chr19-4101285-A-G

Position:

• chr19-4101285-A-G

Variant summary

Our verdict is Benign. Variant got -13 ACMG points: 0P and 13B. BP4_Strong BP6 BS1 BS2

The NM_030662.4(MAP2K2):​c.529-5T>C variant causes a splice region, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000561 in 1,425,368 control chromosomes in the GnomAD database, including 2 homozygotes. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000056 (2 hom.)
• Consequence: MAP2K2 NM_030662.4 splice_region, intron
• Scores: Splicing: ADA: 0.00007451
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1 B:2
• Conservation: PhyloP100: 0.00500

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 (HGNC:):

ACMG classification

Verdict is Benign. Variant got -13 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.87).
• BP6: Variant 19-4101285-A-G is Benign according to our data. Variant chr19-4101285-A-G is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 261932.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=2, Uncertain_significance=1}.
• BS1: Variant frequency is greater than expected in population mid. gnomad4_exome allele frequency = 0.00000561 (8/1425368) while in subpopulation MID AF= 0.00105 (6/5714). AF 95% confidence interval is 0.000456. There are 2 homozygotes in gnomad4_exome. There are 4 alleles in male gnomad4_exome subpopulation. Median coverage is 37. This position pass quality control queck.
• BS2: High AC in GnomAdExome4 at 8 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
MAP2K2	NM_030662.4	c.529-5T>C		splice_region_variant, intron_variant		ENST00000262948.10	NP_109587.1
MAP2K2	XM_006722799.3	c.529-5T>C		splice_region_variant, intron_variant			XP_006722862.1
MAP2K2	XM_047439100.1	c.-42-5T>C		splice_region_variant, intron_variant			XP_047295056.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
MAP2K2	ENST00000262948.10	c.529-5T>C		splice_region_variant, intron_variant		1	NM_030662.4	ENSP00000262948.4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD3 exomes AF: 0.0000105 AC: 2 AN: 191354 Hom.: 0 AF XY: 0.0000195 AC XY: 2 AN XY: 102430

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000364

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000122

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000561 AC: 8 AN: 1425368 Hom.: 2 Cov.: 37 AF XY: 0.00000567 AC XY: 4 AN XY: 705598

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.0000259

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 9.14e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:1 Benign:2

Revision: criteria provided, conflicting classifications

Submissions by phenotype

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

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

Dec 27, 2016

Variant summary: The MAP2K2 c.529-5T>C variant involves the alteration of a non-conserved intronic nucleotide. Mutation Taster predicts a benign outcome for this variant. 5/5 splice prediction tools predict no significant impact on normal splicing. However, these predictions have yet to be confirmed by functional studies. This variant was found in 1/34908 control chromosomes at a frequency of 0.0000286, which is approximately 11 times the estimated maximal expected allele frequency of a pathogenic MAP2K2 variant (0.0000025), suggesting this variant is possibly a benign polymorphism. However, single variant occurrence is not sufficient enough to rule out chance occurrence or ascertainment bias. One clinical diagnostic laboratory has classified this variant as likely benign without evidence to independently evaluate. The variant of interest has not, to our knowledge, been reported in affected individuals in literature. Because of the absence of clinical information and the lack of functional studies, the variant is classified as a variant of uncertain significance (VUS) until additional information becomes available. -

not specified Benign:1

Likely benign, criteria provided, single submitter

clinical testing

PreventionGenetics, part of Exact Sciences

-

- -

RASopathy Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jul 12, 2023

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.87
CADD	Benign	1.0
DANN	Benign	0.67

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Benign	0.000075
dbscSNV1_RF	Benign	0.0080
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: rs766943752; hg19: chr19-4101283;