16-10183567-GACACACACACACACACAC-GACACACACACACACACACACACACACACACACACACAC

Variant names:

• chr16-10183567-G-GACACACACACACACACACAC
• rs3219790
• ENST00000784515.1:n.209+1867_209+1868insACACACACACACACACACAC

Variant summary

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

The ENST00000784515.1(ENSG00000302122):​n.209+1867_209+1868insACACACACACACACACACAC variant causes a intron change involving the alteration of a non-conserved nucleotide. It is difficult to determine the true allele frequency of this variant because it is of type INS_BIG, 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.

• Frequency:
  • Genomes: 𝑓 0.020 (91 hom., cov: 0)
  • Failed GnomAD Quality Control
• Consequence: ENSG00000302122 ENST00000784515.1 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.32
• Publications: 9 publications found

Genes affected

ENSG00000302122 (HGNC:):

GRIN2A (HGNC:4585): (glutamate ionotropic receptor NMDA type subunit 2A) This gene encodes a member of the glutamate-gated ion channel protein family. The encoded protein is an N-methyl-D-aspartate (NMDA) receptor subunit. NMDA receptors are both ligand-gated and voltage-dependent, and are involved in long-term potentiation, an activity-dependent increase in the efficiency of synaptic transmission thought to underlie certain kinds of memory and learning. These receptors are permeable to calcium ions, and activation results in a calcium influx into post-synaptic cells, which results in the activation of several signaling cascades. Disruption of this gene is associated with focal epilepsy and speech disorder with or without cognitive disability. Alternative splicing results in multiple transcript variants. [provided by RefSeq, May 2014]

GRIN2A Gene-Disease associations (from GenCC):

• complex neurodevelopmental disorder

  Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
• Landau-Kleffner syndrome

  Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, Labcorp Genetics (formerly Invitae), G2P, Ambry Genetics
• continuous spikes and waves during sleep

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• early-onset epileptic encephalopathy and intellectual disability due to GRIN2A mutation

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• rolandic epilepsy-speech dyspraxia syndrome

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• self-limited epilepsy with centrotemporal spikes

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• neurodevelopmental disorder

  Inheritance: AR Classification: LIMITED Submitted by: G2P

ACMG classification

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

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ENSG00000302122	ENST00000784515.1	n.209+1867_209+1868insACACACACACACACACACAC		intron_variant	Intron 1 of 2
ENSG00000302122	ENST00000784516.1	n.209+1867_209+1868insACACACACACACACACACAC		intron_variant	Intron 1 of 1
ENSG00000302122	ENST00000784517.1	n.208+1867_208+1868insACACACACACACACACACAC		intron_variant	Intron 1 of 2
GRIN2A	ENST00000675398.2	c.-1124_-1123insGTGTGTGTGTGTGTGTGTGT		upstream_gene_variant				ENSP00000502752.1

Frequencies

GnomAD3 genomes AF: 0.0196 AC: 2455 AN: 125376 Hom.: 91 Cov.: 0

Gnomad AFR AF: 0.0209

Gnomad AMI AF: 0.0187

Gnomad AMR AF: 0.0178

Gnomad ASJ AF: 0.00940

Gnomad EAS AF: 0.00714

Gnomad SAS AF: 0.00788

Gnomad FIN AF: 0.0146

Gnomad MID AF: 0.00388

Gnomad NFE AF: 0.0221

Gnomad OTH AF: 0.0143

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

GnomAD4 genome Data not reliable, filtered out with message: AS_VQSR AF: 0.0196 AC: 2454 AN: 125440 Hom.: 91 Cov.: 0 AF XY: 0.0186 AC XY: 1105 AN XY: 59402

African (AFR) AF: 0.0208 AC: 674 AN: 32434

American (AMR) AF: 0.0178 AC: 227 AN: 12770

Ashkenazi Jewish (ASJ) AF: 0.00940 AC: 30 AN: 3190

East Asian (EAS) AF: 0.00716 AC: 29 AN: 4048

South Asian (SAS) AF: 0.00792 AC: 26 AN: 3282

European-Finnish (FIN) AF: 0.0146 AC: 102 AN: 7004

Middle Eastern (MID) AF: 0.00420 AC: 1 AN: 238

European-Non Finnish (NFE) AF: 0.0221 AC: 1326 AN: 59972

Other (OTH) AF: 0.0141 AC: 24 AN: 1698

Alfa AF: 0.00 Hom.: 154

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
PhyloP100		1.3

Splicing

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

Other links and lift over

dbSNP: rs3219790; hg19: chr16-10277424;