19-856007-C-T

Variant names:

• chr19-856007-C-T
• rs760080772
• NM_001972.4:c.647C>T

Variant summary

Our verdict is Uncertain significance. The variant received 5 ACMG points: 5P and 0B. PM1 PM2 PP2

The NM_001972.4(ELANE):​c.647C>T​(p.Ala216Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★). Synonymous variant affecting the same amino acid position (i.e. A216A) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: ELANE NM_001972.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.93
• Publications: 0 publications found

Genes affected

ELANE (HGNC:3309): (elastase, neutrophil expressed) Elastases form a subfamily of serine proteases that hydrolyze many proteins in addition to elastin. Humans have six elastase genes which encode structurally similar proteins. The encoded preproprotein is proteolytically processed to generate the active protease. Following activation, this protease hydrolyzes proteins within specialized neutrophil lysosomes, called azurophil granules, as well as proteins of the extracellular matrix. The enzyme may play a role in degenerative and inflammatory diseases through proteolysis of collagen-IV and elastin. This protein also degrades the outer membrane protein A (OmpA) of E. coli as well as the virulence factors of such bacteria as Shigella, Salmonella and Yersinia. Mutations in this gene are associated with cyclic neutropenia and severe congenital neutropenia (SCN). This gene is present in a gene cluster on chromosome 19. [provided by RefSeq, Jan 2016]

ELANE Gene-Disease associations (from GenCC):

• neutropenia

  Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
• cyclic hematopoiesis

  Inheritance: AD Classification: STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Orphanet
• autosomal dominant severe congenital neutropenia

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Uncertain_significance. The variant received 5 ACMG points.

• PM1: In a hotspot region, there are 7 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 4 benign, 15 uncertain in NM_001972.4
• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in the gene, where a lot of missense mutations are associated with disease in ClinVar. The gene has 53 curated pathogenic missense variants (we use a threshold of 10). The gene has 11 curated benign missense variants. Gene score misZ: 0.71822 (below the threshold of 3.09). Trascript score misZ: -0.55649 (below the threshold of 3.09). GenCC associations: The gene is linked to autosomal dominant severe congenital neutropenia, cyclic hematopoiesis, neutropenia.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ELANE	NM_001972.4	c.647C>T	p.Ala216Val	missense_variant	Exon 5 of 5	ENST00000263621.2	NP_001963.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ELANE	ENST00000263621.2	c.647C>T	p.Ala216Val	missense_variant	Exon 5 of 5	1	NM_001972.4	ENSP00000263621.1
ELANE	ENST00000590230.5	c.647C>T	p.Ala216Val	missense_variant	Exon 6 of 6	5		ENSP00000466090.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Cyclical neutropenia;C1859966:Neutropenia, severe congenital, 1, autosomal dominant Uncertain:1

Jun 11, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces alanine, which is neutral and non-polar, with valine, which is neutral and non-polar, at codon 216 of the ELANE protein (p.Ala216Val). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with ELANE-related conditions. ClinVar contains an entry for this variant (Variation ID: 579104). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) has been performed at Invitae for this missense variant, however the output from this modeling did not meet the statistical confidence thresholds required to predict the impact of this variant on ELANE protein function. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.40
BayesDel_addAF	Uncertain	0.027	T
BayesDel_noAF	Benign	-0.20
CADD	Benign	15
DANN	Benign	0.72
DEOGEN2	Benign	0.33	T;T
Eigen	Benign	-0.59
Eigen_PC	Benign	-0.52
FATHMM_MKL	Benign	0.26	N
LIST_S2	Benign	0.64	.;T
M_CAP	Pathogenic	0.53	D
MetaRNN	Uncertain	0.70	D;D
MetaSVM	Benign	-0.41	T
MutationAssessor	Benign	-0.72	N;N
PhyloP100		1.9
PrimateAI	Benign	0.35	T
PROVEAN	Benign	-0.84	.;N
REVEL	Uncertain	0.34
Sift	Benign	1.0	.;T
Sift4G	Benign	1.0	T;T
Polyphen		0.99	D;D
Vest4		0.082
MutPred		0.56		Loss of methylation at R220 (P = 0.1303);Loss of methylation at R220 (P = 0.1303);
MVP		0.89
MPC		0.66
ClinPred		0.24	T
GERP RS		3.4
Varity_R		0.27
gMVP		0.85
Mutation Taster		=65/35	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		Details are displayed if max score is > 0.2

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

Other links and lift over

dbSNP: rs760080772; hg19: chr19-856007;