17-7845899-G-A

Position:

• chr17-7845899-G-A

Variant summary

Our verdict is Benign. Variant got -15 ACMG points: 0P and 15B. BP4_Strong BP6_Moderate BP7 BS1 BS2

The NM_001348716.2(KDM6B):​c.165G>A​(p.Pro55Pro) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000467 in 1,613,944 control chromosomes in the GnomAD database, including 2 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★).

• Frequency:
  • Genomes: 𝑓 0.0024 (2 hom., cov: 32)
  • Exomes 𝑓: 0.00027 (0 hom.)
• Consequence: KDM6B NM_001348716.2 synonymous
• Clinical Significance: Benign criteria provided, single submitter B:2
• Conservation: PhyloP100: -1.46

Genes affected

KDM6B (HGNC:29012): (lysine demethylase 6B) The protein encoded by this gene is a lysine-specific demethylase that specifically demethylates di- or tri-methylated lysine 27 of histone H3 (H3K27me2 or H3K27me3). H3K27 trimethylation is a repressive epigenetic mark controlling chromatin organization and gene silencing. This protein can also demethylate non-histone proteins such as retinoblastoma protein. Through its demethylation actvity this gene influences cellular differentiation and development, tumorigenesis, inflammatory diseases, and neurodegenerative diseases. This protein has two classical nuclear localization signals at its N-terminus. Alternative splicing results in multiple transcript variants encoding distinct isoforms. [provided by RefSeq, Feb 2017]

ACMG classification

Verdict is Benign. Variant got -15 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.61).
• BP6: Variant 17-7845899-G-A is Benign according to our data. Variant chr17-7845899-G-A is described in ClinVar as [Benign]. Clinvar id is 781252.Status of the report is criteria_provided_single_submitter, 1 stars. Variant chr17-7845899-G-A is described in Lovd as [Likely_benign].
• BP7: Synonymous conserved (PhyloP=-1.46 with no splicing effect.
• BS1: Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00238 (362/152296) while in subpopulation AFR AF= 0.00835 (347/41548). AF 95% confidence interval is 0.00763. There are 2 homozygotes in gnomad4. There are 182 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.
• BS2: High AC in GnomAd4 at 362 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
KDM6B	NM_001348716.2	c.165G>A	p.Pro55Pro	synonymous_variant	6/24	ENST00000448097.7	NP_001335645.1
KDM6B	NM_001080424.2	c.165G>A	p.Pro55Pro	synonymous_variant	5/22		NP_001073893.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
KDM6B	ENST00000448097.7	c.165G>A	p.Pro55Pro	synonymous_variant	6/24	5	NM_001348716.2	ENSP00000412513.2
KDM6B	ENST00000254846.9	c.165G>A	p.Pro55Pro	synonymous_variant	5/22	1		ENSP00000254846.5
KDM6B	ENST00000570632.1	c.165G>A	p.Pro55Pro	synonymous_variant	4/9	5		ENSP00000458445.1

Frequencies

GnomAD3 genomes AF: 0.00237 AC: 361 AN: 152178 Hom.: 2 Cov.: 32

Gnomad AFR AF: 0.00835

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000785

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000147

Gnomad OTH AF: 0.000956

GnomAD3 exomes AF: 0.000652 AC: 164 AN: 251434 Hom.: 0 AF XY: 0.000427 AC XY: 58 AN XY: 135892

Gnomad AFR exome AF: 0.00929

Gnomad AMR exome AF: 0.000260

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.0000327

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000176

Gnomad OTH exome AF: 0.000163

GnomAD4 exome AF: 0.000268 AC: 392 AN: 1461648 Hom.: 0 Cov.: 31 AF XY: 0.000216 AC XY: 157 AN XY: 727146

Gnomad4 AFR exome AF: 0.0104

Gnomad4 AMR exome AF: 0.000313

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000232

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000360

Gnomad4 OTH exome AF: 0.000364

GnomAD4 genome AF: 0.00238 AC: 362 AN: 152296 Hom.: 2 Cov.: 32 AF XY: 0.00244 AC XY: 182 AN XY: 74456

Gnomad4 AFR AF: 0.00835

Gnomad4 AMR AF: 0.000784

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.0000147

Gnomad4 OTH AF: 0.000946

Alfa AF: 0.000819 Hom.: 0

Bravo AF: 0.00274

Asia WGS AF: 0.000289 AC: 1 AN: 3478

EpiCase AF: 0.00

EpiControl AF: 0.0000593

ClinVar

Significance: Benign

Submissions summary: Benign:2

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Benign:1

Benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Dec 13, 2018

- -

KDM6B-related disorder Benign:1

Likely benign, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Feb 21, 2019

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.61
CADD	Benign	0.36
DANN	Benign	0.58

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: rs148819146; hg19: chr17-7749217;