rs150101415

chr13-52024136-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4 BS1_Supporting

The NM_001004127.3(ALG11):c.406C>T(p.Arg136Cys) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000211 in 1,613,918 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R136H) has been classified as Uncertain significance.

• Frequency:
  • Genomes: 𝑓 0.00022 (0 hom., cov: 32)
  • Exomes 𝑓: 0.00021 (1 hom.)
• Consequence: ALG11 NM_001004127.3 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:5
• Conservation: PhyloP100: 7.52

Genes affected

ALG11 (HGNC:32456): (ALG11 alpha-1,2-mannosyltransferase) This gene encodes a GDP-Man:Man3GlcNAc2-PP-dolichol-alpha1,2-mannosyltransferase which is localized to the cytosolic side of the endoplasmic reticulum (ER) and catalyzes the transfer of the fourth and fifth mannose residue from GDP-mannose (GDP-Man) to Man3GlcNAc2-PP-dolichol and Man4GlcNAc2-PP-dolichol resulting in the production of Man5GlcNAc2-PP-dolichol. Mutations in this gene are associated with congenital disorder of glycosylation type Ip (CDGIP). This gene overlaps but is distinct from the UTP14, U3 small nucleolar ribonucleoprotein, homolog C (yeast) gene. A pseudogene of the GDP-Man:Man3GlcNAc2-PP-dolichol-alpha1,2-mannosyltransferase has been identified on chromosome 19. [provided by RefSeq, Aug 2010]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.4164453).
• BS1: Variant frequency is greater than expected in population sas. gnomad4 allele frequency = 0.000223 (34/152138) while in subpopulation SAS AF= 0.00083 (4/4820). AF 95% confidence interval is 0.000283. There are 0 homozygotes in gnomad4. There are 18 alleles in male gnomad4 subpopulation. This position pass quality control queck. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
ALG11	NM_001004127.3	c.406C>T	p.Arg136Cys	missense_variant	3/4	ENST00000521508.2
ALG11	NR_036571.3	n.66-4183C>T		intron_variant, non_coding_transcript_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ALG11	ENST00000521508.2	c.406C>T	p.Arg136Cys	missense_variant	3/4	1	NM_001004127.3	P4

Frequencies

GnomAD3 genomes AF: 0.000230 AC: 35 AN: 152020 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000262

Gnomad ASJ AF: 0.00173

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000829

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00949

Gnomad NFE AF: 0.000206

Gnomad OTH AF: 0.00192

GnomAD3 exomes AF: 0.000235 AC: 59 AN: 251374 Hom.: 0 AF XY: 0.000228 AC XY: 31 AN XY: 135860

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.000260

Gnomad ASJ exome AF: 0.00129

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.000229

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.000237

Gnomad OTH exome AF: 0.000490

GnomAD4 exome AF: 0.000210 AC: 307 AN: 1461780 Hom.: 1 Cov.: 31 AF XY: 0.000216 AC XY: 157 AN XY: 727190

Gnomad4 AFR exome AF: 0.000149

Gnomad4 AMR exome AF: 0.000358

Gnomad4 ASJ exome AF: 0.00142

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.000243

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.000166

Gnomad4 OTH exome AF: 0.000298

GnomAD4 genome AF: 0.000223 AC: 34 AN: 152138 Hom.: 0 Cov.: 32 AF XY: 0.000242 AC XY: 18 AN XY: 74362

Gnomad4 AFR AF: 0.00

Gnomad4 AMR AF: 0.000262

Gnomad4 ASJ AF: 0.00173

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.000830

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.000206

Gnomad4 OTH AF: 0.00190

Alfa AF: 0.000329 Hom.: 0

Bravo AF: 0.000291

TwinsUK AF: 0.00 AC: 0

ALSPAC AF: 0.000259 AC: 1

ESP6500AA AF: 0.00 AC: 0

ESP6500EA AF: 0.000465 AC: 4

ExAC AF: 0.000222 AC: 27

Asia WGS AF: 0.000289 AC: 1 AN: 3478

EpiCase AF: 0.000327

EpiControl AF: 0.000356

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:5

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

ALG11-congenital disorder of glycosylation Uncertain:4

Uncertain significance, criteria provided, single submitter	clinical testing	Baylor Genetics	Aug 30, 2018	This variant was determined to be of uncertain significance according to ACMG Guidelines, 2015 [PMID:25741868]. -
Uncertain significance, criteria provided, single submitter	clinical testing	Invitae	Sep 27, 2022	This sequence change replaces arginine, which is basic and polar, with cysteine, which is neutral and slightly polar, at codon 136 of the ALG11 protein (p.Arg136Cys). This variant is present in population databases (rs150101415, gnomAD 0.1%). This variant has not been reported in the literature in individuals affected with ALG11-related conditions. ClinVar contains an entry for this variant (Variation ID: 538870). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is expected to disrupt ALG11 protein function. 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. -
Uncertain significance, criteria provided, single submitter	clinical testing	Illumina Laboratory Services, Illumina	Jan 12, 2018	This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. -
Uncertain significance, criteria provided, single submitter	clinical testing	New York Genome Center	Apr 18, 2020	- -

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

GeneDx

Nov 14, 2019

In silico analysis, which includes protein predictors and evolutionary conservation, supports a deleterious effect; Has not been previously published as pathogenic or benign to our knowledge -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.41
BayesDel_addAF	Uncertain	0.15	D
BayesDel_noAF	Pathogenic	0.29
Cadd	Pathogenic	29
Dann	Uncertain	1.0
Eigen	Pathogenic	0.73
Eigen_PC	Pathogenic	0.77
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.90	D;D
M_CAP	Uncertain	0.19	D
MetaRNN	Benign	0.42	T;T
MetaSVM	Uncertain	-0.090	T
MutationTaster	Benign	1.0	D;D
PrimateAI	Uncertain	0.64	T
Polyphen		0.93	.;P
Vest4		0.91
MVP		0.93
MPC		0.098
ClinPred		0.32	T
GERP RS		6.2
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.94
gMVP		0.85

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: rs150101415; hg19: chr13-52598272;