rs10493123

Positions:

• chr1-46190800-G-A

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_Strong BP6_Very_Strong BA1

The NM_017739.4(POMGNT1):​c.1540-16C>T variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00406 in 1,603,762 control chromosomes in the GnomAD database, including 176 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

• Frequency:
  • Genomes: 𝑓 0.019 (79 hom., cov: 32)
  • Exomes 𝑓: 0.0025 (97 hom.)
• Consequence: POMGNT1 NM_017739.4 intron
• Clinical Significance: Benign criteria provided, multiple submitters, no conflicts B:6
• Conservation: PhyloP100: 0.259

Genes affected

POMGNT1 (HGNC:19139): (protein O-linked mannose N-acetylglucosaminyltransferase 1 (beta 1,2-)) This gene encodes a type II transmembrane protein that resides in the Golgi apparatus. It participates in O-mannosyl glycosylation and is specific for alpha linked terminal mannose. Mutations in this gene may be associated with muscle-eye-brain disease and several congenital muscular dystrophies. Alternatively spliced transcript variants that encode different protein isoforms have been described. [provided by RefSeq, Feb 2014]

TSPAN1 (HGNC:20657): (tetraspanin 1) The protein encoded by this gene is a member of the transmembrane 4 superfamily, also known as the tetraspanin family. Most of these members are cell-surface proteins that are characterized by the presence of four hydrophobic domains. The proteins mediate signal transduction events that play a role in the regulation of cell development, activation, growth and motility. [provided by RefSeq, Jul 2008]

POMGNT1 (HGNC:):

ACMG classification

Verdict is Benign. Variant got -20 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.75).
• BP6: Variant 1-46190800-G-A is Benign according to our data. Variant chr1-46190800-G-A is described in ClinVar as [Benign]. Clinvar id is 162587.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr1-46190800-G-A is described in Lovd as [Benign].
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.0608 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
POMGNT1	NM_017739.4	c.1540-16C>T		intron_variant		ENST00000371984.8	NP_060209.4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
POMGNT1	ENST00000371984.8	c.1540-16C>T		intron_variant		1	NM_017739.4	ENSP00000361052.3

Frequencies

GnomAD3 genomes AF: 0.0186 AC: 2837 AN: 152152 Hom.: 80 Cov.: 32

Gnomad AFR AF: 0.0628

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00727

Gnomad ASJ AF: 0.0196

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00316

Gnomad NFE AF: 0.000514

Gnomad OTH AF: 0.00956

GnomAD3 exomes AF: 0.00612 AC: 1540 AN: 251468 Hom.: 43 AF XY: 0.00480 AC XY: 653 AN XY: 135904

Gnomad AFR exome AF: 0.0674

Gnomad AMR exome AF: 0.00457

Gnomad ASJ exome AF: 0.0178

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.0000653

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.000677

Gnomad OTH exome AF: 0.00456

GnomAD4 exome AF: 0.00252 AC: 3661 AN: 1451492 Hom.: 97 Cov.: 30 AF XY: 0.00226 AC XY: 1636 AN XY: 722768

Gnomad4 AFR exome AF: 0.0656

Gnomad4 AMR exome AF: 0.00481

Gnomad4 ASJ exome AF: 0.0188

Gnomad4 EAS exome AF: 0.0000252

Gnomad4 SAS exome AF: 0.0000581

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.000319

Gnomad4 OTH exome AF: 0.00641

GnomAD4 genome AF: 0.0187 AC: 2844 AN: 152270 Hom.: 79 Cov.: 32 AF XY: 0.0181 AC XY: 1349 AN XY: 74448

Gnomad4 AFR AF: 0.0628

Gnomad4 AMR AF: 0.00726

Gnomad4 ASJ AF: 0.0196

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.000515

Gnomad4 OTH AF: 0.00946

Alfa AF: 0.0116 Hom.: 15

Bravo AF: 0.0212

Asia WGS AF: 0.00318 AC: 11 AN: 3478

ClinVar

Significance: Benign

Submissions summary: Benign:6

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not specified Benign:3

Benign, no assertion criteria provided	clinical testing	Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center	-	- -
Benign, criteria provided, single submitter	clinical testing	PreventionGenetics, part of Exact Sciences	-	- -
Benign, criteria provided, single submitter	clinical testing	GeneDx	Jun 25, 2014	This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -

not provided Benign:2

Benign, criteria provided, single submitter	not provided	Breakthrough Genomics, Breakthrough Genomics	-	- -
Likely benign, no assertion criteria provided	clinical testing	Laboratory of Diagnostic Genome Analysis, Leiden University Medical Center (LUMC)	-	- -

Muscular dystrophy-dystroglycanopathy (congenital with intellectual disability), type B3;C3150417:Autosomal recessive limb-girdle muscular dystrophy type 2O Benign:1

Benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 31, 2024

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.75
CADD	Benign	5.9
DANN	Benign	0.70

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: rs10493123; hg19: chr1-46656472;