chr9-108900358-T-C

Position:

• chr9-108900358-T-C

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_003640.5(ELP1):​c.2032A>G​(p.Ser678Gly) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000205 in 1,461,780 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★). Synonymous variant affecting the same amino acid position (i.e. S678S) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.000021 (0 hom.)
• Consequence: ELP1 NM_003640.5 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:4
• Conservation: PhyloP100: 0.887

Genes affected

ELP1 (HGNC:5959): (elongator acetyltransferase complex subunit 1) The protein encoded by this gene is a scaffold protein and a regulator for three different kinases involved in proinflammatory signaling. The encoded protein can bind NF-kappa-B-inducing kinase and I-kappa-B kinases through separate domains and assemble them into an active kinase complex. Mutations in this gene have been associated with familial dysautonomia. Alternative splicing results in multiple transcript variants encoding different isoforms. [provided by RefSeq, Jan 2016]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.11835182).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
ELP1	NM_003640.5	c.2032A>G	p.Ser678Gly	missense_variant	19/37	ENST00000374647.10
ELP1	NM_001318360.2	c.1690A>G	p.Ser564Gly	missense_variant	19/37
ELP1	NM_001330749.2	c.985A>G	p.Ser329Gly	missense_variant	17/35
ELP1	XM_047423991.1	c.2032A>G	p.Ser678Gly	missense_variant	19/25

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ELP1	ENST00000374647.10	c.2032A>G	p.Ser678Gly	missense_variant	19/37	1	NM_003640.5	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD3 exomes AF: 0.00000795 AC: 2 AN: 251418 Hom.: 0 AF XY: 0.00000736 AC XY: 1 AN XY: 135874

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000176

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000205 AC: 30 AN: 1461780 Hom.: 0 Cov.: 32 AF XY: 0.0000220 AC XY: 16 AN XY: 727216

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.0000234

Gnomad4 OTH exome AF: 0.0000662

GnomAD4 genome Cov.: 32

Alfa AF: 0.0000564 Hom.: 0

Bravo AF: 0.00000378

ExAC AF: 0.0000165 AC: 2

EpiCase AF: 0.00

EpiControl AF: 0.0000593

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:4

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not provided Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jul 06, 2022	This sequence change replaces serine, which is neutral and polar, with glycine, which is neutral and non-polar, at codon 678 of the IKBKAP protein (p.Ser678Gly). This variant is present in population databases (rs756120509, gnomAD 0.002%). This variant has not been reported in the literature in individuals affected with IKBKAP-related conditions. ClinVar contains an entry for this variant (Variation ID: 579643). Algorithms developed to predict the effect of missense changes on protein structure and function output the following: SIFT: "Tolerated"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0". The glycine amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect 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. -
Uncertain significance, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	Jun 01, 2024	ELP1: PM2, BP4 -

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Nov 04, 2019

The p.S678G variant (also known as c.2032A>G), located in coding exon 18 of the IKBKAP gene, results from an A to G substitution at nucleotide position 2032. The serine at codon 678 is replaced by glycine, an amino acid with similar properties. This amino acid position is not well conserved in available vertebrate species, and glycine is the reference amino acid in other vertebrate species. In addition, this alteration is predicted to be tolerated by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

Familial dysautonomia Uncertain:1

Uncertain significance, no assertion criteria provided

clinical testing

Natera, Inc.

Sep 16, 2020

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.055
BayesDel_addAF	Benign	-0.24	T
BayesDel_noAF	Benign	-0.56
CADD	Benign	11
DANN	Uncertain	0.98
DEOGEN2	Benign	0.045	T;T
Eigen	Benign	-0.88
Eigen_PC	Benign	-0.85
FATHMM_MKL	Benign	0.58	D
LIST_S2	Benign	0.49	T;T
M_CAP	Benign	0.0053	T
MetaRNN	Benign	0.12	T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	1.2	L;.
MutationTaster	Benign	1.0	N;N
PrimateAI	Benign	0.33	T
PROVEAN	Benign	-1.1	N;N
REVEL	Benign	0.071
Sift	Benign	0.14	T;T
Sift4G	Benign	0.29	T;T
Polyphen		0.0050	B;.
Vest4		0.12
MutPred		0.53		Loss of disorder (P = 0.1105);.;
MVP		0.30
MPC		0.067
ClinPred		0.081	T
GERP RS		-5.0
Varity_R		0.029
gMVP		0.25

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

Publications

LitVar

Other links and lift over

dbSNP: rs756120509; hg19: chr9-111662638;