rs1057517955

Positions:

• chrX-53199128-C-T

Variant summary

Our verdict is Pathogenic. Variant got 12 ACMG points: 12P and 0B. PM2 PP2 PP3 PP5_Very_Strong

The NM_004187.5(KDM5C):​c.2092G>A​(p.Glu698Lys) variant causes a missense change involving the alteration of a 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 Likely pathogenic (★★).

• Frequency: Genomes: not found (cov: 23)
• Consequence: KDM5C NM_004187.5 missense
• Clinical Significance: Likely pathogenic criteria provided, multiple submitters, no conflicts P:2
• Conservation: PhyloP100: 7.82

Genes affected

KDM5C (HGNC:11114): (lysine demethylase 5C) This gene is a member of the SMCY homolog family and encodes a protein with one ARID domain, one JmjC domain, one JmjN domain and two PHD-type zinc fingers. The DNA-binding motifs suggest this protein is involved in the regulation of transcription and chromatin remodeling. Mutations in this gene have been associated with X-linked cognitive disability. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Apr 2009]

KDM5C (HGNC:):

ACMG classification

Verdict is Pathogenic. Variant got 12 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in gene, where missense usually causes diseases (based on misZ statistic), KDM5C. . Gene score misZ 5.1452 (greater than the threshold 3.09). GenCC has associacion of gene with X-linked syndromic intellectual disability, syndromic X-linked intellectual disability Claes-Jensen type.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.839
• PP5: Variant X-53199128-C-T is Pathogenic according to our data. Variant chrX-53199128-C-T is described in ClinVar as [Likely_pathogenic]. Clinvar id is 372737.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
KDM5C	NM_004187.5	c.2092G>A	p.Glu698Lys	missense_variant	15/26	ENST00000375401.8	NP_004178.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
KDM5C	ENST00000375401.8	c.2092G>A	p.Glu698Lys	missense_variant	15/26	1	NM_004187.5	ENSP00000364550.4

Frequencies

GnomAD3 genomes Cov.: 23

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 23

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Inborn genetic diseases Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

Ambry Genetics

Aug 30, 2019

The p.E698K variant (also known as c.2092G>A), located in coding exon 15 of the KDM5C gene, results from a G to A substitution at nucleotide position 2092. The glutamic acid at codon 698 is replaced by lysine, an amino acid with similar properties. This alteration has been detected in two brothers with severe intellectual disability (Jensen LR et al. Am. J. Hum. Genet., 2005 Feb;76:227-36). In addition, in one functional study, authors showed that this alteration retains minimal H3K4 tri-demethylase activity (Tahiliani M et al. Nature, 2007 May;447:601-5). This variant has been determined to be the result of a de novo mutation or germline mosaicism in one family with an isolated case of intellectual disability (Ambry internal data). This amino acid position is highly conserved in available vertebrate species. In addition, this alteration is predicted to be deleterious by in silico analysis. Based on the majority of available evidence to date, this variant is likely to be pathogenic. -

not provided Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

GeneDx

Mar 22, 2016

The E698K variant in the KDM5C gene has been reported as a hemizygous pathogenic variant in two brothers with severe intellectual disability, short stature and macrocephaly (Jensen et al., 2005). The E698K variant was not observed in approximately 6500 individuals of European and African American ancestry in the NHLBI Exome Sequencing Project, indicating it is not a common benign variant in these populations. The E698K variant is a non-conservative amino acid substitution, which is likely to impact secondary protein structure as these residues differ in polarity, charge, size and/or other properties. This substitution occurs at a position that is conserved across species. Functional studies suggest the E698K variant is damaging, as the variant was shown to cause abnormal subcellular localization of the mutant protein, reduced H3K4 tri-demethylase activity and impaired transcriptional repressor abilities in U2OS cells (Tahiliani et al., 2007). Therefore, we interpret E698K as a likely pathogenic variant. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.50	D
BayesDel_noAF	Pathogenic	0.48
CADD	Uncertain	25
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.55	.;D;.;.;.
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Pathogenic	0.99	D;D;D;D;D
M_CAP	Pathogenic	0.46	D
MetaRNN	Pathogenic	0.84	D;D;D;D;D
MetaSVM	Uncertain	0.22	D
MutationAssessor	Uncertain	2.0	.;M;.;M;.
PrimateAI	Pathogenic	0.83	D
PROVEAN	Uncertain	-3.3	D;D;D;D;D
REVEL	Pathogenic	0.87
Sift	Uncertain	0.0020	D;D;D;D;D
Sift4G	Uncertain	0.0020	D;D;D;D;D
Polyphen		0.81	.;P;.;.;.
Vest4		0.66
MutPred		0.77		.;Gain of methylation at E698 (P = 0.0084);.;Gain of methylation at E698 (P = 0.0084);.;
MVP		0.99
MPC		1.8
ClinPred		0.98	D
GERP RS		4.7
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.2
Varity_R		0.92
gMVP		0.91

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: rs1057517955; hg19: chrX-53228310;