21-33266466-A-C

Position:

• chr21-33266466-A-C

Variant summary

Our verdict is Pathogenic. Variant got 10 ACMG points: 10P and 0B. PVS1 PM2

The NM_000628.5(IL10RB):​c.1A>C​(p.Met1?) variant causes a start lost change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: IL10RB NM_000628.5 start_lost
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.169

Genes affected

IL10RB (HGNC:5965): (interleukin 10 receptor subunit beta) The protein encoded by this gene belongs to the cytokine receptor family. It is an accessory chain essential for the active interleukin 10 receptor complex. Coexpression of this and IL10RA proteins has been shown to be required for IL10-induced signal transduction. This gene and three other interferon receptor genes, IFAR2, IFNAR1, and IFNGR2, form a class II cytokine receptor gene cluster located in a small region on chromosome 21. [provided by RefSeq, Jul 2008]

IFNAR2-IL10RB (HGNC:):

ACMG classification

Verdict is Pathogenic. Variant got 10 ACMG points.

• PVS1: Start lost variant, no new inframe start found.
• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
IL10RB	NM_000628.5	c.1A>C	p.Met1?	start_lost	1/7	ENST00000290200.7	NP_000619.3
IFNAR2-IL10RB	NM_001414505.1	c.710-1928A>C		intron_variant			NP_001401434.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
IL10RB	ENST00000290200.7	c.1A>C	p.Met1?	start_lost	1/7	1	NM_000628.5	ENSP00000290200	P2

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

Inflammatory bowel disease 25 Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Apr 08, 2021

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. Experimental studies and prediction algorithms are not available or were not evaluated, and the functional significance of this variant is currently unknown. This variant has not been reported in the literature in individuals with IL10RB-related conditions. This variant is not present in population databases (ExAC no frequency). This sequence change affects the initiator methionine of the IL10RB mRNA. The next in-frame methionine is located at codon 20. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Uncertain	0.057	T
BayesDel_noAF	Benign	-0.16
CADD	Benign	16
DANN	Benign	0.72
DEOGEN2	Benign	0.12	T
Eigen	Benign	-0.78
Eigen_PC	Benign	-0.84
FATHMM_MKL	Benign	0.079	N
LIST_S2	Uncertain	0.90	D
M_CAP	Uncertain	0.19	D
MetaRNN	Pathogenic	0.96	D
MetaSVM	Benign	-1.0	T
MutationTaster	Benign	1.0	N
PROVEAN	Benign	-0.65	N
REVEL	Benign	0.24
Sift	Pathogenic	0.0	D
Sift4G	Pathogenic	0.0	D
Polyphen		0.071	B
Vest4		0.72
MutPred		0.95		Loss of MoRF binding (P = 0.0735);
MVP		0.34
ClinPred		0.85	D
GERP RS		1.7
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.61
gMVP		0.48

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: chr21-34638771;