chr1-67320443-A-G

Position:

• chr1-67320443-A-G

Variant summary

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

The NM_001374259.2(IL12RB2):​c.75A>G​(p.Ile25Met) variant causes a missense, splice region 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. 14/23 in silico tools predict a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: IL12RB2 NM_001374259.2 missense, splice_region
• Scores: Splicing: ADA: 0.6455
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.0300

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 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=0.26207626).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
IL12RB2	NM_001374259.2	c.75A>G	p.Ile25Met	missense_variant, splice_region_variant	3/17	ENST00000674203.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
IL12RB2	ENST00000674203.2	c.75A>G	p.Ile25Met	missense_variant, splice_region_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

Sep 14, 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 sequence changes on RNA splicing suggest that this variant may disrupt the consensus splice site. 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 methionine 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 isoleucine, which is neutral and non-polar, with methionine, which is neutral and non-polar, at codon 25 of the IL12RB2 protein (p.Ile25Met). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.095
BayesDel_addAF	Benign	-0.17	T
BayesDel_noAF	Benign	-0.49
CADD	Benign	22
DANN	Uncertain	0.99
DEOGEN2	Benign	0.10	T;.;.;.;T
Eigen	Uncertain	0.19
Eigen_PC	Benign	0.17
FATHMM_MKL	Benign	0.55	D
LIST_S2	Benign	0.81	.;T;T;T;T
M_CAP	Benign	0.0062	T
MetaRNN	Benign	0.26	T;T;T;T;T
MetaSVM	Benign	-1.1	T
MutationAssessor	Uncertain	2.3	M;M;.;M;M
MutationTaster	Benign	0.74	N;N;N;N
PrimateAI	Benign	0.43	T
PROVEAN	Benign	-1.3	N;N;N;N;.
REVEL	Benign	0.19
Sift	Benign	0.032	D;D;D;D;.
Sift4G	Pathogenic	0.0	D;D;D;D;.
Polyphen		1.0	D;.;.;D;D
Vest4		0.22
MutPred		0.62		Gain of ubiquitination at K22 (P = 0.0767);Gain of ubiquitination at K22 (P = 0.0767);Gain of ubiquitination at K22 (P = 0.0767);Gain of ubiquitination at K22 (P = 0.0767);Gain of ubiquitination at K22 (P = 0.0767);
MVP		0.57
MPC		0.23
ClinPred		0.61	D
GERP RS		2.7
Varity_R		0.10
gMVP		0.43

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Benign	0.65
dbscSNV1_RF	Benign	0.58
SpliceAI score (max)		0.12		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: chr1-67786126;