rs672601307

Variant names:

• chr15-50490443-T-C
• rs672601307
• NM_005154.5:c.2152T>C

Variant summary

Our verdict is Uncertain significance. The variant received 5 ACMG points: 5P and 0B. PM2 PM5 PP5

The NM_005154.5(USP8):​c.2152T>C​(p.Ser718Pro) variant causes a missense change. The variant allele was found at a frequency of 0.000000684 in 1,461,890 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Pathogenic (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. S718C) has been classified as Pathogenic.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: USP8 NM_005154.5 missense
• Clinical Significance: Pathogenic no assertion criteria provided P:2
• Conservation: PhyloP100: 5.95
• Publications: 29 publications found

Genes affected

USP8 (HGNC:12631): (ubiquitin specific peptidase 8) This gene encodes a protein that belongs to the ubiquitin-specific processing protease family of proteins. The encoded protein is thought to regulate the morphology of the endosome by ubiquitination of proteins on this organelle and is involved in cargo sorting and membrane trafficking at the early endosome stage. This protein is required for the cell to enter the S phase of the cell cycle and also functions as a positive regulator in the Hedgehog signaling pathway in development. Pseudogenes of this gene are present on chromosomes 2 and 6. Alternate splicing results in multiple transcript variants. [provided by RefSeq, Sep 2013]

USP8 Gene-Disease associations (from GenCC):

• autosomal recessive spastic paraplegia type 59

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• complex neurodevelopmental disorder

  Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics
• genetic developmental and epileptic encephalopathy

  Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics
• hereditary spastic paraplegia

  Inheritance: AR Classification: LIMITED Submitted by: Ambry Genetics

ACMG classification

Our verdict: Uncertain_significance. The variant received 5 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr15-50490444-C-G is described in ClinVar as Pathogenic. ClinVar VariationId is 161993.Status of the report is no_assertion_criteria_provided, 0 stars.
• PP5: Variant 15-50490443-T-C is Pathogenic according to our data. Variant chr15-50490443-T-C is described in ClinVar as Pathogenic. ClinVar VariationId is 161992.Status of the report is no_assertion_criteria_provided, 0 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_005154.5. 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
	USP8	NM_005154.5	MANE Select	c.2152T>C	p.Ser718Pro	missense	Exon 14 of 20	NP_005145.3
	USP8	NM_001128610.3		c.2152T>C	p.Ser718Pro	missense	Exon 14 of 20	NP_001122082.1	P40818-1
	USP8	NM_001283049.2		c.1834T>C	p.Ser612Pro	missense	Exon 11 of 17	NP_001269978.1	P40818-2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	USP8	ENST00000307179.9	TSL:1 MANE Select	c.2152T>C	p.Ser718Pro	missense	Exon 14 of 20	ENSP00000302239.4	P40818-1
	USP8	ENST00000396444.7	TSL:1	c.2152T>C	p.Ser718Pro	missense	Exon 14 of 20	ENSP00000379721.3	P40818-1
	USP8	ENST00000956759.1		c.2278T>C	p.Ser760Pro	missense	Exon 15 of 21	ENSP00000626818.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461890 Hom.: 0 Cov.: 34 AF XY: 0.00000138 AC XY: 1 AN XY: 727246

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.00 AC: 0 AN: 33480

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: 86258

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

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 8.99e-7 AC: 1 AN: 1112008

Other (OTH) AF: 0.00 AC: 0 AN: 60396

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions as Germline

Significance: Pathogenic

Revision: no assertion criteria provided

Pathogenic	VUS	Benign	Condition
2	-	-	Pituitary dependent hypercortisolism (2)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.99
BayesDel_addAF	Benign	-0.0032	T
BayesDel_noAF	Benign	-0.24
CADD	Uncertain	26
DANN	Pathogenic	1.0
DEOGEN2	Uncertain	0.42	T
Eigen	Uncertain	0.48
Eigen_PC	Uncertain	0.56
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.93	D
M_CAP	Benign	0.032	D
MetaRNN	Uncertain	0.46	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Uncertain	2.0	M
PhyloP100		6.0
PrimateAI	Uncertain	0.72	T
PROVEAN	Uncertain	-3.0	D
REVEL	Benign	0.25
Sift	Pathogenic	0.0	D
Sift4G	Uncertain	0.0080	D
Polyphen		1.0	D
Vest4		0.65
MutPred		0.19		Loss of phosphorylation at S718 (P = 0.0017)
MVP		0.27
ClinPred		0.97	D
GERP RS		5.6
Varity_R		0.81
gMVP		0.76
Mutation Taster		=1/99	disease causing (ClinVar)

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: rs672601307; hg19: chr15-50782640; COSMIC: COSV56162050; COSMIC: COSV56162050;