rs121918524

Variant names:

• chrX-54011232-A-G
• rs121918524
• NM_015107.3:c.836T>C

Variant summary

Our verdict is Uncertain significance. The variant received 5 ACMG points: 5P and 0B. PM2 PP3_Moderate PP5

The NM_015107.3(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 NM_015107.3 missense
• Clinical Significance: Pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 2.65
• Publications: 28 publications found

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]

PHF8 Gene-Disease associations (from GenCC):

• syndromic X-linked intellectual disability Siderius type

  Inheritance: XL Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, ClinGen, G2P, Labcorp Genetics (formerly Invitae)

ACMG classification

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

• PM2: Very rare variant in population databases, with high coverage
• 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 VariationId is 10800.Status of the report is no_assertion_criteria_provided, 0 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_015107.3. 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
	PHF8	NM_015107.3	MANE Select	c.836T>C	p.Phe279Ser	missense	Exon 8 of 22	NP_055922.1	Q9UPP1-2
	PHF8	NM_001184896.1		c.944T>C	p.Phe315Ser	missense	Exon 8 of 22	NP_001171825.1	Q9UPP1-1
	PHF8	NM_001441096.1		c.944T>C	p.Phe315Ser	missense	Exon 8 of 22	NP_001428025.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PHF8	ENST00000338154.11	TSL:1 MANE Select	c.836T>C	p.Phe279Ser	missense	Exon 8 of 22	ENSP00000338868.6	Q9UPP1-2
	PHF8	ENST00000357988.9	TSL:1	c.944T>C	p.Phe315Ser	missense	Exon 8 of 22	ENSP00000350676.5	Q9UPP1-1
	PHF8	ENST00000322659.12	TSL:1	c.836T>C	p.Phe279Ser	missense	Exon 8 of 22	ENSP00000319473.8	Q9UPP1-5

Frequencies

GnomAD3 genomes Cov.: 23

GnomAD4 exome Cov.: 29

GnomAD4 genome Cov.: 23

Alfa AF: 0.00 Hom.: 0

ClinVar

ClinVar submissions

Significance: Pathogenic

Revision: no assertion criteria provided

Pathogenic	VUS	Benign	Condition
1	-	-	Syndromic X-linked intellectual disability Siderius type (1)

Computational scores

Source: dbNSFP v4.9

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
M_CAP	Pathogenic	0.77	D
MetaRNN	Pathogenic	0.91	D
MetaSVM	Uncertain	0.18	D
MutationAssessor	Uncertain	2.4	M
PhyloP100		2.7
PrimateAI	Uncertain	0.72	T
PROVEAN	Pathogenic	-6.0	D
REVEL	Pathogenic	0.79
Sift	Pathogenic	0.0	D
Sift4G	Pathogenic	0.0010	D
Polyphen		1.0	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
Mutation Taster		=6/94	disease causing (ClinVar)

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: rs121918524; hg19: chrX-54037665;