Genetic Variant NM_173791.5:c.2600C>T (chr10-117284133-G-A) – ACMG Classification: Uncertain_significance (3 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 3 ACMG points: 3P and 0B. PM2PP3

The NM_173791.5(PDZD8):c.2600C>T(p.Ser867Phe) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000205 in 1,461,886 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000021 ( 0 hom. )

Consequence

PDZD8
NM_173791.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 10.0

Publications

0 publications found

Variant links:

Genes affected

PDZD8 (HGNC:26974): (PDZ domain containing 8) Predicted to enable lipid binding activity and metal ion binding activity. Involved in several processes, including mitochondrial calcium ion homeostasis; mitochondrion-endoplasmic reticulum membrane tethering; and regulation of cell morphogenesis. Located in endoplasmic reticulum membrane and mitochondria-associated endoplasmic reticulum membrane. [provided by Alliance of Genome Resources, Apr 2022]

PDZD8 Gene-Disease associations (from GenCC):

intellectual developmental disorder with autism and dysmorphic facies
Inheritance: AR Classification: LIMITED Submitted by: Ambry Genetics

PDZD8 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 3 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.758

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PDZD8	NM_173791.5 link	c.2600C>T	p.Ser867Phe	missense_variant	Exon 5 of 5	ENST00000334464.7	NP_776152.1	Q8NEN9
PDZD8	XM_005269518.5 link	c.2477C>T	p.Ser826Phe	missense_variant	Exon 4 of 4		XP_005269575.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PDZD8	ENST00000334464.7 link	c.2600C>T	p.Ser867Phe	missense_variant	Exon 5 of 5	1	NM_173791.5	ENSP00000334642.5		Q8NEN9
PDZD8	ENST00000482496.5 link	n.*174C>T		downstream_gene_variant		2

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000205

AC:

AN:

1461886

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

727244

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33480

American (AMR)

AF:

0.00

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.00

AC:

AN:

86254

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53420

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.00000270

AC:

AN:

1112008

Other (OTH)

AF:

0.00

AC:

AN:

60396

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.492

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Sep 30, 2024

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.2600C>T (p.S867F) alteration is located in exon 5 (coding exon 5) of the PDZD8 gene. This alteration results from a C to T substitution at nucleotide position 2600, causing the serine (S) at amino acid position 867 to be replaced by a phenylalanine (F). 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

0.92

BayesDel_addAF

Pathogenic

0.35

BayesDel_noAF

Pathogenic

0.27

CADD

Pathogenic

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.32

Eigen

Uncertain

0.46

Eigen_PC

Uncertain

0.57

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Uncertain

0.96

M_CAP

Benign

0.054

MetaRNN

Pathogenic

0.76

MetaSVM

Uncertain

0.19

MutationAssessor

Benign

-0.20

PhyloP100

PrimateAI

Uncertain

0.76

PROVEAN

Benign

-1.4

REVEL

Pathogenic

0.70

Sift

Benign

0.14

Sift4G

Pathogenic

0.0

Polyphen

1.0

Vest4

0.80

MutPred

0.59

Gain of sheet (P = 0.0266);

MVP

0.75

MPC

0.83

ClinPred

0.95

GERP RS

5.5

Varity_R

0.23

gMVP

0.69

Mutation Taster

=50/50

(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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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over