chr2-32224621-T-C

Position:

• chr2-32224621-T-C

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_001199138.2(NLRC4):​c.2927A>G​(p.Glu976Gly) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000205 in 1,461,694 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: NLRC4 NM_001199138.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -0.0910

Genes affected

NLRC4 (HGNC:16412): (NLR family CARD domain containing 4) This gene encodes a member of the caspase recruitment domain-containing NLR family. Family members play essential roles in innate immune response to a wide range of pathogenic organisms, tissue damage and other cellular stresses. Mutations in this gene result in autoinflammation with infantile enterocolitis. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Oct 2014]

ACMG classification

Verdict is Likely_benign. Variant got -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.05462739).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
NLRC4	NM_001199138.2	c.2927A>G	p.Glu976Gly	missense_variant	9/9	ENST00000402280.6
NLRC4	NM_001199139.1	c.2927A>G	p.Glu976Gly	missense_variant	9/9
NLRC4	NM_021209.4	c.2927A>G	p.Glu976Gly	missense_variant	9/9
NLRC4	NM_001302504.1	c.932A>G	p.Glu311Gly	missense_variant	8/8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
NLRC4	ENST00000402280.6	c.2927A>G	p.Glu976Gly	missense_variant	9/9	1	NM_001199138.2	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000205 AC: 3 AN: 1461694 Hom.: 0 Cov.: 30 AF XY: 0.00000138 AC XY: 1 AN XY: 727156

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: 0.0000232

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.0000166

GnomAD4 genome Cov.: 32

ExAC AF: 0.00000824 AC: 1

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Periodic fever-infantile enterocolitis-autoinflammatory syndrome;C4015276:Familial cold autoinflammatory syndrome 4 Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 09, 2023

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. 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) performed at Invitae indicates that this missense variant is not expected to disrupt NLRC4 protein function. ClinVar contains an entry for this variant (Variation ID: 1460824). This variant has not been reported in the literature in individuals affected with NLRC4-related conditions. This variant is not present in population databases (gnomAD no frequency). This sequence change replaces glutamic acid, which is acidic and polar, with glycine, which is neutral and non-polar, at codon 976 of the NLRC4 protein (p.Glu976Gly). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.056
BayesDel_addAF	Benign	-0.33	T
BayesDel_noAF	Benign	-0.71
CADD	Benign	12
DANN	Benign	0.94
DEOGEN2	Benign	0.16	T;T;.;T
Eigen	Benign	-0.99
Eigen_PC	Benign	-0.97
FATHMM_MKL	Benign	0.0039	N
LIST_S2	Benign	0.53	.;.;T;T
M_CAP	Benign	0.011	T
MetaRNN	Benign	0.055	T;T;T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	-0.22	N;N;.;N
PrimateAI	Benign	0.30	T
PROVEAN	Benign	-1.2	N;N;N;N
REVEL	Benign	0.027
Sift	Benign	0.42	T;T;T;T
Polyphen		0.0	B;B;B;B
Vest4		0.099
MutPred		0.40		Loss of ubiquitination at K975 (P = 0.0661);Loss of ubiquitination at K975 (P = 0.0661);.;Loss of ubiquitination at K975 (P = 0.0661);
MVP		0.37
MPC		0.24
ClinPred		0.043	T
GERP RS		1.3
Varity_R		0.043
gMVP		0.17

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.0		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: rs775671534; hg19: chr2-32449690;