3-136989471-C-T

Variant summary

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

The NM_144717.4(IL20RB):c.437C>T(p.Thr146Ile) 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 (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: IL20RB NM_144717.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.331

Genes affected

IL20RB (HGNC:6004): (interleukin 20 receptor subunit beta) IL20RB and IL20RA (MIM 605620) form a heterodimeric receptor for interleukin-20 (IL20; MIM 605619) (Blumberg et al., 2001 [PubMed 11163236]).[supplied by OMIM, Feb 2009]

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=0.10075888).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
IL20RB	NM_144717.4	c.437C>T	p.Thr146Ile	missense_variant	4/7	ENST00000329582.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
IL20RB	ENST00000329582.9	c.437C>T	p.Thr146Ile	missense_variant	4/7	1	NM_144717.4	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 specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Sep 29, 2022

The c.437C>T (p.T146I) alteration is located in exon 4 (coding exon 4) of the IL20RB gene. This alteration results from a C to T substitution at nucleotide position 437, causing the threonine (T) at amino acid position 146 to be replaced by an isoleucine (I). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.14
BayesDel_addAF	Benign	-0.23	T
BayesDel_noAF	Benign	-0.58
Cadd	Benign	13
Dann	Benign	0.96
DEOGEN2	Benign	0.098	T
Eigen	Benign	-0.81
Eigen_PC	Benign	-0.74
FATHMM_MKL	Benign	0.10	N
LIST_S2	Benign	0.59	T
M_CAP	Benign	0.0075	T
MetaRNN	Benign	0.10	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	1.4	L
MutationTaster	Benign	1.0	N;N
PrimateAI	Benign	0.43	T
PROVEAN	Benign	-0.29	N
REVEL	Benign	0.072
Sift	Benign	0.34	T
Sift4G	Benign	0.38	T
Polyphen		0.0050	B
Vest4		0.12
MutPred		0.69		Loss of phosphorylation at T146 (P = 0.0616);
MVP		0.18
MPC		0.28
ClinPred		0.080	T
GERP RS		0.55
Varity_R		0.12
gMVP		0.20

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: rs1941987554; hg19: chr3-136708313;