NM_005802.5:c.*100C>G

Variant names:

• chr9-32541287-G-C
• rs886063852
• NM_005802.5:c.*100C>G

Variant summary

Our verdict is Benign. The variant received -9 ACMG points: 0P and 9B. BP4_Strong BS1_Supporting BS2

The NM_005802.5(TOPORS):​c.*100C>G variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000054 in 1,203,734 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: 𝑓 0.000033 (0 hom., cov: 32)
  • Exomes 𝑓: 0.000057 (0 hom.)
• Consequence: TOPORS NM_005802.5 3_prime_UTR
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.0470
• Publications: 0 publications found

Genes affected

TOPORS (HGNC:21653): (TOP1 binding arginine/serine rich protein, E3 ubiquitin ligase) This gene encodes a nuclear protein which is serine and arginine rich, and contains a RING-type zinc finger domain. It is highly expressed in the testis, and functions as an ubiquitin-protein E3 ligase. Mutations in this gene are associated with retinitis pigmentosa type 31. Alternatively spliced transcript variants, encoding different isoforms, have been observed for this locus. [provided by RefSeq, Sep 2010]

TOPORS Gene-Disease associations (from GenCC):

• retinitis pigmentosa 31

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: G2P, PanelApp Australia, Labcorp Genetics (formerly Invitae)
• TOPORS-related retinopathy

  Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
• retinitis pigmentosa

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• ciliopathy

  Inheritance: AR Classification: LIMITED Submitted by: PanelApp Australia

ENSG00000288684 (HGNC:):

ACMG classification

Our verdict: Benign. The variant received -9 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.92).
• BS1: Variant frequency is greater than expected in population eas. GnomAd4 allele frequency = 0.0000329 (5/152130) while in subpopulation EAS AF = 0.00077 (4/5198). AF 95% confidence interval is 0.000262. There are 0 homozygotes in GnomAd4. There are 3 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting
• BS2: High AC in GnomAd4 at 5 AD gene.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_005802.5. 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
	TOPORS	NM_005802.5	MANE Select	c.*100C>G		3_prime_UTR	Exon 3 of 3	NP_005793.2
	TOPORS	NM_001195622.2		c.*100C>G		3_prime_UTR	Exon 2 of 2	NP_001182551.1	Q9NS56-2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TOPORS	ENST00000360538.7	TSL:1 MANE Select	c.*100C>G		3_prime_UTR	Exon 3 of 3	ENSP00000353735.2	Q9NS56-1
	TOPORS	ENST00000379858.1	TSL:1	c.*100C>G		3_prime_UTR	Exon 2 of 2	ENSP00000369187.1	Q9NS56-2
	ENSG00000288684	ENST00000681750.1		c.-45+9487C>G		intron	N/A	ENSP00000506413.1	A0A7P0TB70

Frequencies

GnomAD3 genomes AF: 0.0000329 AC: 5 AN: 152130 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0000655

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.000770

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: 0.0000571 AC: 60 AN: 1051604 Hom.: 0 Cov.: 13 AF XY: 0.0000677 AC XY: 36 AN XY: 531942

African (AFR) AF: 0.00 AC: 0 AN: 24136

American (AMR) AF: 0.00 AC: 0 AN: 31796

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 22282

East Asian (EAS) AF: 0.00173 AC: 60 AN: 34680

South Asian (SAS) AF: 0.00 AC: 0 AN: 70794

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 43424

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 3540

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 774690

Other (OTH) AF: 0.00 AC: 0 AN: 46262

GnomAD4 genome AF: 0.0000329 AC: 5 AN: 152130 Hom.: 0 Cov.: 32 AF XY: 0.0000404 AC XY: 3 AN XY: 74320

African (AFR) AF: 0.00 AC: 0 AN: 41426

American (AMR) AF: 0.0000655 AC: 1 AN: 15274

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3468

East Asian (EAS) AF: 0.000770 AC: 4 AN: 5198

South Asian (SAS) AF: 0.00 AC: 0 AN: 4832

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10604

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 314

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 68010

Other (OTH) AF: 0.00 AC: 0 AN: 2092

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.0000718

Asia WGS AF: 0.000289 AC: 1 AN: 3478

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	Retinitis pigmentosa (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.92
CADD	Benign	5.4
DANN	Benign	0.53
PhyloP100		0.047

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: rs886063852; hg19: chr9-32541285;