17-21284943-A-G

Position:

• chr17-21284943-A-G

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_145109.3(MAP2K3):​c.23A>G​(p.Gln8Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000685 in 1,459,918 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: MAP2K3 NM_145109.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.231

Genes affected

MAP2K3 (HGNC:6843): (mitogen-activated protein kinase kinase 3) The protein encoded by this gene is a dual specificity protein kinase that belongs to the MAP kinase kinase family. This kinase is activated by mitogenic and environmental stress, and participates in the MAP kinase-mediated signaling cascade. It phosphorylates and thus activates MAPK14/p38-MAPK. This kinase can be activated by insulin, and is necessary for the expression of glucose transporter. Expression of RAS oncogene is found to result in the accumulation of the active form of this kinase, which thus leads to the constitutive activation of MAPK14, and confers oncogenic transformation of primary cells. The inhibition of this kinase is involved in the pathogenesis of Yersina pseudotuberculosis. Multiple alternatively spliced transcript variants that encode distinct isoforms have been reported for this gene. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Likely_benign. Variant got -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.06595442).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
MAP2K3	NM_145109.3	c.23A>G	p.Gln8Arg	missense_variant	1/12	ENST00000342679.9	NP_659731.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
MAP2K3	ENST00000342679.9	c.23A>G	p.Gln8Arg	missense_variant	1/12	1	NM_145109.3	ENSP00000345083	P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 6.85e-7 AC: 1 AN: 1459918 Hom.: 0 Cov.: 31 AF XY: 0.00000138 AC XY: 1 AN XY: 726206

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

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: 9.00e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

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

Ambry Genetics

May 07, 2024

The c.23A>G (p.Q8R) alteration is located in exon 1 (coding exon 1) of the MAP2K3 gene. This alteration results from a A to G substitution at nucleotide position 23, causing the glutamine (Q) at amino acid position 8 to be replaced by an arginine (R). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.081
BayesDel_addAF	Benign	-0.11	T
BayesDel_noAF	Benign	-0.39
CADD	Benign	17
DANN	Benign	0.83
DEOGEN2	Benign	0.12	T;T;T
Eigen	Benign	-0.81
Eigen_PC	Benign	-0.71
FATHMM_MKL	Benign	0.62	D
LIST_S2	Benign	0.47	T;.;T
M_CAP	Benign	0.079	D
MetaRNN	Benign	0.066	T;T;T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	-0.34	N;.;.
MutationTaster	Benign	1.0	N
PrimateAI	Uncertain	0.50	T
PROVEAN	Benign	-0.24	N;D;.
REVEL	Benign	0.044
Sift	Benign	0.86	T;.;.
Sift4G	Benign	0.64	T;.;.
Polyphen		0.12	B;.;.
Vest4		0.13
MutPred		0.23		Gain of MoRF binding (P = 0.0254);Gain of MoRF binding (P = 0.0254);Gain of MoRF binding (P = 0.0254);
MVP		0.63
MPC		0.16
ClinPred		0.14	T
GERP RS		0.58
Varity_R		0.036
gMVP		0.22

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr17-21188255;