chr16-681849-G-C

Variant names:

• chr16-681849-G-C
• rs377648766
• NM_005861.4:c.581G>C

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 3P and 2B. PM2 PP2 BP4_Moderate

The NM_005861.4(STUB1):​c.581G>C​(p.Arg194Pro) variant causes a missense change. The variant allele was found at a frequency of 0.00000137 in 1,459,562 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/22 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R194Q) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 34)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: STUB1 NM_005861.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 4.38
• Publications: 0 publications found

Genes affected

STUB1 (HGNC:11427): (STIP1 homology and U-box containing protein 1) This gene encodes a protein containing tetratricopeptide repeat and a U-box that functions as a ubiquitin ligase/cochaperone. The encoded protein binds to and ubiquitinates shock cognate 71 kDa protein (Hspa8) and DNA polymerase beta (Polb), among other targets. Mutations in this gene cause spinocerebellar ataxia, autosomal recessive 16. Alternative splicing results in multiple transcript variants. There is a pseudogene for this gene on chromosome 2. [provided by RefSeq, Jun 2014]

JMJD8 (HGNC:14148): (jumonji domain containing 8) Involved in several processes, including positive regulation of I-kappaB kinase/NF-kappaB signaling; positive regulation of sprouting angiogenesis; and regulation of glycolytic process. Located in endoplasmic reticulum lumen and nucleus. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

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

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in the gene, where a lot of missense mutations are associated with disease in ClinVar. The gene has 18 curated pathogenic missense variants (we use a threshold of 10). The gene has 4 curated benign missense variants. Gene score misZ: 1.1638 (below the threshold of 3.09). Trascript score misZ: -0.9945 (below the threshold of 3.09). GenCC associations: The gene is linked to spinocerebellar ataxia 48, autosomal recessive spinocerebellar ataxia 16.
• BP4: Computational evidence support a benign effect (MetaRNN=0.2609978).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_005861.4. 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
	STUB1	NM_005861.4	MANE Select	c.581G>C	p.Arg194Pro	missense	Exon 4 of 7	NP_005852.2	Q9UNE7-1
	JMJD8	NM_001005920.4	MANE Select	c.*945C>G		3_prime_UTR	Exon 9 of 9	NP_001005920.3	Q96S16-1
	STUB1	NM_001293197.2		c.365G>C	p.Arg122Pro	missense	Exon 4 of 7	NP_001280126.1	Q9UNE7-2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	STUB1	ENST00000219548.9	TSL:1 MANE Select	c.581G>C	p.Arg194Pro	missense	Exon 4 of 7	ENSP00000219548.4	Q9UNE7-1
	STUB1	ENST00000565677.5	TSL:1	c.365G>C	p.Arg122Pro	missense	Exon 4 of 7	ENSP00000457228.1	Q9UNE7-2
	JMJD8	ENST00000609261.6	TSL:1 MANE Select	c.*945C>G		3_prime_UTR	Exon 9 of 9	ENSP00000477481.1	Q96S16-1

Frequencies

GnomAD3 genomes Cov.: 34

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1459562 Hom.: 0 Cov.: 33 AF XY: 0.00000138 AC XY: 1 AN XY: 725870

African (AFR) AF: 0.00 AC: 0 AN: 33470

American (AMR) AF: 0.00 AC: 0 AN: 44664

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26130

East Asian (EAS) AF: 0.00 AC: 0 AN: 39658

South Asian (SAS) AF: 0.00 AC: 0 AN: 86198

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 52116

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5762

European-Non Finnish (NFE) AF: 0.00000180 AC: 2 AN: 1111246

Other (OTH) AF: 0.00 AC: 0 AN: 60318

GnomAD4 genome Cov.: 34

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.19
BayesDel_addAF	Benign	-0.0063	T
BayesDel_noAF	Benign	-0.25
CADD	Benign	23
DANN	Benign	0.96
DEOGEN2	Uncertain	0.45	T
Eigen	Benign	-0.16
Eigen_PC	Benign	-0.022
FATHMM_MKL	Uncertain	0.95	D
LIST_S2	Benign	0.78	T
M_CAP	Benign	0.015	T
MetaRNN	Benign	0.26	T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	1.6	L
PhyloP100		4.4
PrimateAI	Uncertain	0.54	T
PROVEAN	Benign	-0.78	N
REVEL	Benign	0.13
Sift	Benign	0.12	T
Sift4G	Benign	0.27	T
Polyphen		0.0030	B
Vest4		0.80
MutPred		0.31		Loss of catalytic residue at R194 (P = 0.0367)
MVP		0.33
MPC		0.076
ClinPred		0.60	D
GERP RS		4.2
PromoterAI		-0.065	Neutral
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.45
gMVP		0.81
Mutation Taster		=60/40	polymorphism

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: rs377648766; hg19: chr16-731849;