rs104895461

chr16-50710912-G-Achr16-50710912-G-C

Variant summary

Our verdict is Pathogenic. Variant got 16 ACMG points: 16P and 0B. PM2 PM5 PP3_Strong PP5_Very_Strong

The NM_001370466.1(NOD2):c.920G>A(p.Arg307Gln) variant causes a missense change. The variant allele was found at a frequency of 0.000000684 in 1,461,862 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R307W) has been classified as Pathogenic.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: NOD2 NM_001370466.1 missense
• Clinical Significance: Pathogenic criteria provided, multiple submitters, no conflicts P:4 O:1
• Conservation: PhyloP100: 4.63

Genes affected

NOD2 (HGNC:5331): (nucleotide binding oligomerization domain containing 2) This gene is a member of the Nod1/Apaf-1 family and encodes a protein with two caspase recruitment (CARD) domains and six leucine-rich repeats (LRRs). The protein is primarily expressed in the peripheral blood leukocytes. It plays a role in the immune response to intracellular bacterial lipopolysaccharides (LPS) by recognizing the muramyl dipeptide (MDP) derived from them and activating the NFKB protein. Mutations in this gene have been associated with Crohn disease and Blau syndrome. Alternatively spliced transcript variants encoding distinct isoforms have been found for this gene. [provided by RefSeq, Jun 2014]

ACMG classification

Verdict is Pathogenic. Variant got 16 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr16-50710911-C-T is described in ClinVar as [Pathogenic]. Clinvar id is 4696.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.987
• PP5: Variant 16-50710912-G-A is Pathogenic according to our data. Variant chr16-50710912-G-A is described in ClinVar as [Pathogenic]. Clinvar id is 4694.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr16-50710912-G-A is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
NOD2	NM_001370466.1	c.920G>A	p.Arg307Gln	missense_variant	4/12	ENST00000647318.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
NOD2	ENST00000647318.2	c.920G>A	p.Arg307Gln	missense_variant	4/12		NM_001370466.1	P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461862 Hom.: 0 Cov.: 39 AF XY: 0.00000138 AC XY: 1 AN XY: 727232

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: 8.99e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:4 Other:1

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not provided Pathogenic:2

Pathogenic, criteria provided, single submitter	clinical testing	GeneDx	Aug 16, 2015	The R334Q variant in the NOD2 gene has been reported previously in multiple individuals diagnosed withBlau syndrome as well as expanded features including lymphadenopathy, interstitial lung disease, hepaticgranuloma, granulomatous arthritis, erythema nodosum, hypertension and recurrent fever (Rosé et al.,2015; Akil et al., 2010; Becker et al., 2007; Miceli-Richard et al., 2001). The R334Q substitution was notobserved in approximately 6500 individuals of European and African American ancestry in the NHLBIExome Sequencing Project, indicating it is not a common benign variant in these populations. The R334Qvariant is a semi-conservative amino acid substitution, which may impact secondary protein structure asthese residues differ in some properties. This substitution occurs at a position that is conserved acrossspecies. In silico analysis predicts this variant is probably damaging to the protein structure/function. Weinterpret R334Q as a pathogenic variant. -
Pathogenic, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	Jun 01, 2021	- -

Blau syndrome Pathogenic:1 Other:1

Pathogenic, no assertion criteria provided	literature only	OMIM	Sep 01, 2001	- -
not provided, no classification provided	literature only	Unité médicale des maladies autoinflammatoires, CHRU Montpellier	-	- -

Regional enteritis;C5201146:Blau syndrome Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Invitae

Aug 16, 2022

Experimental studies have shown that this missense change affects NOD2 function (PMID: 12626759, 15044951, 25093298, 25429073). 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 expected to disrupt NOD2 protein function. ClinVar contains an entry for this variant (Variation ID: 4694). This missense change has been observed in individual(s) with Blau syndrome (PMID: 11528384, 15554080, 17393391, 20084402, 24713464, 26606664). In at least one individual the variant was observed to be de novo. It has also been observed to segregate with disease in related individuals. This variant is not present in population databases (gnomAD no frequency). This sequence change replaces arginine, which is basic and polar, with glutamine, which is neutral and polar, at codon 334 of the NOD2 protein (p.Arg334Gln). This variant disrupts the p.Arg334 amino acid residue in NOD2. Other variant(s) that disrupt this residue have been determined to be pathogenic (PMID: 11528384, 14522785, 15044951, 15459013, 17157607, 17207093, 20199415, 22509093, 24713464, 25416713). This suggests that this residue is clinically significant, and that variants that disrupt this residue are likely to be disease-causing. For these reasons, this variant has been classified as Pathogenic. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.24
BayesDel_addAF	Pathogenic	0.40	D
BayesDel_noAF	Pathogenic	0.34
Cadd	Pathogenic	29
Dann	Pathogenic	1.0
Eigen	Uncertain	0.44
Eigen_PC	Uncertain	0.33
FATHMM_MKL	Uncertain	0.91	D
LIST_S2	Uncertain	0.94	D;D
M_CAP	Pathogenic	0.43	D
MetaRNN	Pathogenic	0.99	D;D
MetaSVM	Uncertain	0.68	D
MutationTaster	Benign	1.0	A
PrimateAI	Benign	0.42	T
Polyphen		1.0	D;D
Vest4		0.83
MutPred		0.96		.;Gain of relative solvent accessibility (P = 0.2363);
MVP		0.92
MPC		0.53
ClinPred		0.98	D
GERP RS		4.8
Varity_R		0.60
gMVP		0.79

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: rs104895461; hg19: chr16-50744823; COSMIC: COSV56049453; COSMIC: COSV56049453;