chrX-54011232-A-G

Position:

• chrX-54011232-A-G

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM2 PP2 PP3_Moderate PP5

The ENST00000338154.11(PHF8):​c.836T>C​(p.Phe279Ser) variant causes a missense change involving the alteration of a non-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 Pathogenic (no stars).

• Frequency: Genomes: not found (cov: 23)
• Consequence: PHF8 ENST00000338154.11 missense
• Clinical Significance: Pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 2.65

Genes affected

PHF8 (HGNC:20672): (PHD finger protein 8) The protein encoded by this gene is a histone lysine demethylase that preferentially acts on histones in the monomethyl or dimethyl states. The encoded protein requires Fe(2+) ion, 2-oxoglutarate, and oxygen for its catalytic activity. The protein has an N-terminal PHD finger and a central Jumonji C domain. This gene is thought to function as a transcription activator. Defects in this gene are a cause of syndromic X-linked Siderius type intellectual disability (MRXSSD) and over-expression of this gene is associated with several forms of cancer. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2017]

ACMG classification

Verdict is Likely_pathogenic. Variant got 6 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), PHF8. . Gene score misZ 3.9759 (greater than the threshold 3.09). GenCC has associacion of gene with syndromic X-linked intellectual disability Siderius type.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.91
• PP5: Variant X-54011232-A-G is Pathogenic according to our data. Variant chrX-54011232-A-G is described in ClinVar as [Pathogenic]. Clinvar id is 10800.Status of the report is no_assertion_criteria_provided, 0 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
PHF8	NM_015107.3	c.836T>C	p.Phe279Ser	missense_variant	8/22	ENST00000338154.11	NP_055922.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
PHF8	ENST00000338154.11	c.836T>C	p.Phe279Ser	missense_variant	8/22	1	NM_015107.3	ENSP00000338868	P2

Frequencies

GnomAD3 genomes Cov.: 23

GnomAD4 exome Cov.: 29

GnomAD4 genome Cov.: 23

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: no assertion criteria provided

Submissions by phenotype

Syndromic X-linked intellectual disability Siderius type Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

OMIM

Aug 01, 2007

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.41	D
BayesDel_noAF	Pathogenic	0.35
CADD	Pathogenic	27
DANN	Uncertain	1.0
DEOGEN2	Benign	0.32	.;T;.;.
FATHMM_MKL	Uncertain	0.90	D
LIST_S2	Uncertain	0.96	D;D;D;D
M_CAP	Pathogenic	0.77	D
MetaRNN	Pathogenic	0.91	D;D;D;D
MetaSVM	Uncertain	0.18	D
MutationAssessor	Uncertain	2.4	.;M;.;.
MutationTaster	Benign	1.0	A;A;A;A
PrimateAI	Uncertain	0.72	T
PROVEAN	Pathogenic	-6.0	D;D;D;D
REVEL	Pathogenic	0.79
Sift	Pathogenic	0.0	D;D;D;D
Sift4G	Pathogenic	0.0010	D;D;D;D
Polyphen		1.0	D;D;.;.
Vest4		0.82
MutPred		0.71		.;Gain of disorder (P = 0.0016);.;.;
MVP		0.97
MPC		4.1
ClinPred		1.0	D
GERP RS		5.5
Varity_R		0.99
gMVP		1.0

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

Publications

LitVar

Other links and lift over

dbSNP: rs121918524; hg19: chrX-54037665;