymous_variant	Exon 6 of 9		NP_001427617.1
MAP2K2	NM_001440689.1 link	c.90C>T	p.Ile30Ile	synonymous_variant	Exon 4 of 9		NP_001427618.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MAP2K2	ENST00000262948.10 link	c.660C>T	p.Ile220Ile	synonymous_variant	Exon 6 of 11	1	NM_030662.4	ENSP00000262948.4		P36507

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

Data not reliable, filtered out with message: AS_VQSR

AF:

0.00000349

AC:

AN:

1433788

Hom.:

Cov.:

AF XY:

0.00000422

AC XY:

AN XY:

710736

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

32712

American (AMR)

AF:

0.00

AC:

AN:

40374

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25642

East Asian (EAS)

AF:

0.0000264

AC:

AN:

37916

South Asian (SAS)

AF:

0.00

AC:

AN:

82484

European-Finnish (FIN)

AF:

0.00

AC:

AN:

51460

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5406

European-Non Finnish (NFE)

AF:

0.00000364

AC:

AN:

1098486

Other (OTH)

AF:

0.00

AC:

AN:

59308

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.485

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

Cov.:

Alfa

AF:

0.00

Hom.:

8604

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

RASopathy

Benign:1

May 15, 2023

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.31

CADD

Benign

(source)

DANN

Benign

0.86

PhyloP100

-0.20

PromoterAI

-0.060

Neutral

(source)

Mutation Taster

=100/0

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.070

Details are displayed if max score is > 0.2

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

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over