chr3-50617648-C-CGG

Variant names:

• chr3-50617648-C-CGG
• rs751967432
• NM_001243925.2:c.89_90dupGG

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_001243925.2(MAPKAPK3):​c.89_90dupGG​(p.Arg31GlyfsTer10) variant causes a frameshift change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000686 in 1,457,352 control chromosomes in the GnomAD database, with no homozygous occurrence. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.9e-7 (0 hom.)
• Consequence: MAPKAPK3 NM_001243925.2 frameshift
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.386
• Publications: 0 publications found

Genes affected

MAPKAPK3 (HGNC:6888): (MAPK activated protein kinase 3) This gene encodes a member of the Ser/Thr protein kinase family. This kinase functions as a mitogen-activated protein kinase (MAP kinase)- activated protein kinase. MAP kinases are also known as extracellular signal-regulated kinases (ERKs), act as an integration point for multiple biochemical signals. This kinase was shown to be activated by growth inducers and stress stimulation of cells. In vitro studies demonstrated that ERK, p38 MAP kinase and Jun N-terminal kinase were all able to phosphorylate and activate this kinase, which suggested the role of this kinase as an integrative element of signaling in both mitogen and stress responses. This kinase was reported to interact with, phosphorylate and repress the activity of E47, which is a basic helix-loop-helix transcription factor known to be involved in the regulation of tissue-specific gene expression and cell differentiation. Alternate splicing results in multiple transcript variants that encode the same protein. [provided by RefSeq, Sep 2011]

MAPKAPK3 Gene-Disease associations (from GenCC):

• patterned macular dystrophy 3

  Inheritance: AD, Unknown Classification: STRONG, SUPPORTIVE, LIMITED Submitted by: Orphanet, G2P, Labcorp Genetics (formerly Invitae)

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001243925.2. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MAPKAPK3	NM_001243925.2	MANE Select	c.89_90dupGG	p.Arg31GlyfsTer10	frameshift	Exon 2 of 11	NP_001230854.1	Q16644
	MAPKAPK3	NM_001243926.2		c.89_90dupGG	p.Arg31GlyfsTer10	frameshift	Exon 4 of 13	NP_001230855.1	Q16644
	MAPKAPK3	NM_004635.5		c.89_90dupGG	p.Arg31GlyfsTer10	frameshift	Exon 2 of 11	NP_004626.1	Q16644

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MAPKAPK3	ENST00000621469.5	TSL:1 MANE Select	c.89_90dupGG	p.Arg31GlyfsTer10	frameshift	Exon 2 of 11	ENSP00000478922.1	Q16644
	MAPKAPK3	ENST00000357955.6	TSL:1	c.89_90dupGG	p.Arg31GlyfsTer10	frameshift	Exon 2 of 11	ENSP00000350639.2	Q16644
	MAPKAPK3	ENST00000446044.5	TSL:1	c.89_90dupGG	p.Arg31GlyfsTer10	frameshift	Exon 4 of 13	ENSP00000396467.1	Q16644

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.86e-7 AC: 1 AN: 1457352 Hom.: 0 Cov.: 30 AF XY: 0.00 AC XY: 0 AN XY: 725040

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.00 AC: 0 AN: 33412

American (AMR) AF: 0.00 AC: 0 AN: 44722

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26112

East Asian (EAS) AF: 0.00 AC: 0 AN: 39682

South Asian (SAS) AF: 0.00 AC: 0 AN: 86180

European-Finnish (FIN) AF: 0.0000190 AC: 1 AN: 52558

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5532

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1108934

Other (OTH) AF: 0.00 AC: 0 AN: 60220

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		-0.39

Splicing

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

Other links and lift over

dbSNP: rs751967432; hg19: chr3-50655079;