rs12695382

Positions:

• chr3-119229324-A-G

Variant summary

Our verdict is Benign. Variant got -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_003778.4(B4GALT4):​c.253+523T>C variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.108 in 152,276 control chromosomes in the GnomAD database, including 1,025 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 0.11 (1025 hom., cov: 33)
• Consequence: B4GALT4 NM_003778.4 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.724

Genes affected

B4GALT4 (HGNC:927): (beta-1,4-galactosyltransferase 4) This gene is one of seven beta-1,4-galactosyltransferase (beta4GalT) genes. They encode type II membrane-bound glycoproteins that appear to have exclusive specificity for the donor substrate UDP-galactose; all transfer galactose in a beta1,4 linkage to similar acceptor sugars: GlcNAc, Glc, and Xyl. Each beta4GalT has a distinct function in the biosynthesis of different glycoconjugates and saccharide structures. As type II membrane proteins, they have an N-terminal hydrophobic signal sequence that directs the protein to the Golgi apparatus and which then remains uncleaved to function as a transmembrane anchor. By sequence similarity, the beta4GalTs form four groups: beta4GalT1 and beta4GalT2, beta4GalT3 and beta4GalT4, beta4GalT5 and beta4GalT6, and beta4GalT7. The enzyme encoded by this gene appears to mainly play a role in glycolipid biosynthesis. Two alternatively spliced transcript variants have been found for this gene. [provided by RefSeq, Jul 2008]

B4GALT4-AS1 (HGNC:40090): (B4GALT4 antisense RNA 1)

ACMG classification

Verdict is Benign. Variant got -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.97).
• BA1: GnomAd4 highest subpopulation (EAS) allele frequency at 95% confidence interval = 0.23 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
B4GALT4	NM_003778.4	c.253+523T>C		intron_variant		ENST00000393765.7	NP_003769.1
B4GALT4-AS1	NR_046574.1	n.197-821A>G		intron_variant, non_coding_transcript_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
B4GALT4	ENST00000393765.7	c.253+523T>C		intron_variant		1	NM_003778.4	ENSP00000377360	P1
B4GALT4-AS1	ENST00000470790.1	n.197-821A>G		intron_variant, non_coding_transcript_variant		5

Frequencies

GnomAD3 genomes AF: 0.108 AC: 16500 AN: 152156 Hom.: 1021 Cov.: 33

Gnomad AFR AF: 0.0606

Gnomad AMI AF: 0.0702

Gnomad AMR AF: 0.0930

Gnomad ASJ AF: 0.0943

Gnomad EAS AF: 0.241

Gnomad SAS AF: 0.131

Gnomad FIN AF: 0.0940

Gnomad MID AF: 0.0823

Gnomad NFE AF: 0.133

Gnomad OTH AF: 0.0937

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

GnomAD4 genome AF: 0.108 AC: 16511 AN: 152276 Hom.: 1025 Cov.: 33 AF XY: 0.108 AC XY: 8020 AN XY: 74440

Gnomad4 AFR AF: 0.0605

Gnomad4 AMR AF: 0.0929

Gnomad4 ASJ AF: 0.0943

Gnomad4 EAS AF: 0.241

Gnomad4 SAS AF: 0.131

Gnomad4 FIN AF: 0.0940

Gnomad4 NFE AF: 0.133

Gnomad4 OTH AF: 0.0979

Alfa AF: 0.116 Hom.: 193

Bravo AF: 0.105

Asia WGS AF: 0.173 AC: 600 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.97
CADD	Benign	9.3
DANN	Benign	0.29

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: rs12695382; hg19: chr3-118948171;