X-129806444-T-C

Variant names:

• chrX-129806444-T-C
• rs1007850381
• NM_016032.4:c.1021A>G

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_016032.4(ZDHHC9):​c.1021A>G​(p.Ser341Gly) 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 benign outcome for this variant. 14/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 23)
• Consequence: ZDHHC9 NM_016032.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.306

Genes affected

ZDHHC9 (HGNC:18475): (zinc finger DHHC-type palmitoyltransferase 9) This gene encodes an integral membrane protein that is a member of the zinc finger DHHC domain-containing protein family. The encoded protein forms a complex with golgin subfamily A member 7 and functions as a palmitoyltransferase. This protein specifically palmitoylates HRAS and NRAS. Mutations in this gene are associated with X-linked cognitive disability. Alternate splicing results in multiple transcript variants that encode the same protein.[provided by RefSeq, May 2010]

ACMG classification

Verdict is Likely_benign. Variant got -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.052274585).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ZDHHC9	NM_016032.4	c.1021A>G	p.Ser341Gly	missense_variant	Exon 11 of 11	ENST00000357166.11	NP_057116.2
ZDHHC9	NM_001008222.3	c.1021A>G	p.Ser341Gly	missense_variant	Exon 10 of 10		NP_001008223.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ZDHHC9	ENST00000357166.11	c.1021A>G	p.Ser341Gly	missense_variant	Exon 11 of 11	1	NM_016032.4	ENSP00000349689.6
ZDHHC9	ENST00000371064.7	c.1021A>G	p.Ser341Gly	missense_variant	Exon 10 of 10	1		ENSP00000360103.3

Frequencies

GnomAD3 genomes Cov.: 23

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 23

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Syndromic X-linked intellectual disability Raymond type Uncertain:1

May 21, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces serine, which is neutral and polar, with glycine, which is neutral and non-polar, at codon 341 of the ZDHHC9 protein (p.Ser341Gly). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with ZDHHC9-related conditions. Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be tolerated. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.071
BayesDel_addAF	Benign	-0.41	T
BayesDel_noAF	Benign	-0.83
CADD	Benign	13
DANN	Benign	0.93
DEOGEN2	Benign	0.020	T;T
FATHMM_MKL	Benign	0.49	N
LIST_S2	Benign	0.61	.;T
M_CAP	Benign	0.0071	T
MetaRNN	Benign	0.052	T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	1.2	L;L
PrimateAI	Benign	0.31	T
PROVEAN	Benign	0.34	N;N
REVEL	Benign	0.017
Sift	Benign	0.085	T;T
Sift4G	Benign	0.17	T;T
Polyphen		0.0	B;B
Vest4		0.080
MutPred		0.17		Loss of phosphorylation at S341 (P = 0.0024);Loss of phosphorylation at S341 (P = 0.0024);
MVP		0.093
MPC		1.0
ClinPred		0.063	T
GERP RS		1.8
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.059
gMVP		0.11

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: rs1007850381; hg19: chrX-128940420;