9-35555641-C-T

Variant names:

• chr9-35555641-C-T
• rs1402086660
• NM_014806.5:c.2596C>T

Variant summary

Our verdict is Pathogenic. The variant received 12 ACMG points: 12P and 0B. PVS1 PM2 PP5_Moderate

The NM_014806.5(RUSC2):​c.2596C>T​(p.Arg866*) variant causes a stop gained change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (★). Variant results in nonsense mediated mRNA decay.

• Frequency: Genomes: not found (cov: 32)
• Consequence: RUSC2 NM_014806.5 stop_gained
• Clinical Significance: Pathogenic criteria provided, single submitter P:2
• Conservation: PhyloP100: 1.38
• Publications: 0 publications found

Genes affected

RUSC2 (HGNC:23625): (RUN and SH3 domain containing 2) This gene encodes a RUN and SH3 domain containing protein that interacts with Rab1b and Rab1-binding protein GM130. Alternatively spliced transcript variants have been observed for this gene. [provided by RefSeq, Jun 2012]

RUSC2 Gene-Disease associations (from GenCC):

• intellectual disability, autosomal recessive 61

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

ACMG classification

Our verdict: Pathogenic. The variant received 12 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 9-35555641-C-T is Pathogenic according to our data. Variant chr9-35555641-C-T is described in ClinVar as Pathogenic. ClinVar VariationId is 446385.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
RUSC2	NM_014806.5	c.2596C>T	p.Arg866*	stop_gained	Exon 3 of 12	ENST00000361226.8	NP_055621.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
RUSC2	ENST00000361226.8	c.2596C>T	p.Arg866*	stop_gained	Exon 3 of 12	2	NM_014806.5	ENSP00000355177.3
RUSC2	ENST00000455600.1	c.2596C>T	p.Arg866*	stop_gained	Exon 3 of 12	1		ENSP00000393922.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:2

Revision: criteria provided, single submitter

Submissions by phenotype

Intellectual disability, autosomal recessive 61 Pathogenic:1

Apr 07, 2022

OMIM

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

not provided Pathogenic:1

Jan 17, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

For these reasons, this variant has been classified as Pathogenic. ClinVar contains an entry for this variant (Variation ID: 446385). This premature translational stop signal has been observed in individual(s) with clinical features of RUSC2-related conditions (PMID: 27612186). This variant is not present in population databases (gnomAD no frequency). This sequence change creates a premature translational stop signal (p.Arg866*) in the RUSC2 gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in RUSC2 are known to be pathogenic (PMID: 27612186).

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.54	D
BayesDel_noAF	Pathogenic	0.54
CADD	Pathogenic	37
DANN	Uncertain	1.0
DEOGEN2	Benign	0.0	.;.
Eigen	Pathogenic	0.69
Eigen_PC	Uncertain	0.53
FATHMM_MKL	Uncertain	0.84	D
LIST_S2	Benign	0.0	.;.
MetaRNN	Benign	0.0	.;.
MutationAssessor	Benign	0.0	.;.
PhyloP100		1.4
PROVEAN	Benign	0.0	.;.
REVEL	Benign	0.0
Sift	Pathogenic	0.0	.;.
Sift4G	Pathogenic	0.0	.;.
Vest4		0.25
GERP RS		4.1
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Mutation Taster		=2/198	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: rs1402086660; hg19: chr9-35555638;