X-71537843-G-A

Variant names:

• chrX-71537843-G-A
• NM_181672.3:c.233G>A

Variant summary

Our verdict is Uncertain significance. The variant received 3 ACMG points: 3P and 0B. PM2 PP2

The NM_181672.3(OGT):​c.233G>A​(p.Ser78Asn) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 23)
• Consequence: OGT NM_181672.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 9.62
• Publications: 0 publications found

Genes affected

OGT (HGNC:8127): (O-linked N-acetylglucosamine (GlcNAc) transferase) This gene encodes a glycosyltransferase that catalyzes the addition of a single N-acetylglucosamine in O-glycosidic linkage to serine or threonine residues. Since both phosphorylation and glycosylation compete for similar serine or threonine residues, the two processes may compete for sites, or they may alter the substrate specificity of nearby sites by steric or electrostatic effects. The protein contains multiple tetratricopeptide repeats that are required for optimal recognition of substrates. Alternatively spliced transcript variants encoding distinct isoforms have been found for this gene. [provided by RefSeq, Oct 2009]

OGT Gene-Disease associations (from GenCC):

• intellectual disability, X-linked 106

  Inheritance: XL Classification: STRONG, MODERATE Submitted by: G2P, Illumina, ClinGen, Labcorp Genetics (formerly Invitae)

ACMG classification

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

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in the gene, where a lot of missense mutations are associated with disease in ClinVar. The gene has 12 curated pathogenic missense variants (we use a threshold of 10). The gene has 3 curated benign missense variants. Gene score misZ: 5.6667 (above the threshold of 3.09). Trascript score misZ: NaN (below the threshold of 3.09). GenCC associations: The gene is linked to intellectual disability, X-linked 106.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_181672.3. 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
	OGT	NM_181672.3	MANE Select	c.233G>A	p.Ser78Asn	missense	Exon 3 of 22	NP_858058.1	O15294-1
	OGT	NM_181673.3		c.203G>A	p.Ser68Asn	missense	Exon 3 of 22	NP_858059.1	O15294-3

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	OGT	ENST00000373719.8	TSL:1 MANE Select	c.233G>A	p.Ser78Asn	missense	Exon 3 of 22	ENSP00000362824.3	O15294-1
	OGT	ENST00000373701.7	TSL:1	c.203G>A	p.Ser68Asn	missense	Exon 3 of 22	ENSP00000362805.3	O15294-3
	OGT	ENST00000925317.1		c.233G>A	p.Ser78Asn	missense	Exon 3 of 22	ENSP00000595376.1

Frequencies

GnomAD3 genomes Cov.: 23

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 23

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	Inborn genetic diseases (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.99
BayesDel_addAF	Benign	-0.045	T
BayesDel_noAF	Benign	-0.30
CADD	Uncertain	26
DANN	Benign	0.77
DEOGEN2	Benign	0.18	T
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Benign	0.84	T
M_CAP	Uncertain	0.16	D
MetaRNN	Uncertain	0.54	D
MetaSVM	Benign	-0.75	T
MutationAssessor	Benign	1.5	L
PhyloP100		9.6
PrimateAI	Pathogenic	0.92	D
PROVEAN	Benign	-0.32	N
REVEL	Benign	0.27
Sift	Benign	0.79	T
Sift4G	Benign	0.79	T
Polyphen		0.67	P
Vest4		0.66
MutPred		0.54		Loss of glycosylation at S78 (P = 0.0692)
MVP		0.77
MPC		1.5
ClinPred		0.95	D
GERP RS		4.9
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.60
gMVP		0.97
Mutation Taster		=13/87	disease causing

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.13		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

hg19: chrX-70757693;