NM_018486.3:c.421_423delTGG

Variant names:

• chrX-72567902-GCCA-G
• rs587783664
• NM_018486.3:c.421_423delTGG

Variant summary

Our verdict is Uncertain significance. The variant received 5 ACMG points: 5P and 0B. PM1 PM2 PM4_Supporting

The NM_018486.3(HDAC8):​c.421_423delTGG​(p.Trp141del) variant causes a conservative inframe deletion change involving the alteration of a 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: 22)
• Consequence: HDAC8 NM_018486.3 conservative_inframe_deletion
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 9.04
• Publications: 0 publications found

Genes affected

HDAC8 (HGNC:13315): (histone deacetylase 8) Histones play a critical role in transcriptional regulation, cell cycle progression, and developmental events. Histone acetylation/deacetylation alters chromosome structure and affects transcription factor access to DNA. The protein encoded by this gene belongs to class I of the histone deacetylase family. It catalyzes the deacetylation of lysine residues in the histone N-terminal tails and represses transcription in large multiprotein complexes with transcriptional co-repressors. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Oct 2009]

HDAC8 Gene-Disease associations (from GenCC):

• Cornelia de Lange syndrome

  Inheritance: AD, XL Classification: DEFINITIVE, SUPPORTIVE Submitted by: Orphanet, ClinGen
• Cornelia de Lange syndrome 5

  Inheritance: XL Classification: DEFINITIVE, STRONG Submitted by: G2P, Labcorp Genetics (formerly Invitae), Ambry Genetics
• Wilson-Turner syndrome

  Inheritance: XL Classification: SUPPORTIVE Submitted by: Orphanet

ENSG00000285547 (HGNC:):

ACMG classification

Our verdict: Uncertain_significance. The variant received 5 ACMG points.

• PM1: In a hotspot region, there are 3 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 7 uncertain in NM_018486.3
• PM2: Very rare variant in population databases, with high coverage
• PM4: Nonframeshift variant in NON repetitive region in NM_018486.3. Strenght limited to Supporting due to length of the change: 1aa.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_018486.3. 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
	HDAC8	NM_018486.3	MANE Select	c.421_423delTGG	p.Trp141del	conservative_inframe_deletion	Exon 4 of 11	NP_060956.1
	HDAC8	NM_001410725.1		c.421_423delTGG	p.Trp141del	conservative_inframe_deletion	Exon 4 of 12	NP_001397654.1
	HDAC8	NM_001410727.1		c.421_423delTGG	p.Trp141del	conservative_inframe_deletion	Exon 4 of 10	NP_001397656.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	HDAC8	ENST00000373573.9	TSL:1 MANE Select	c.421_423delTGG	p.Trp141del	conservative_inframe_deletion	Exon 4 of 11	ENSP00000362674.3
	ENSG00000285547	ENST00000648922.1		c.421_423delTGG	p.Trp141del	conservative_inframe_deletion	Exon 4 of 12	ENSP00000497072.1
	HDAC8	ENST00000412342.6	TSL:1	n.*119_*121delTGG		non_coding_transcript_exon	Exon 3 of 7	ENSP00000400180.1

Frequencies

GnomAD3 genomes Cov.: 22

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome Cov.: 22

ClinVar

ClinVar submissions as Germline

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	Cornelia de Lange syndrome 5 (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		9.0

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

Other links and lift over

dbSNP: rs587783664; hg19: chrX-71787752;