rs863224886

Variant names:

• chrX-45090821-C-T
• rs863224886
• NM_001291415.2:c.3991C>T
• KDM6A p.Arg1331*

Variant summary

Our verdict is Pathogenic. The variant received 18 ACMG points: 18P and 0B. PVS1 PM2 PP5_Very_Strong

The NM_001291415.2(KDM6A):​c.3991C>T​(p.Arg1331*) variant causes a stop gained 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. Variant has been reported in ClinVar as Likely pathogenic (★★). Variant results in nonsense mediated mRNA decay.

• Frequency: Genomes: not found (cov: 22)
• Consequence: KDM6A NM_001291415.2 stop_gained
• Clinical Significance: Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:4 O:1
• Conservation: PhyloP100: 3.51
• Publications: 10 publications found

Genes affected

KDM6A (HGNC:12637): (lysine demethylase 6A) This gene is located on the X chromosome and is the corresponding locus to a Y-linked gene which encodes a tetratricopeptide repeat (TPR) protein. The encoded protein of this gene contains a JmjC-domain and catalyzes the demethylation of tri/dimethylated histone H3. Multiple alternatively spliced transcript variants have been found for this gene. [provided by RefSeq, Apr 2014]

KDM6A Gene-Disease associations (from GenCC):

• Kabuki syndrome 2

  Inheritance: XL Classification: DEFINITIVE, STRONG Submitted by: G2P, Labcorp Genetics (formerly Invitae), Ambry Genetics, ClinGen
• Kabuki syndrome

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Pathogenic. The variant received 18 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant X-45090821-C-T is Pathogenic according to our data. Variant chrX-45090821-C-T is described in ClinVar as Pathogenic/Likely_pathogenic. ClinVar VariationId is 216950.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001291415.2. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	KDM6A	NM_001291415.2	MANE Select	c.3991C>T	p.Arg1331*	stop_gained	Exon 27 of 30	NP_001278344.1	A0A087X0R0
	KDM6A	NM_001419809.1		c.3991C>T	p.Arg1331*	stop_gained	Exon 27 of 31	NP_001406738.1
	KDM6A	NM_001419810.1		c.3889C>T	p.Arg1297*	stop_gained	Exon 26 of 30	NP_001406739.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	KDM6A	ENST00000611820.5	TSL:1 MANE Select	c.3991C>T	p.Arg1331*	stop_gained	Exon 27 of 30	ENSP00000483595.2	A0A087X0R0
	KDM6A	ENST00000382899.9	TSL:1	c.3856C>T	p.Arg1286*	stop_gained	Exon 26 of 29	ENSP00000372355.6	F8W8R6
	KDM6A	ENST00000377967.9	TSL:1	c.3835C>T	p.Arg1279*	stop_gained	Exon 26 of 29	ENSP00000367203.4	O15550

Frequencies

GnomAD3 genomes Cov.: 22

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 22

Alfa AF: 0.00 Hom.: 0

ClinVar

ClinVar submissions

Significance: Pathogenic/Likely pathogenic

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
3	-	-	Kabuki syndrome 2 (3)
1	-	-	not provided (1)
-	-	-	Medulloblastoma WNT activated (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.74	D
BayesDel_noAF	Pathogenic	0.63
CADD	Pathogenic	40
DANN	Uncertain	1.0
FATHMM_MKL	Uncertain	0.93	D
PhyloP100		3.5
PromoterAI		-0.012	Neutral
Mutation Taster		=0/200	disease causing (ClinVar)

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

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Other links and lift over

dbSNP: rs863224886;

hg19: chrX-44950066;

COSMIC: COSV65037841;

COSMIC: COSV65037841;