chr11-62616594-G-T

Variant names:

Variant summary

Our verdict is Benign. The variant received -19 ACMG points: 1P and 20B. PP2BP4_StrongBP6_Very_StrongBS1BS2

The NM_012200.4(B3GAT3):c.821C>A(p.Thr274Asn) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000914 in 1,614,236 control chromosomes in the GnomAD database, including 16 homozygotes. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★). Synonymous variant affecting the same amino acid position (i.e. T274T) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.0052 ( 9 hom., cov: 32)

Exomes 𝑓: 0.00047 ( 7 hom. )

Consequence

B3GAT3
NM_012200.4 missense

Scores

Clinical Significance

Benign criteria provided, multiple submitters, no conflicts B:5

Conservation

PhyloP100: 1.32

Publications

0 publications found

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 Gene-Disease associations (from GenCC):

Larsen-like syndrome, B3GAT3 type
Inheritance: AR Classification: STRONG, MODERATE, SUPPORTIVE, LIMITED Submitted by: G2P, Ambry Genetics, Labcorp Genetics (formerly Invitae), Orphanet, PanelApp Australia
complex neurodevelopmental disorder
Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics

B3GAT3 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -19 ACMG points.

PP2

Missense variant in the gene, where a lot of missense mutations are associated with disease in ClinVar. The gene has 8 curated pathogenic missense variants (we use a threshold of 10). The gene has 2 curated benign missense variants. Gene score misZ: 0.69161 (below the threshold of 3.09). Trascript score misZ: 1.8273 (below the threshold of 3.09). GenCC associations: The gene is linked to Larsen-like syndrome, B3GAT3 type, complex neurodevelopmental disorder.

BP4

Computational evidence support a benign effect (MetaRNN=0.004331887).

BP6

Variant 11-62616594-G-T is Benign according to our data. Variant chr11-62616594-G-T is described in ClinVar as Benign. ClinVar VariationId is 544155.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.00515 (785/152342) while in subpopulation AFR AF = 0.0181 (752/41574). AF 95% confidence interval is 0.017. There are 9 homozygotes in GnomAd4. There are 342 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

BS2

High Homozygotes in GnomAd4 at 9 AR,AD gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
B3GAT3	NM_012200.4 link	c.821C>A	p.Thr274Asn	missense_variant	Exon 4 of 5	ENST00000265471.10	NP_036332.2	O94766-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
B3GAT3	ENST00000265471.10 link	c.821C>A	p.Thr274Asn	missense_variant	Exon 4 of 5	1	NM_012200.4	ENSP00000265471.5		O94766-1

Frequencies

GnomAD3 genomes

AF:

0.00513

AC:

781

AN:

152224

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0180

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00177

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00633

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00191

GnomAD2 exomes

AF:

0.00134

AC:

338

AN:

251316

AF XY:

0.000787

show subpopulations

Gnomad AFR exome

AF:

0.0188

Gnomad AMR exome

AF:

0.000694

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000544

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000880

Gnomad OTH exome

AF:

0.000815

GnomAD4 exome

AF:

0.000472

AC:

690

AN:

1461894

Hom.:

Cov.:

AF XY:

0.000382

AC XY:

278

AN XY:

727248

show subpopulations

African (AFR)

AF:

0.0170

AC:

568

AN:

33480

American (AMR)

AF:

0.000715

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.0000252

AC:

AN:

39700

South Asian (SAS)

AF:

0.0000812

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53420

Middle Eastern (MID)

AF:

0.000347

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.00000719

AC:

AN:

1112012

Other (OTH)

AF:

0.00119

AC:

AN:

60396

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.485

Heterozygous variant carriers

146

194

243

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

110

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.00515

AC:

785

AN:

152342

Hom.:

Cov.:

AF XY:

0.00459

AC XY:

342

AN XY:

74494

show subpopulations

African (AFR)

AF:

0.0181

AC:

752

AN:

41574

American (AMR)

AF:

0.00177

AC:

AN:

15294

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3466

East Asian (EAS)

AF:

0.00

AC:

AN:

5188

South Asian (SAS)

AF:

0.00

AC:

AN:

4834

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10630

Middle Eastern (MID)

AF:

0.00680

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

68034

Other (OTH)

AF:

0.00189

AC:

AN:

2116

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.499

Heterozygous variant carriers

116

154

193

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.00103

Hom.:

Bravo

AF:

0.00578

ESP6500AA

AF:

0.0204

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.00171

AC:

208

Asia WGS

AF:

0.00115

AC:

AN:

3478

ClinVar

Significance: Benign

Submissions summary: Benign:5

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:3

Breakthrough Genomics, Breakthrough Genomics

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:not provided

- -

Laboratory of Diagnostic Genome Analysis, Leiden University Medical Center (LUMC)

Significance:Likely benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Nov 27, 2020

GeneDx

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

not specified

Benign:1

Genome Diagnostics Laboratory, Amsterdam University Medical Center

Significance:Benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Larsen-like syndrome, B3GAT3 type

Benign:1

Jan 28, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.099

BayesDel_addAF

Benign

-0.59

BayesDel_noAF

Benign

-0.60

CADD

Benign

(source)

DANN

Benign

0.92

DEOGEN2

Benign

0.057

T;.;.

Eigen

Benign

-0.69

Eigen_PC

Benign

-0.57

FATHMM_MKL

Benign

0.12

LIST_S2

Benign

0.83

T;T;T

MetaRNN

Benign

0.0043

T;T;T

MetaSVM

Benign

-1.1

MutationAssessor

Benign

1.2

L;.;L

PhyloP100

1.3

PrimateAI

Benign

0.38

PROVEAN

Benign

0.90

N;N;N

REVEL

Benign

0.074

Sift

Benign

0.35

T;T;T

Sift4G

Benign

0.47

T;T;T

Polyphen

0.0

B;.;.

Vest4

0.20

MVP

0.54

MPC

0.35

ClinPred

0.0026

GERP RS

3.4

Varity_R

0.16

gMVP

0.46

Mutation Taster

=100/0

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.020

Details are displayed if max score is > 0.2

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

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over