chr11-62615729-C-T

Position:

chr11-62615729-C-T

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_012200.4(B3GAT3):c.980G>A(p.Arg327Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000049 in 1,613,746 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000053 ( 0 hom. )

Consequence

B3GAT3
NM_012200.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:3

Conservation

PhyloP100: 0.437

Variant links:

Genes affected

B3GAT3 (HGNC:923): (beta-1,3-glucuronyltransferase 3) The protein encoded by this gene is a member of the glucuronyltransferase gene family, enzymes that exhibit strict acceptor specificity, recognizing nonreducing terminal sugars and their anomeric linkages. This gene product catalyzes the formation of the glycosaminoglycan-protein linkage by way of a glucuronyl transfer reaction in the final step of the biosynthesis of the linkage region of proteoglycans. A pseudogene of this gene has been identified on chromosome 3. [provided by RefSeq, Dec 2013]

B3GAT3 links:

B3GAT3 (HGNC:):

B3GAT3 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.03878793).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
B3GAT3	NM_012200.4 linkuse as main transcript	c.980G>A	p.Arg327Gln	missense_variant	5/5	ENST00000265471.10	NP_036332.2	O94766-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	UniProt
B3GAT3	ENST00000265471.10 linkuse as main transcript	c.980G>A	p.Arg327Gln	missense_variant	5/5	1	NM_012200.4	ENSP00000265471.5	O94766-1
B3GAT3	ENST00000532585.5 linkuse as main transcript	n.*1102G>A		non_coding_transcript_exon_variant	6/6	1		ENSP00000432604.1	E9PQ60
B3GAT3	ENST00000532585.5 linkuse as main transcript	n.*1102G>A		3_prime_UTR_variant	6/6	1		ENSP00000432604.1	E9PQ60
B3GAT3	ENST00000531383 linkuse as main transcript	c.*457G>A		3_prime_UTR_variant	5/5	2		ENSP00000431359.1	G3V150

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152246

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000400

AC:

AN:

250072

Hom.:

AF XY:

0.0000295

AC XY:

AN XY:

135402

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000869

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000327

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000442

Gnomad OTH exome

AF:

0.000164

GnomAD4 exome

AF:

0.0000534

AC:

AN:

1461500

Hom.:

Cov.:

AF XY:

0.0000550

AC XY:

AN XY:

727050

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000447

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000464

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000594

Gnomad4 OTH exome

AF:

0.0000497

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152246

Hom.:

Cov.:

AF XY:

0.0000134

AC XY:

AN XY:

74376

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000130

Hom.:

Bravo

AF:

0.0000151

ExAC

AF:

0.0000247

AC:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.000178

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Larsen-like syndrome, B3GAT3 type

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	Baylor Genetics	Apr 14, 2023	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Aug 31, 2022	This sequence change replaces arginine, which is basic and polar, with glutamine, which is neutral and polar, at codon 327 of the B3GAT3 protein (p.Arg327Gln). This variant is present in population databases (rs569989507, gnomAD 0.009%). This variant has not been reported in the literature in individuals affected with B3GAT3-related conditions. ClinVar contains an entry for this variant (Variation ID: 1029180). Algorithms developed to predict the effect of missense changes on protein structure and function output the following: SIFT: "Tolerated"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0". The glutamine amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect 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. -

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

GeneDx

Apr 12, 2021

Not observed at a significant frequency in large population cohorts (Lek et al., 2016); In silico analysis supports that this missense variant does not alter protein structure/function; Has not been previously published as pathogenic or benign to our knowledge -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.076

BayesDel_addAF

Benign

-0.26

BayesDel_noAF

Benign

-0.42

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Benign

0.035

Eigen

Benign

-0.61

Eigen_PC

Benign

-0.50

FATHMM_MKL

Benign

0.30

LIST_S2

Benign

0.78

M_CAP

Benign

0.024

MetaRNN

Benign

0.039

MetaSVM

Benign

-0.90

MutationAssessor

Benign

1.3

PrimateAI

Benign

0.29

PROVEAN

Benign

-0.68

REVEL

Benign

0.073

Sift

Benign

0.39

Sift4G

Benign

0.14

Polyphen

0.0

Vest4

0.054

MutPred

0.26

Loss of MoRF binding (P = 0.0191);

MVP

0.80

MPC

0.35

ClinPred

0.072

GERP RS

2.9

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.29

gMVP

0.20

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over