rs911134339

Variant names:

• chr20-34928891-G-A
• rs911134339
• NM_000178.4:c.1362C>T

Variant summary

Our verdict is Benign. The variant received -11 ACMG points: 2P and 13B. PM2 BP4_Strong BP6_Very_Strong BP7

The NM_000178.4(GSS):​c.1362C>T​(p.Ile454Ile) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000062 in 1,613,810 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 0.000026 (0 hom., cov: 31)
  • Exomes 𝑓: 0.0000041 (0 hom.)
• Consequence: GSS NM_000178.4 synonymous
• Clinical Significance: Likely benign criteria provided, multiple submitters, no conflicts B:3
• Conservation: PhyloP100: -5.46
• Publications: 0 publications found

Genes affected

GSS (HGNC:4624): (glutathione synthetase) Glutathione is important for a variety of biological functions, including protection of cells from oxidative damage by free radicals, detoxification of xenobiotics, and membrane transport. The protein encoded by this gene functions as a homodimer to catalyze the second step of glutathione biosynthesis, which is the ATP-dependent conversion of gamma-L-glutamyl-L-cysteine to glutathione. Defects in this gene are a cause of glutathione synthetase deficiency. [provided by RefSeq, Jul 2008]

GSS Gene-Disease associations (from GenCC):

• inherited glutathione synthetase deficiency

  Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
• glutathione synthetase deficiency with 5-oxoprolinuria

  Inheritance: AR Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)

ACMG classification

Our verdict: Benign. The variant received -11 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.56).
• BP6: Variant 20-34928891-G-A is Benign according to our data. Variant chr20-34928891-G-A is described in ClinVar as Likely_benign. ClinVar VariationId is 518006.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BP7: Synonymous conserved (PhyloP=-5.46 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000178.4. 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
	GSS	NM_000178.4	MANE Select	c.1362C>T	p.Ile454Ile	synonymous	Exon 13 of 13	NP_000169.1	P48637-1
	GSS	NM_001322494.1		c.1362C>T	p.Ile454Ile	synonymous	Exon 13 of 13	NP_001309423.1	V9HWJ1
	GSS	NM_001322495.1		c.1362C>T	p.Ile454Ile	synonymous	Exon 13 of 13	NP_001309424.1	P48637-1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	GSS	ENST00000651619.1	MANE Select	c.1362C>T	p.Ile454Ile	synonymous	Exon 13 of 13	ENSP00000498303.1	P48637-1
	GSS	ENST00000451957.2	TSL:1	c.1029C>T	p.Ile343Ile	synonymous	Exon 9 of 9	ENSP00000407517.2	P48637-2
	GSS	ENST00000854976.1		c.1416C>T	p.Ile472Ile	synonymous	Exon 13 of 13	ENSP00000525035.1

Frequencies

GnomAD3 genomes AF: 0.0000263 AC: 4 AN: 152100 Hom.: 0 Cov.: 31

Gnomad AFR AF: 0.0000725

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

GnomAD4 exome AF: 0.00000410 AC: 6 AN: 1461710 Hom.: 0 Cov.: 31 AF XY: 0.00000550 AC XY: 4 AN XY: 727154

African (AFR) AF: 0.00 AC: 0 AN: 33478

American (AMR) AF: 0.00 AC: 0 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

East Asian (EAS) AF: 0.00 AC: 0 AN: 39700

South Asian (SAS) AF: 0.00 AC: 0 AN: 86254

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53420

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5640

European-Non Finnish (NFE) AF: 0.00000270 AC: 3 AN: 1111972

Other (OTH) AF: 0.0000497 AC: 3 AN: 60386

GnomAD4 genome AF: 0.0000263 AC: 4 AN: 152100 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 74310

African (AFR) AF: 0.0000725 AC: 3 AN: 41396

American (AMR) AF: 0.00 AC: 0 AN: 15276

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3468

East Asian (EAS) AF: 0.00 AC: 0 AN: 5196

South Asian (SAS) AF: 0.00 AC: 0 AN: 4820

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10620

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.0000147 AC: 1 AN: 68008

Other (OTH) AF: 0.00 AC: 0 AN: 2092

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.0000113

EpiCase AF: 0.0000545

EpiControl AF: 0.00

ClinVar

ClinVar submissions as Germline

Significance: Likely benign

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
-	-	1	Glutathione synthetase deficiency with 5-oxoprolinuria (1)
-	-	1	Inborn genetic diseases (1)
-	-	1	not specified (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.56
CADD	Benign	3.7
DANN	Benign	0.86
PhyloP100		-5.5

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

Other links and lift over

dbSNP: rs911134339; hg19: chr20-33516694;