1-235465675-C-T

Variant names:

• chr1-235465675-C-T
• rs367543074
• NM_152490.5:c.802G>A

Variant summary

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

The NM_152490.5(B3GALNT2):​c.802G>A​(p.Val268Met) variant causes a missense change. The variant allele was found at a frequency of 0.00000889 in 1,461,806 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000089 (0 hom.)
• Consequence: B3GALNT2 NM_152490.5 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts P:2 U:2 O:1
• Conservation: PhyloP100: 3.79
• Publications: 5 publications found

Genes affected

B3GALNT2 (HGNC:28596): (beta-1,3-N-acetylgalactosaminyltransferase 2) This gene encodes a member of the glycosyltransferase 31 family. The encoded protein synthesizes GalNAc:beta-1,3GlcNAc, a novel carbohydrate structure, on N- and O-glycans. Alternatively spliced transcript variants that encode different isoforms have been described. [provided by RefSeq, Mar 2013]

B3GALNT2 Gene-Disease associations (from GenCC):

• muscular dystrophy-dystroglycanopathy (congenital with brain and eye anomalies), type a, 11

  Inheritance: AR Classification: DEFINITIVE, STRONG, MODERATE Submitted by: G2P, Labcorp Genetics (formerly Invitae), Genomics England PanelApp, Ambry Genetics
• autosomal recessive non-syndromic intellectual disability

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• muscle-eye-brain disease

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• muscular dystrophy-dystroglycanopathy, type A

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• intellectual disability

  Inheritance: AR Classification: LIMITED Submitted by: Ambry Genetics

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_152490.5. 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
	B3GALNT2	NM_152490.5	MANE Select	c.802G>A	p.Val268Met	missense	Exon 7 of 12	NP_689703.1	Q8NCR0-1
	B3GALNT2	NM_001277155.3		c.925G>A	p.Val309Met	missense	Exon 8 of 8	NP_001264084.1	Q8NCR0-2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	B3GALNT2	ENST00000366600.8	TSL:1 MANE Select	c.802G>A	p.Val268Met	missense	Exon 7 of 12	ENSP00000355559.3	Q8NCR0-1
	B3GALNT2	ENST00000313984.3	TSL:1	c.925G>A	p.Val309Met	missense	Exon 8 of 8	ENSP00000315678.3	Q8NCR0-2
	B3GALNT2	ENST00000954792.1		c.925G>A	p.Val309Met	missense	Exon 8 of 13	ENSP00000624851.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD2 exomes AF: 0.0000119 AC: 3 AN: 251378 AF XY: 0.00

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000176

Gnomad OTH exome AF: 0.000163

GnomAD4 exome AF: 0.00000889 AC: 13 AN: 1461806 Hom.: 0 Cov.: 31 AF XY: 0.00000688 AC XY: 5 AN XY: 727206

African (AFR) AF: 0.00 AC: 0 AN: 33478

American (AMR) AF: 0.00 AC: 0 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26132

East Asian (EAS) AF: 0.00 AC: 0 AN: 39680

South Asian (SAS) AF: 0.00 AC: 0 AN: 86254

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53414

Middle Eastern (MID) AF: 0.00121 AC: 7 AN: 5766

European-Non Finnish (NFE) AF: 0.00000450 AC: 5 AN: 1111966

Other (OTH) AF: 0.0000166 AC: 1 AN: 60392

GnomAD4 genome Cov.: 32

Alfa AF: 0.0000466 Hom.: 0

Bravo AF: 0.00000378

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
2	1	-	Muscular dystrophy-dystroglycanopathy (congenital with brain and eye anomalies), type a, 11 (3)
-	1	-	not provided (2)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.090
PhyloP100		3.8
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.11
gMVP		0.69
Mutation Taster		=9/91	disease causing

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.30		Details are displayed if max score is > 0.2
DS_DL_spliceai		0.30		Position offset: -39

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

dbSNP: rs367543074; hg19: chr1-235628992;