chr11-125593733-T-G

Variant names:

• chr11-125593733-T-G
• rs183072219
• NM_152713.5:c.-36+815T>G

Variant summary

Our verdict is Benign. The variant received -10 ACMG points: 0P and 10B. BP4_Strong BP6_Moderate BS1

The NM_001278503.2(STT3A):​c.-36+8T>G variant causes a splice region, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0019 in 152,340 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Likely benign (★).

• Frequency:
  • Genomes: 𝑓 0.0019 (1 hom., cov: 32)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: STT3A NM_001278503.2 splice_region, intron
• Scores: Splicing: ADA: 0.00003787
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: 0.0130
• Publications: 0 publications found

Genes affected

STT3A (HGNC:6172): (STT3 oligosaccharyltransferase complex catalytic subunit A) The protein encoded by this gene is a catalytic subunit of the N-oligosaccharyltransferase (OST) complex, which functions in the endoplasmic reticulum to transfer glycan chains to asparagine residues of target proteins. A separate complex containing a similar catalytic subunit with an overlapping function also exists. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Aug 2015]

STT3A Gene-Disease associations (from GenCC):

• congenital disorder of glycosylation, type Iw, autosomal dominant

  Inheritance: AD Classification: DEFINITIVE, STRONG, MODERATE Submitted by: Labcorp Genetics (formerly Invitae), ClinGen, Ambry Genetics, G2P
• STT3A-congenital disorder of glycosylation

  Inheritance: AR Classification: STRONG, MODERATE, SUPPORTIVE, LIMITED Submitted by: ClinGen, G2P, Orphanet, Ambry Genetics, Labcorp Genetics (formerly Invitae)

ACMG classification

Our verdict: Benign. The variant received -10 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.81).
• BP6: Variant 11-125593733-T-G is Benign according to our data. Variant chr11-125593733-T-G is described in ClinVar as Likely_benign. ClinVar VariationId is 385431.Status of the report is criteria_provided_single_submitter, 1 stars.
• BS1: Variant frequency is greater than expected in population amr. GnomAd4 allele frequency = 0.0019 (290/152340) while in subpopulation AMR AF = 0.00418 (64/15304). AF 95% confidence interval is 0.00336. There are 1 homozygotes in GnomAd4. There are 150 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001278503.2. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	STT3A	NM_152713.5	MANE Select	c.-36+815T>G		intron	N/A	NP_689926.1	P46977-1
	STT3A	NM_001278503.2		c.-36+8T>G		splice_region intron	N/A	NP_001265432.1	P46977-1
	STT3A	NM_001278504.2		c.-189+815T>G		intron	N/A	NP_001265433.1	P46977-2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	STT3A	ENST00000392708.9	TSL:1 MANE Select	c.-36+815T>G		intron	N/A	ENSP00000376472.3	P46977-1
	STT3A	ENST00000529196.5	TSL:1	c.-36+8T>G		splice_region intron	N/A	ENSP00000436962.1	P46977-1
	STT3A	ENST00000534472.5	TSL:1	n.100+815T>G		intron	N/A

Frequencies

GnomAD3 genomes AF: 0.00191 AC: 290 AN: 152222 Hom.: 1 Cov.: 32

Gnomad AFR AF: 0.000386

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00419

Gnomad ASJ AF: 0.0115

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000207

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00316

Gnomad NFE AF: 0.00238

Gnomad OTH AF: 0.00287

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 2 Hom.: 0 Cov.: 0 AF XY: 0.00 AC XY: 0 AN XY: 2

African (AFR) AC: 0 AN: 0

American (AMR) AC: 0 AN: 0

Ashkenazi Jewish (ASJ) AC: 0 AN: 0

East Asian (EAS) AC: 0 AN: 0

South Asian (SAS) AC: 0 AN: 0

European-Finnish (FIN) AC: 0 AN: 0

Middle Eastern (MID) AC: 0 AN: 0

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 2

Other (OTH) AC: 0 AN: 0

GnomAD4 genome AF: 0.00190 AC: 290 AN: 152340 Hom.: 1 Cov.: 32 AF XY: 0.00201 AC XY: 150 AN XY: 74500

African (AFR) AF: 0.000385 AC: 16 AN: 41574

American (AMR) AF: 0.00418 AC: 64 AN: 15304

Ashkenazi Jewish (ASJ) AF: 0.0115 AC: 40 AN: 3468

East Asian (EAS) AF: 0.00 AC: 0 AN: 5184

South Asian (SAS) AF: 0.000207 AC: 1 AN: 4832

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10624

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

European-Non Finnish (NFE) AF: 0.00238 AC: 162 AN: 68032

Other (OTH) AF: 0.00284 AC: 6 AN: 2116

Alfa AF: 0.00194 Hom.: 0

Bravo AF: 0.00181

Asia WGS AF: 0.000289 AC: 1 AN: 3478

ClinVar

ClinVar submissions as Germline

Significance: Likely benign

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	-	1	not provided (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.81
CADD	Benign	6.3
DANN	Benign	0.74
PhyloP100		0.013

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Benign	0.000038
dbscSNV1_RF	Benign	0.0060
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

Other links and lift over

dbSNP: rs183072219; hg19: chr11-125463628;