NM_020981.4:c.-410+10071T>C

Variant names:

• chr2-167500348-T-C
• rs979974
• NM_020981.4:c.-410+10071T>C

Variant summary

Our verdict is Benign. The variant received -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_020981.4(B3GALT1):​c.-410+10071T>C variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0472 in 152,262 control chromosomes in the GnomAD database, including 566 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: 𝑓 0.047 (566 hom., cov: 32)
• Consequence: B3GALT1 NM_020981.4 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.604
• Publications: 1 publications found

Genes affected

B3GALT1 (HGNC:916): (beta-1,3-galactosyltransferase 1) This gene is a member of the beta-1,3-galactosyltransferase (beta3GalT) gene family. This family encodes type II membrane-bound glycoproteins with diverse enzymatic functions using different donor substrates (UDP-galactose and UDP-N-acetylglucosamine) and different acceptor sugars (N-acetylglucosamine, galactose, N-acetylgalactosamine). The beta3GalT genes are distantly related to the Drosophila Brainiac gene and have the protein coding sequence contained in a single exon. The beta3GalT proteins also contain conserved sequences not found in the beta4GalT or alpha3GalT proteins. The carbohydrate chains synthesized by these enzymes are designated as type 1, whereas beta4GalT enzymes synthesize type 2 carbohydrate chains. The ratio of type 1:type 2 chains changes during embryogenesis. By sequence similarity, the beta3GalT genes fall into at least two groups: beta3GalT4 and 4 other beta3GalT genes (beta3GalT1-3, beta3GalT5). This gene is expressed exclusively in the brain. The encoded protein shows strict donor substrate specificity for UDP-galactose. [provided by RefSeq, Jul 2008]

ENSG00000228222 (HGNC:):

ACMG classification

Our verdict: Benign. The variant received -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.8).
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.161 is higher than 0.05.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_020981.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	B3GALT1	NM_020981.4	MANE Select	c.-410+10071T>C		intron	N/A	NP_066191.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	B3GALT1	ENST00000392690.4	TSL:6 MANE Select	c.-410+10071T>C		intron	N/A	ENSP00000376456.2
	ENSG00000228222	ENST00000442316.1	TSL:3	n.265+10071T>C		intron	N/A

Frequencies

GnomAD3 genomes AF: 0.0471 AC: 7162 AN: 152144 Hom.: 558 Cov.: 32

Gnomad AFR AF: 0.164

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0170

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000414

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00316

Gnomad NFE AF: 0.000617

Gnomad OTH AF: 0.0345

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.0472 AC: 7194 AN: 152262 Hom.: 566 Cov.: 32 AF XY: 0.0451 AC XY: 3361 AN XY: 74456

African (AFR) AF: 0.164 AC: 6818 AN: 41546

American (AMR) AF: 0.0170 AC: 259 AN: 15278

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3472

East Asian (EAS) AF: 0.00 AC: 0 AN: 5176

South Asian (SAS) AF: 0.000414 AC: 2 AN: 4830

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10628

Middle Eastern (MID) AF: 0.00340 AC: 1 AN: 294

European-Non Finnish (NFE) AF: 0.000618 AC: 42 AN: 68016

Other (OTH) AF: 0.0341 AC: 72 AN: 2110

Alfa AF: 0.0163 Hom.: 19

Bravo AF: 0.0539

Asia WGS AF: 0.00982 AC: 35 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.80
CADD	Benign	1.0
DANN	Benign	0.88
PhyloP100		-0.60

Splicing

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

Other links and lift over

dbSNP: rs979974; hg19: chr2-168356858;