5-14664890-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_138348.6(OTULIN):c.65C>T(p.Ala22Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000973 in 1,027,430 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A22E) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 34)
  • Exomes 𝑓: 9.7e-7 (0 hom.)
• Consequence: OTULIN NM_138348.6 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.489

Genes affected

OTULIN (HGNC:25118): (OTU deubiquitinase with linear linkage specificity) This gene encodes a member of the peptidase C65 family of ubiquitin isopeptidases. Members of this family remove ubiquitin from proteins. The encoded enzyme specifically recognizes and removes M1(Met1)-linked, or linear, ubiquitin chains from protein substrates. Linear ubiquitin chains are known to regulate the NF-kappa B signaling pathway in the context of immunity and inflammation. Mutations in this gene cause a potentially fatal autoinflammatory syndrome in human patients. [provided by RefSeq, Sep 2016]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.1365034).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
OTULIN	NM_138348.6	c.65C>T	p.Ala22Val	missense_variant	1/7	ENST00000284274.5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
OTULIN	ENST00000284274.5	c.65C>T	p.Ala22Val	missense_variant	1/7	1	NM_138348.6	P1
OTULIN	ENST00000507335.1	n.159C>T		non_coding_transcript_exon_variant	1/2	2
OTULIN	ENST00000697367.1	c.65C>T	p.Ala22Val	missense_variant, NMD_transcript_variant	1/5
OTULIN	ENST00000503023.2	c.65C>T	p.Ala22Val	missense_variant, NMD_transcript_variant	1/6	5

Frequencies

GnomAD3 genomes Cov.: 34

GnomAD4 exome AF: 9.73e-7 AC: 1 AN: 1027430 Hom.: 0 Cov.: 30 AF XY: 0.00 AC XY: 0 AN XY: 485012

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

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: 0.00000112

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 34

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

Jun 22, 2021

In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may create or strengthen a splice site, but this prediction has not been confirmed by published transcriptional studies. Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0"). This variant has not been reported in the literature in individuals with OTULIN-related conditions. The frequency data for this variant in the population databases is considered unreliable, as metrics indicate insufficient coverage at this position in the ExAC database. This sequence change replaces alanine with valine at codon 22 of the OTULIN protein (p.Ala22Val). The alanine residue is moderately conserved and there is a small physicochemical difference between alanine and valine. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.10
BayesDel_addAF	Benign	-0.31	T
BayesDel_noAF	Benign	-0.68
Cadd	Benign	22
Dann	Uncertain	1.0
DEOGEN2	Benign	0.010	T
Eigen	Benign	-0.49
Eigen_PC	Benign	-0.40
FATHMM_MKL	Benign	0.44	N
LIST_S2	Benign	0.51	T
M_CAP	Uncertain	0.16	D
MetaRNN	Benign	0.14	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	1.8	L
MutationTaster	Benign	0.99	N
PrimateAI	Pathogenic	0.84	D
PROVEAN	Benign	-0.040	N
REVEL	Benign	0.034
Sift	Benign	0.084	T
Sift4G	Benign	0.18	T
Polyphen		0.036	B
Vest4		0.23
MutPred		0.21		Gain of MoRF binding (P = 0.0708);
MVP		0.13
MPC		1.2
ClinPred		0.34	T
GERP RS		2.0
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.060
gMVP		0.32

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.15		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

Other links and lift over

dbSNP: rs1285122539; hg19: chr5-14664999;