chr18-198048-C-G

Variant names:

• chr18-198048-C-G
• rs1046788963
• NM_005151.4:c.677C>G

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM2 BP4

The NM_005151.4(USP14):​c.677C>G​(p.Thr226Arg) variant causes a missense, splice region change. The variant allele was found at a frequency of 0.00000437 in 1,602,648 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 2/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: 𝑓 0.0000066 (0 hom., cov: 33)
  • Exomes 𝑓: 0.0000041 (0 hom.)
• Consequence: USP14 NM_005151.4 missense, splice_region
• Scores: Splicing: ADA: 0.9841
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 5.28
• Publications: 0 publications found

Genes affected

USP14 (HGNC:12612): (ubiquitin specific peptidase 14) This gene encodes a member of the ubiquitin-specific processing (UBP) family of proteases that is a deubiquitinating enzyme (DUB) with His and Cys domains. This protein is located in the cytoplasm and cleaves the ubiquitin moiety from ubiquitin-fused precursors and ubiquitinylated proteins. Mice with a mutation that results in reduced expression of the ortholog of this protein are retarded for growth, develop severe tremors by 2 to 3 weeks of age followed by hindlimb paralysis and death by 6 to 10 weeks of age. Alternate transcriptional splice variants, encoding different isoforms, have been characterized. [provided by RefSeq, Jul 2008]

USP14 Gene-Disease associations (from GenCC):

• complex neurodevelopmental disorder

  Inheritance: AR Classification: MODERATE Submitted by: G2P

ACMG classification

Our verdict: Uncertain_significance. The variant received 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.41745064).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
USP14	NM_005151.4	c.677C>G	p.Thr226Arg	missense_variant, splice_region_variant	Exon 9 of 16	ENST00000261601.8	NP_005142.1
USP14	NM_001037334.2	c.572C>G	p.Thr191Arg	missense_variant, splice_region_variant	Exon 8 of 15		NP_001032411.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
USP14	ENST00000261601.8	c.677C>G	p.Thr226Arg	missense_variant, splice_region_variant	Exon 9 of 16	1	NM_005151.4	ENSP00000261601.6

Frequencies

GnomAD3 genomes AF: 0.00000658 AC: 1 AN: 152084 Hom.: 0 Cov.: 33

Gnomad AFR AF: 0.0000241

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: 0.00

Gnomad OTH AF: 0.00

GnomAD4 exome AF: 0.00000414 AC: 6 AN: 1450564 Hom.: 0 Cov.: 30 AF XY: 0.00000554 AC XY: 4 AN XY: 721406

African (AFR) AF: 0.00 AC: 0 AN: 33076

American (AMR) AF: 0.00 AC: 0 AN: 43206

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25742

East Asian (EAS) AF: 0.00 AC: 0 AN: 39600

South Asian (SAS) AF: 0.00 AC: 0 AN: 83836

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 52952

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5722

European-Non Finnish (NFE) AF: 0.00000452 AC: 5 AN: 1106638

Other (OTH) AF: 0.0000167 AC: 1 AN: 59792

GnomAD4 genome AF: 0.00000658 AC: 1 AN: 152084 Hom.: 0 Cov.: 33 AF XY: 0.00 AC XY: 0 AN XY: 74286

African (AFR) AF: 0.0000241 AC: 1 AN: 41412

American (AMR) AF: 0.00 AC: 0 AN: 15256

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3470

East Asian (EAS) AF: 0.00 AC: 0 AN: 5190

South Asian (SAS) AF: 0.00 AC: 0 AN: 4826

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10586

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

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 68026

Other (OTH) AF: 0.00 AC: 0 AN: 2090

Alfa AF: 0.00 Hom.: 0

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Sep 29, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.677C>G (p.T226R) alteration is located in exon 9 (coding exon 9) of the USP14 gene. This alteration results from a C to G substitution at nucleotide position 677, causing the threonine (T) at amino acid position 226 to be replaced by an arginine (R). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.16
BayesDel_addAF	Uncertain	0.014	T
BayesDel_noAF	Benign	-0.22
CADD	Pathogenic	27
DANN	Uncertain	0.99
DEOGEN2	Benign	0.0060	.;.;T;T
Eigen	Uncertain	0.68
Eigen_PC	Pathogenic	0.72
FATHMM_MKL	Pathogenic	1.0	D
LIST_S2	Benign	0.76	T;T;T;T
M_CAP	Benign	0.020	T
MetaRNN	Benign	0.42	T;T;T;T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	1.3	.;.;.;L
PhyloP100		5.3
PrimateAI	Uncertain	0.60	T
PROVEAN	Benign	-1.0	.;N;.;N
REVEL	Benign	0.22
Sift	Benign	0.043	.;D;.;D
Sift4G	Benign	0.19	T;T;T;T
Polyphen		0.99	.;.;.;D
Vest4		0.55
MutPred		0.39		.;.;.;Loss of phosphorylation at T226 (P = 0.0101);
MVP		0.36
MPC		1.2
ClinPred		0.54	D
GERP RS		6.2
Varity_R		0.23
gMVP		0.48
Mutation Taster		=16/84	disease causing

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Pathogenic	0.98
dbscSNV1_RF	Benign	0.69
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: rs1046788963; hg19: chr18-198048;