X-153803643-G-A

Position:

• chrX-153803643-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_001303512.2(PDZD4):​c.2038C>T​(p.Arg680Cys) variant causes a missense change. 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 Uncertain significance (★).

• Frequency: Genomes: not found (cov: 25)
• Consequence: PDZD4 NM_001303512.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 6.55

Genes affected

PDZD4 (HGNC:21167): (PDZ domain containing 4) Predicted to be located in cell cortex. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.885

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
PDZD4	NM_001303512.2	c.2038C>T	p.Arg680Cys	missense_variant	8/8	ENST00000393758.7	NP_001290441.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
PDZD4	ENST00000393758.7	c.2038C>T	p.Arg680Cys	missense_variant	8/8	1	NM_001303512.2	ENSP00000377355.3
PDZD4	ENST00000164640.8	c.2020C>T	p.Arg674Cys	missense_variant	8/8	1		ENSP00000164640.4
PDZD4	ENST00000544474.5	c.1693C>T	p.Arg565Cys	missense_variant	6/6	1		ENSP00000442033.1

Frequencies

GnomAD3 genomes Cov.: 25

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 25

Bravo AF: 0.0000151

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

May 18, 2022

The c.2020C>T (p.R674C) alteration is located in exon 8 (coding exon 8) of the PDZD4 gene. This alteration results from a C to T substitution at nucleotide position 2020, causing the arginine (R) at amino acid position 674 to be replaced by a cysteine (C). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.97
BayesDel_addAF	Pathogenic	0.30	D
BayesDel_noAF	Pathogenic	0.20
CADD	Pathogenic	30
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.80	D;.;T
FATHMM_MKL	Uncertain	0.95	D
LIST_S2	Pathogenic	1.0	D;D;D
M_CAP	Pathogenic	0.57	D
MetaRNN	Pathogenic	0.88	D;D;D
MetaSVM	Uncertain	-0.25	T
MutationAssessor	Uncertain	2.7	M;.;.
MutationTaster	Benign	1.0	D;D;D
PrimateAI	Pathogenic	0.92	D
PROVEAN	Pathogenic	-7.4	D;D;.
REVEL	Uncertain	0.53
Sift	Pathogenic	0.0	D;D;.
Sift4G	Pathogenic	0.0	D;D;D
Polyphen		1.0	D;.;D
Vest4		0.85
MutPred		0.46		Loss of MoRF binding (P = 0.0052);.;.;
MVP		0.80
MPC		2.3
ClinPred		1.0	D
GERP RS		4.8
Varity_R		0.88
gMVP		0.99

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: rs2092189842; hg19: chrX-153069098;