X-129810983-A-C

Variant names:

• chrX-129810983-A-C
• NM_016032.4:c.900T>G
• ZDHHC9 p.Gly300Gly

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 2P and 5B. PM2 BP4_Strong BP7

The NM_016032.4(ZDHHC9):​c.900T>G​(p.Gly300Gly) variant causes a synonymous 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. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. G300G) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 22)
• Consequence: ZDHHC9 NM_016032.4 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 3.11
• Publications: 0 publications found

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]

ZDHHC9 Gene-Disease associations (from GenCC):

• syndromic X-linked intellectual disability Raymond type

  Inheritance: XL Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P, ClinGen
• X-linked intellectual disability with marfanoid habitus

  Inheritance: XL Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Likely_benign. The variant received -3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.52).
• BP7: Synonymous conserved (PhyloP=3.11 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_016032.4. 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
	ZDHHC9	NM_016032.4	MANE Select	c.900T>G	p.Gly300Gly	synonymous	Exon 10 of 11	NP_057116.2	Q9Y397
	ZDHHC9	NM_001008222.3		c.900T>G	p.Gly300Gly	synonymous	Exon 9 of 10	NP_001008223.1	Q9Y397

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ZDHHC9	ENST00000357166.11	TSL:1 MANE Select	c.900T>G	p.Gly300Gly	synonymous	Exon 10 of 11	ENSP00000349689.6	Q9Y397
	ZDHHC9	ENST00000371064.7	TSL:1	c.900T>G	p.Gly300Gly	synonymous	Exon 9 of 10	ENSP00000360103.3	Q9Y397
	ZDHHC9	ENST00000860167.1		c.990T>G	p.Gly330Gly	synonymous	Exon 11 of 12	ENSP00000530226.1

Frequencies

GnomAD3 genomes Cov.: 22

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 22

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.52
CADD	Benign	12
DANN	Benign	0.74
PhyloP100		3.1

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

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Other links and lift over

hg19: chrX-128944959;