8-102205055-C-A

Variant names:

• chr8-102205055-C-A
• rs113860402
• NM_015713.5:c.*3078G>T

Variant summary

Our verdict is Benign. The variant received -9 ACMG points: 0P and 9B. BP4_Strong BP6 BS1

The NM_015713.5(RRM2B):​c.*3078G>T variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00164 in 152,282 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 Conflicting classifications of pathogenicity (no stars).

• Frequency:
  • Genomes: 𝑓 0.0016 (0 hom., cov: 32)
  • Failed GnomAD Quality Control
• Consequence: RRM2B NM_015713.5 3_prime_UTR
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1 B:1
• Conservation: PhyloP100: -0.325
• Publications: 1 publications found

Genes affected

RRM2B (HGNC:17296): (ribonucleotide reductase regulatory TP53 inducible subunit M2B) This gene encodes the small subunit of a p53-inducible ribonucleotide reductase. This heterotetrameric enzyme catalyzes the conversion of ribonucleoside diphosphates to deoxyribonucleoside diphosphates. The product of this reaction is necessary for DNA synthesis. Mutations in this gene have been associated with autosomal recessive mitochondrial DNA depletion syndrome, autosomal dominant progressive external ophthalmoplegia-5, and mitochondrial neurogastrointestinal encephalopathy. Alternatively spliced transcript variants have been described.[provided by RefSeq, Feb 2010]

RRM2B Gene-Disease associations (from GenCC):

• mitochondrial DNA depletion syndrome 8a

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: PanelApp Australia, Orphanet, G2P, Labcorp Genetics (formerly Invitae)
• progressive external ophthalmoplegia with mitochondrial DNA deletions, autosomal dominant 5

  Inheritance: AD Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae), PanelApp Australia
• adult-onset chronic progressive external ophthalmoplegia with mitochondrial myopathy

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• autosomal dominant progressive external ophthalmoplegia

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• Kearns-Sayre syndrome

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• mitochondrial neurogastrointestinal encephalomyopathy

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

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

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.89).
• BP6: Variant 8-102205055-C-A is Benign according to our data. Variant chr8-102205055-C-A is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 361133.
• BS1: Variant frequency is greater than expected in population nfe. GnomAd4 allele frequency = 0.00164 (249/152282) while in subpopulation NFE AF = 0.00271 (184/67996). AF 95% confidence interval is 0.00239. There are 0 homozygotes in GnomAd4. There are 102 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_015713.5. 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
	RRM2B	NM_015713.5	MANE Select	c.*3078G>T		3_prime_UTR	Exon 9 of 9	NP_056528.2
	RRM2B	NM_001172477.1		c.*3078G>T		3_prime_UTR	Exon 9 of 9	NP_001165948.1	Q7LG56-6
	RRM2B	NM_001172478.2		c.*3078G>T		3_prime_UTR	Exon 8 of 8	NP_001165949.1	Q7LG56-2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	RRM2B	ENST00000251810.8	TSL:1 MANE Select	c.*3078G>T		3_prime_UTR	Exon 9 of 9	ENSP00000251810.3	Q7LG56-1
	RRM2B	ENST00000930763.1		c.*3078G>T		3_prime_UTR	Exon 9 of 9	ENSP00000600822.1
	RRM2B	ENST00000941786.1		c.*3078G>T		3_prime_UTR	Exon 7 of 7	ENSP00000611845.1

Frequencies

GnomAD3 genomes AF: 0.00164 AC: 249 AN: 152164 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.000579

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000982

Gnomad ASJ AF: 0.00230

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00113

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00271

Gnomad OTH AF: 0.00287

GnomAD4 exome Data not reliable, filtered out with message: AC0 AC: 0 AN: 0 Hom.: 0 Cov.: 0 AC XY: 0 AN XY: 0

African (AFR) AC: 0 AN: 0

American (AMR) AC: 0 AN: 0

Ashkenazi Jewish (ASJ) AC: 0 AN: 0

East Asian (EAS) AC: 0 AN: 0

South Asian (SAS) AC: 0 AN: 0

European-Finnish (FIN) AC: 0 AN: 0

Middle Eastern (MID) AC: 0 AN: 0

European-Non Finnish (NFE) AC: 0 AN: 0

Other (OTH) AC: 0 AN: 0

GnomAD4 genome AF: 0.00164 AC: 249 AN: 152282 Hom.: 0 Cov.: 32 AF XY: 0.00137 AC XY: 102 AN XY: 74478

African (AFR) AF: 0.000577 AC: 24 AN: 41564

American (AMR) AF: 0.000980 AC: 15 AN: 15302

Ashkenazi Jewish (ASJ) AF: 0.00230 AC: 8 AN: 3472

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

South Asian (SAS) AF: 0.00 AC: 0 AN: 4828

European-Finnish (FIN) AF: 0.00113 AC: 12 AN: 10614

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 294

European-Non Finnish (NFE) AF: 0.00271 AC: 184 AN: 67996

Other (OTH) AF: 0.00284 AC: 6 AN: 2110

Alfa AF: 0.00261 Hom.: 2

Bravo AF: 0.00162

Asia WGS AF: 0.000289 AC: 1 AN: 3478

ClinVar

ClinVar submissions

Significance: Conflicting classifications of pathogenicity

Revision: criteria provided, conflicting classifications

Pathogenic	VUS	Benign	Condition
-	1	-	Mitochondrial DNA depletion syndrome 8a (1)
-	-	1	Progressive external ophthalmoplegia with mitochondrial DNA deletions, autosomal dominant 5 (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.89
CADD	Benign	0.52
DANN	Benign	0.63
PhyloP100		-0.33
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.0
Mutation Taster		=100/0	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: rs113860402; hg19: chr8-103217283;