11-4119902-C-T

Variant names:

• chr11-4119902-C-T
• rs183484
• NM_001033.5:c.850C>T

Variant summary

Our verdict is Pathogenic. The variant received 10 ACMG points: 10P and 0B. PVS1 PM2

The NM_001033.5(RRM1):​c.850C>T​(p.Arg284*) variant causes a stop gained change. The variant allele was found at a frequency of 0.000000691 in 1,447,964 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Variant results in nonsense mediated mRNA decay.

• Frequency:
  • Genomes: not found (cov: 31)
  • Exomes 𝑓: 6.9e-7 (0 hom.)
• Consequence: RRM1 NM_001033.5 stop_gained
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 5.82
• Publications: 0 publications found

Genes affected

RRM1 (HGNC:10451): (ribonucleotide reductase catalytic subunit M1) This gene encodes the large and catalytic subunit of ribonucleotide reductase, an enzyme essential for the conversion of ribonucleotides into deoxyribonucleotides. A pool of available deoxyribonucleotides is important for DNA replication during S phase of the cell cycle as well as multiple DNA repair processes. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Dec 2015]

RRM1 Gene-Disease associations (from GenCC):

• progressive external ophthalmoplegia with mitochondrial DNA deletions

  Inheritance: AR, AD Classification: LIMITED Submitted by: Ambry Genetics
• progressive external ophthalmoplegia with mitochondrial dna deletions, autosomal recessive 6

  Inheritance: AR, AD Classification: LIMITED Submitted by: G2P

ACMG classification

Our verdict: Pathogenic. The variant received 10 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

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001033.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	RRM1	NM_001033.5	MANE Select	c.850C>T	p.Arg284*	stop_gained	Exon 9 of 19	NP_001024.1
	RRM1	NM_001318065.1		c.-207C>T		5_prime_UTR_premature_start_codon_gain	Exon 3 of 13	NP_001304994.1
	RRM1	NM_001318064.1		c.559C>T	p.Arg187*	stop_gained	Exon 8 of 18	NP_001304993.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	RRM1	ENST00000300738.10	TSL:1 MANE Select	c.850C>T	p.Arg284*	stop_gained	Exon 9 of 19	ENSP00000300738.5
	RRM1	ENST00000534285.5	TSL:5	c.184C>T	p.Arg62*	stop_gained	Exon 3 of 13	ENSP00000431464.1
	RRM1	ENST00000526304.5	TSL:4	n.158C>T		non_coding_transcript_exon	Exon 3 of 6

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome AF: 6.91e-7 AC: 1 AN: 1447964 Hom.: 0 Cov.: 28 AF XY: 0.00 AC XY: 0 AN XY: 721162

African (AFR) AF: 0.00 AC: 0 AN: 33374

American (AMR) AF: 0.00 AC: 0 AN: 44230

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26026

East Asian (EAS) AF: 0.00 AC: 0 AN: 39590

South Asian (SAS) AF: 0.00 AC: 0 AN: 85692

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53390

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5732

European-Non Finnish (NFE) AF: 9.09e-7 AC: 1 AN: 1099968

Other (OTH) AF: 0.00 AC: 0 AN: 59962

GnomAD4 genome Cov.: 31

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.62	D
BayesDel_noAF	Pathogenic	0.66
CADD	Pathogenic	39
DANN	Uncertain	1.0
Eigen	Pathogenic	0.92
Eigen_PC	Pathogenic	0.82
FATHMM_MKL	Pathogenic	0.98	D
PhyloP100		5.8
Vest4		0.95
GERP RS		5.7
Mutation Taster		=2/198	disease causing (fs/PTC)

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: rs183484; hg19: chr11-4141132;