NM_018255.4:c.217+2dupT

Variant names:

• chr18-36133317-G-GT
• rs1371468990
• NM_018255.4:c.217+2dupT

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_018255.4(ELP2):​c.217+2dupT variant causes a splice region, intron change. The variant allele was found at a frequency of 0.00000206 in 1,456,742 control chromosomes in the GnomAD database, with no homozygous occurrence. 1/1 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: ELP2 NM_018255.4 splice_region, intron
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 4.66
• Publications: 0 publications found

Genes affected

ELP2 (HGNC:18248): (elongator acetyltransferase complex subunit 2) The protein encoded by this gene is a core subunit of the elongator complex, a histone acetyltransferase complex that associates with RNA polymerase II. In addition to histone acetylation, the encoded protein effects transcriptional elongation and may help remodel chromatin. [provided by RefSeq, May 2016]

ELP2 Gene-Disease associations (from GenCC):

• intellectual disability, autosomal recessive 58

  Inheritance: AR Classification: STRONG, MODERATE, LIMITED Submitted by: G2P, Labcorp Genetics (formerly Invitae), Ambry Genetics

ACMG classification

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: Splicing predictors support a deleterious effect. Scorers claiming Pathogenic: max_spliceai. No scorers claiming Uncertain. No scorers claiming Benign.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_018255.4. 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
	ELP2	NM_018255.4	MANE Select	c.217+2dupT		splice_region intron	N/A	NP_060725.1	Q6IA86-1
	ELP2	NM_001242875.3		c.217+2dupT		splice_region intron	N/A	NP_001229804.1	Q6IA86-6
	ELP2	NM_001324466.2		c.217+2dupT		splice_region intron	N/A	NP_001311395.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ELP2	ENST00000358232.11	TSL:1 MANE Select	c.217+1_217+2insT		splice_donor intron	N/A	ENSP00000350967.6	Q6IA86-1
	ELP2	ENST00000423854.6	TSL:1	c.217+1_217+2insT		splice_donor intron	N/A	ENSP00000391202.2	Q6IA86-7
	ELP2	ENST00000542824.5	TSL:1	c.217+1_217+2insT		splice_donor intron	N/A	ENSP00000443800.1	Q6IA86-2

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000206 AC: 3 AN: 1456742 Hom.: 0 Cov.: 29 AF XY: 0.00000138 AC XY: 1 AN XY: 725022

African (AFR) AF: 0.00 AC: 0 AN: 33374

American (AMR) AF: 0.00 AC: 0 AN: 44716

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26094

East Asian (EAS) AF: 0.00 AC: 0 AN: 39652

South Asian (SAS) AF: 0.00 AC: 0 AN: 86158

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53410

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5748

European-Non Finnish (NFE) AF: 0.00000271 AC: 3 AN: 1107354

Other (OTH) AF: 0.00 AC: 0 AN: 60236

GnomAD4 genome Cov.: 33

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000378

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	Inborn genetic diseases (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		4.7

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.99		Details are displayed if max score is > 0.2
DS_DL_spliceai		0.99		Position offset: -1

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

Other links and lift over

dbSNP: rs1371468990; hg19: chr18-33713280;