Genetic Variant STT3B:p.Gly47Gly (chr3-31533139-C-T) – ACMG Classification: Benign (-9 pts)

Variant summary

Our verdict is Benign. Variant got -9 ACMG points: 2P and 11B. PM2BP4_ModerateBP6_Very_StrongBP7

The NM_178862.3(STT3B):c.141C>T(p.Gly47Gly) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000196 in 1,295,966 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.0010 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000087 ( 0 hom. )

Consequence

STT3B
NM_178862.3 synonymous

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:3

Conservation

PhyloP100: 0.934

Variant links:

Genes affected

STT3B (HGNC:30611): (STT3 oligosaccharyltransferase complex catalytic subunit B) The protein encoded by this gene is a catalytic subunit of a protein complex that transfers oligosaccharides onto asparagine residues. Defects in this gene are a cause of congenital disorder of glycosylation Ix (CDG1X). [provided by RefSeq, Jun 2014]

STT3B links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -9 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.36).

BP6

Variant 3-31533139-C-T is Benign according to our data. Variant chr3-31533139-C-T is described in ClinVar as [Likely_benign]. Clinvar id is 513479.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BP7

Synonymous conserved (PhyloP=0.934 with no splicing effect.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
STT3B	NM_178862.3 link	c.141C>T	p.Gly47Gly	synonymous_variant	Exon 1 of 16	ENST00000295770.4	NP_849193.1	Q8TCJ2
STT3B	XM_011533465.2 link	c.141C>T	p.Gly47Gly	synonymous_variant	Exon 1 of 10		XP_011531767.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
STT3B	ENST00000295770.4 link	c.141C>T	p.Gly47Gly	synonymous_variant	Exon 1 of 16	1	NM_178862.3	ENSP00000295770.2	Q8TCJ2
STT3B	ENST00000453168.5 link	n.502C>T		non_coding_transcript_exon_variant	Exon 1 of 10	1
STT3B	ENST00000423527.5 link	n.168C>T		non_coding_transcript_exon_variant	Exon 1 of 10	2

Frequencies

GnomAD3 genomes

AF:

0.00102

AC:

154

AN:

151228

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00358

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000659

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00321

Gnomad NFE

AF:

0.0000443

Gnomad OTH

AF:

0.000481

GnomAD3 exomes

AF:

0.000193

AC:

AN:

15558

Hom.:

AF XY:

0.000119

AC XY:

AN XY:

8372

show subpopulations

Gnomad AFR exome

AF:

0.0242

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000874

AC:

100

AN:

1144632

Hom.:

Cov.:

AF XY:

0.0000834

AC XY:

AN XY:

551856

show subpopulations

Gnomad4 AFR exome

AF:

0.00323

Gnomad4 AMR exome

AF:

0.000588

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000838

Gnomad4 OTH exome

AF:

0.000263

GnomAD4 genome

AF:

0.00102

AC:

154

AN:

151334

Hom.:

Cov.:

AF XY:

0.000933

AC XY:

AN XY:

73938

show subpopulations

Gnomad4 AFR

AF:

0.00357

Gnomad4 AMR

AF:

0.0000658

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000443

Gnomad4 OTH

AF:

0.000476

Bravo

AF:

0.00109

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:1

Dec 01, 2017

GeneDx

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -

STT3B-congenital disorder of glycosylation

Benign:1

Nov 02, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

not provided

Benign:1

Jul 01, 2022

CeGaT Center for Human Genetics Tuebingen

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

STT3B: BP4, BP7 -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.36

CADD

Benign

DANN

Uncertain

0.98

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

2.8

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