Variant summary

Our verdict is Pathogenic. The variant received 10 ACMG points: 10P and 0B. PM2PM5PP3_StrongPP5_Moderate

The NM_018486.3(HDAC8):c.770C>A(p.Pro257His) 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 (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P257S) has been classified as Likely pathogenic.

Frequency

Genomes: not found (cov: 23)

Consequence

HDAC8
NM_018486.3 missense

Scores

Clinical Significance

Likely pathogenic criteria provided, single submitter P:1

Conservation

PhyloP100: 9.41

Publications

1 publications found

Variant links:

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

HDAC8 links:

ENSG00000285547 (HGNC:):

ENSG00000285547 links:

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ACMG classification

Classification was made for transcript

Our verdict: Pathogenic. The variant received 10 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PM5

Other missense variant is known to change same aminoacid residue: Variant chrX-72464700-G-A is described in ClinVar as Likely_pathogenic. ClinVar VariationId is 689725.Status of the report is criteria_provided_single_submitter, 1 stars.

PP3

MetaRNN computational evidence supports a deleterious effect, 0.99

PP5

Variant X-72464699-G-T is Pathogenic according to our data. Variant chrX-72464699-G-T is described in ClinVar as Likely_pathogenic. ClinVar VariationId is 211143.Status of the report is criteria_provided_single_submitter, 1 stars.

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

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
HDAC8	NM_018486.3	MANE Select	c.770C>A	p.Pro257His	missense	Exon 8 of 11	NP_060956.1
HDAC8	NM_001410725.1		c.770C>A	p.Pro257His	missense	Exon 8 of 12	NP_001397654.1
HDAC8	NM_001410727.1		c.692C>A	p.Pro231His	missense	Exon 7 of 10	NP_001397656.1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
HDAC8	ENST00000373573.9	TSL:1 MANE Select	c.770C>A	p.Pro257His	missense	Exon 8 of 11	ENSP00000362674.3
ENSG00000285547	ENST00000648922.1		c.770C>A	p.Pro257His	missense	Exon 8 of 12	ENSP00000497072.1
HDAC8	ENST00000412342.6	TSL:1	n.*468C>A		non_coding_transcript_exon	Exon 7 of 7	ENSP00000400180.1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

Cov.:

GnomAD4 genome

Cov.:

Alfa

AF:

0.00

Hom.:

ClinVar

ClinVar submissions as Germline

Significance:Likely pathogenic

Revision:criteria provided, single submitter

View on ClinVar

Pathogenic

VUS

Benign

Condition

Cornelia de Lange syndrome 5 (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

1.0

BayesDel_addAF

Pathogenic

0.66

BayesDel_noAF

Pathogenic

0.71

CADD

Pathogenic

(source)

DANN

Uncertain

1.0

DEOGEN2

Pathogenic

0.84

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Uncertain

0.90

M_CAP

Pathogenic

0.66

MetaRNN

Pathogenic

0.99

MetaSVM

Pathogenic

1.1

MutationAssessor

Pathogenic

4.2

PhyloP100

9.4

PrimateAI

Uncertain

0.73

PROVEAN

Pathogenic

-8.7

REVEL

Pathogenic

0.94

Sift

Pathogenic

0.0

Sift4G

Pathogenic

0.0

Polyphen

1.0

Vest4

0.89

MutPred

0.91

Gain of methylation at K258 (P = 0.128)

MVP

0.99

MPC

2.3

ClinPred

1.0

GERP RS

5.0

PromoterAI

-0.0097

Neutral

(source)

Varity_R

0.99

gMVP

1.0

Mutation Taster

=4/96

disease causing (ClinVar)

(source)

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

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rs797045613

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

ClinVar

ClinVar submissions as Germline

Computational scores

Splicing

Publications

Other links and lift over