X-111728197-C-G

Variant names:

• chrX-111728197-C-G
• rs775045681
• NM_001099922.3:c.2260C>G

Variant summary

Our verdict is Likely benign. The variant received -6 ACMG points: 0P and 6B. BP4_Moderate BS2

The NM_001099922.3(ALG13):​c.2260C>G​(p.Pro754Ala) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000456 in 1,097,577 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 3 hemizygotes in GnomAD. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P754S) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 24)
  • Exomes 𝑓: 0.0000046 (0 hom. 3 hem.)
• Consequence: ALG13 NM_001099922.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.67
• Publications: 0 publications found

Genes affected

ALG13 (HGNC:30881): (ALG13 UDP-N-acetylglucosaminyltransferase subunit) The protein encoded by this gene is a subunit of a bipartite UDP-N-acetylglucosamine transferase. It heterodimerizes with asparagine-linked glycosylation 14 homolog to form a functional UDP-GlcNAc glycosyltransferase that catalyzes the second sugar addition of the highly conserved oligosaccharide precursor in endoplasmic reticulum N-linked glycosylation. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Dec 2009]

ALG13 Gene-Disease associations (from GenCC):

• genetic developmental and epileptic encephalopathy

  Inheritance: XL Classification: DEFINITIVE Submitted by: ClinGen
• developmental and epileptic encephalopathy, 36

  Inheritance: XL Classification: STRONG, SUPPORTIVE, LIMITED Submitted by: Orphanet, Labcorp Genetics (formerly Invitae), Ambry Genetics, G2P
• non-syndromic X-linked intellectual disability

  Inheritance: XL Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Likely_benign. The variant received -6 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.102264196).
• BS2: High Hemizygotes in GnomAdExome4 at 3 XL gene

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001099922.3. 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
	ALG13	NM_001099922.3	MANE Select	c.2260C>G	p.Pro754Ala	missense	Exon 19 of 27	NP_001093392.1	Q9NP73-1
	ALG13	NM_001257231.2		c.2026C>G	p.Pro676Ala	missense	Exon 19 of 27	NP_001244160.1	Q9NP73-3
	ALG13	NM_001324292.2		c.2260C>G	p.Pro754Ala	missense	Exon 19 of 26	NP_001311221.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ALG13	ENST00000394780.8	TSL:2 MANE Select	c.2260C>G	p.Pro754Ala	missense	Exon 19 of 27	ENSP00000378260.3	Q9NP73-1
	ALG13	ENST00000927365.1		c.2236C>G	p.Pro746Ala	missense	Exon 19 of 27	ENSP00000597424.1
	ALG13	ENST00000927366.1		c.2086C>G	p.Pro696Ala	missense	Exon 17 of 25	ENSP00000597425.1

Frequencies

GnomAD3 genomes Cov.: 24

GnomAD4 exome AF: 0.00000456 AC: 5 AN: 1097577 Hom.: 0 Cov.: 30 AF XY: 0.00000826 AC XY: 3 AN XY: 363057

African (AFR) AF: 0.00 AC: 0 AN: 26393

American (AMR) AF: 0.00 AC: 0 AN: 35201

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 19371

East Asian (EAS) AF: 0.00 AC: 0 AN: 30189

South Asian (SAS) AF: 0.0000924 AC: 5 AN: 54095

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 40506

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 4085

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 841687

Other (OTH) AF: 0.00 AC: 0 AN: 46050

GnomAD4 genome Cov.: 24

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.074
BayesDel_addAF	Benign	-0.25	T
BayesDel_noAF	Benign	-0.59
CADD	Benign	12
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.62	D
FATHMM_MKL	Benign	0.18	N
LIST_S2	Benign	0.69	T
M_CAP	Uncertain	0.21	D
MetaRNN	Benign	0.10	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Uncertain	2.0	M
PhyloP100		1.7
PrimateAI	Benign	0.29	T
PROVEAN	Uncertain	-2.5	N
REVEL	Benign	0.060
Sift	Benign	0.084	T
Sift4G	Uncertain	0.034	D
Polyphen		0.075	B
Vest4		0.26
MutPred		0.33		Gain of catalytic residue at P754 (P = 0.0357)
MVP		0.40
MPC		0.29
ClinPred		0.53	D
GERP RS		4.0
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.060
gMVP		0.16
Mutation Taster		=95/5	polymorphism

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs775045681; hg19: chrX-110971425;