19-5039863-C-T

Variant summary

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

The NM_015015.3(KDM4B):c.169C>T(p.Arg57Trp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: KDM4B NM_015015.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.920

Genes affected

KDM4B (HGNC:29136): (lysine demethylase 4B) Enables histone H3-methyl-lysine-36 demethylase activity and histone H3-methyl-lysine-9 demethylase activity. Involved in histone H3-K36 demethylation and histone H3-K9 demethylation. Located in cytosol and nucleoplasm. Implicated in autosomal dominant non-syndromic intellectual disability; breast cancer; colorectal cancer; malignant peripheral nerve sheath tumor; and stomach cancer. Biomarker of several diseases, including alopecia areata; lung cancer; medulloblastoma; prostate cancer; and stomach cancer. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
KDM4B	NM_015015.3	c.169C>T	p.Arg57Trp	missense_variant	4/23	ENST00000159111.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
KDM4B	ENST00000159111.9	c.169C>T	p.Arg57Trp	missense_variant	4/23	1	NM_015015.3	P2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 1460536 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 726598

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: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Inborn genetic diseases Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Nov 17, 2021

The c.169C>T (p.R57W) alteration is located in exon 4 (coding exon 2) of the KDM4B gene. This alteration results from a C to T substitution at nucleotide position 169, causing the arginine (R) at amino acid position 57 to be replaced by a tryptophan (W). The KDM4B c.169C>T alteration was flagged as a low confidence call in the Genome Aggregation Database (gnomAD). This amino acid position is highly conserved in available vertebrate species. This missense alteration is located in a region that has a low rate of benign missense variation (Lek, 2016; Firth, 2009). The in silico prediction for this alteration is inconclusive. 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	Pathogenic	0.99
BayesDel_addAF	Pathogenic	0.23	D
BayesDel_noAF	Uncertain	0.090
Cadd	Benign	22
Dann	Uncertain	1.0
DEOGEN2	Benign	0.35	T;.;T;.;T
Eigen	Benign	-0.12
Eigen_PC	Benign	-0.38
FATHMM_MKL	Benign	0.43	N
LIST_S2	Pathogenic	0.99	D;D;D;D;.
M_CAP	Pathogenic	0.30	D
MetaRNN	Uncertain	0.73	D;D;D;D;D
MetaSVM	Uncertain	-0.15	T
MutationTaster	Benign	1.0	D;D;D
PrimateAI	Pathogenic	0.83	D
Sift4G	Pathogenic	0.0	D;D;D;D;D
Polyphen		1.0	D;.;.;D;D
Vest4		0.79
MutPred		0.50		Loss of solvent accessibility (P = 6e-04);Loss of solvent accessibility (P = 6e-04);Loss of solvent accessibility (P = 6e-04);Loss of solvent accessibility (P = 6e-04);Loss of solvent accessibility (P = 6e-04);
MVP		0.68
MPC		2.6
ClinPred		0.99	D
GERP RS		-1.3
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
gMVP		0.95

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: rs1599476531; hg19: chr19-5039874;