1-186870501-GC-AG

Variant names:

• chr1-186870501-GC-AG
• NM_024420.3:c.100_101delGCinsAG
• PLA2G4A p.Ala34Ser

Variant summary

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

The NM_024420.3(PLA2G4A):​c.100_101delGCinsAG​(p.Ala34Ser) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. It is difficult to determine the true allele frequency of this variant because it is of type MNV, and the frequency of such variant types in population databases may be underestimated and unreliable. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A34T) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: PLA2G4A NM_024420.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 5.41
• Publications: 0 publications found

Genes affected

PLA2G4A (HGNC:9035): (phospholipase A2 group IVA) This gene encodes a member of the cytosolic phospholipase A2 group IV family. The enzyme catalyzes the hydrolysis of membrane phospholipids to release arachidonic acid which is subsequently metabolized into eicosanoids. Eicosanoids, including prostaglandins and leukotrienes, are lipid-based cellular hormones that regulate hemodynamics, inflammatory responses, and other intracellular pathways. The hydrolysis reaction also produces lysophospholipids that are converted into platelet-activating factor. The enzyme is activated by increased intracellular Ca(2+) levels and phosphorylation, resulting in its translocation from the cytosol and nucleus to perinuclear membrane vesicles. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jul 2015]

PLA2G4A Gene-Disease associations (from GenCC):

• cytosolic phospholipase-A2 alpha deficiency associated bleeding disorder

  Inheritance: AR Classification: STRONG, MODERATE, SUPPORTIVE, LIMITED Submitted by: Ambry Genetics, Orphanet, Labcorp Genetics (formerly Invitae), ClinGen
• cryptogenic multifocal ulcerous stenosing enteritis

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_024420.3. 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
	PLA2G4A	NM_024420.3	MANE Select	c.100_101delGCinsAG	p.Ala34Ser	missense	N/A	NP_077734.2	P47712
	PLA2G4A	NM_001311193.2		c.100_101delGCinsAG	p.Ala34Ser	missense	N/A	NP_001298122.2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PLA2G4A	ENST00000367466.4	TSL:1 MANE Select	c.100_101delGCinsAG	p.Ala34Ser	missense	N/A	ENSP00000356436.3	P47712
	PLA2G4A	ENST00000851114.1		c.100_101delGCinsAG	p.Ala34Ser	missense	N/A	ENSP00000521173.1
	PLA2G4A	ENST00000851115.1		c.100_101delGCinsAG	p.Ala34Ser	missense	N/A	ENSP00000521174.1

Frequencies

GnomAD3 genomes Cov.: 32

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		5.4

Splicing

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

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Other links and lift over

hg19: chr1-186839633;