chr1-67320407-G-A

Position:

• chr1-67320407-G-A

Variant summary

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

The NM_001374259.2(IL12RB2):​c.39G>A​(p.Met13Ile) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. M13V) has been classified as Benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: IL12RB2 NM_001374259.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.505

Genes affected

IL12RB2 (HGNC:5972): (interleukin 12 receptor subunit beta 2) The protein encoded by this gene is a type I transmembrane protein identified as a subunit of the interleukin 12 receptor complex. The coexpression of this and IL12RB1 proteins was shown to lead to the formation of high-affinity IL12 binding sites and reconstitution of IL12 dependent signaling. The expression of this gene is up-regulated by interferon gamma in Th1 cells, and plays a role in Th1 cell differentiation. The up-regulation of this gene is found to be associated with a number of infectious diseases, such as Crohn's disease and leprosy, which is thought to contribute to the inflammatory response and host defense. Several transcript variants encoding different isoforms and non-protein coding transcripts have been found for this gene. [provided by RefSeq, Apr 2012]

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=0.038404077).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
IL12RB2	NM_001374259.2	c.39G>A	p.Met13Ile	missense_variant	3/17	ENST00000674203.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
IL12RB2	ENST00000674203.2	c.39G>A	p.Met13Ile	missense_variant	3/17		NM_001374259.2	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Oct 20, 2022

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. 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 isoleucine amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect protein function. This variant has not been reported in the literature in individuals affected with IL12RB2-related conditions. This variant is not present in population databases (gnomAD no frequency). This sequence change replaces methionine, which is neutral and non-polar, with isoleucine, which is neutral and non-polar, at codon 13 of the IL12RB2 protein (p.Met13Ile). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.11
BayesDel_addAF	Benign	-0.32	T
BayesDel_noAF	Benign	-0.69
CADD	Benign	0.16
DANN	Benign	0.56
DEOGEN2	Benign	0.044	T;.;.;.;T
Eigen	Benign	-1.3
Eigen_PC	Benign	-1.2
FATHMM_MKL	Benign	0.023	N
LIST_S2	Benign	0.19	.;T;T;T;T
M_CAP	Benign	0.0031	T
MetaRNN	Benign	0.038	T;T;T;T;T
MetaSVM	Benign	-0.93	T
MutationAssessor	Benign	-2.0	N;N;.;N;N
MutationTaster	Benign	1.0	N;N;N;N
PrimateAI	Benign	0.33	T
PROVEAN	Benign	0.71	N;N;N;N;.
REVEL	Benign	0.012
Sift	Benign	1.0	T;T;T;T;.
Sift4G	Benign	1.0	T;T;T;T;.
Polyphen		0.0	B;.;.;B;B
Vest4		0.069
MutPred		0.39		Gain of catalytic residue at M13 (P = 0.039);Gain of catalytic residue at M13 (P = 0.039);Gain of catalytic residue at M13 (P = 0.039);Gain of catalytic residue at M13 (P = 0.039);Gain of catalytic residue at M13 (P = 0.039);
MVP		0.65
MPC		0.15
ClinPred		0.016	T
GERP RS		1.2
Varity_R		0.058
gMVP		0.47

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr1-67786090;