chr11-4107509-T-A

Variant names:

• chr11-4107509-T-A
• rs2228121
• NM_001033.5:c.361T>A

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_001033.5(RRM1):​c.361T>A​(p.Leu121Met) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000685 in 1,460,744 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/22 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. L121L) has been classified as Benign.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: RRM1 NM_001033.5 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.16
• 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, autosomal recessive 6

  Inheritance: AR, AD Classification: MODERATE, LIMITED Submitted by: PanelApp Australia, G2P
• progressive external ophthalmoplegia with mitochondrial DNA deletions

  Inheritance: AD, AR Classification: LIMITED Submitted by: Ambry Genetics

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.13049954).

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

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	RRM1	NM_001033.5	MANE Select	c.361T>A	p.Leu121Met	missense	Exon 4 of 19	NP_001024.1	P23921
	RRM1	NM_001318064.1		c.70T>A	p.Leu24Met	missense	Exon 3 of 18	NP_001304993.1	B4E0I8

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	RRM1	ENST00000300738.10	TSL:1 MANE Select	c.361T>A	p.Leu121Met	missense	Exon 4 of 19	ENSP00000300738.5	P23921
	RRM1	ENST00000854928.1		c.361T>A	p.Leu121Met	missense	Exon 4 of 19	ENSP00000524987.1
	RRM1	ENST00000854929.1		c.361T>A	p.Leu121Met	missense	Exon 4 of 18	ENSP00000524988.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 6.85e-7 AC: 1 AN: 1460744 Hom.: 0 Cov.: 29 AF XY: 0.00000138 AC XY: 1 AN XY: 726752

African (AFR) AF: 0.00 AC: 0 AN: 33442

American (AMR) AF: 0.00 AC: 0 AN: 44722

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26120

East Asian (EAS) AF: 0.00 AC: 0 AN: 39648

South Asian (SAS) AF: 0.00 AC: 0 AN: 86234

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53406

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5756

European-Non Finnish (NFE) AF: 9.00e-7 AC: 1 AN: 1111056

Other (OTH) AF: 0.00 AC: 0 AN: 60360

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.12
BayesDel_addAF	Benign	-0.13	T
BayesDel_noAF	Benign	-0.42
CADD	Benign	16
DANN	Benign	0.96
DEOGEN2	Benign	0.20	T
Eigen	Benign	-0.74
Eigen_PC	Benign	-0.58
FATHMM_MKL	Uncertain	0.79	D
LIST_S2	Uncertain	0.87	D
M_CAP	Benign	0.014	T
MetaRNN	Benign	0.13	T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	0.32	N
PhyloP100		1.2
PrimateAI	Uncertain	0.54	T
PROVEAN	Benign	-0.050	N
REVEL	Benign	0.13
Sift	Benign	0.13	T
Sift4G	Benign	0.084	T
Polyphen		0.039	B
Vest4		0.47
MutPred		0.36		Gain of catalytic residue at L121 (P = 0.0374)
MVP		0.31
MPC		0.84
ClinPred		0.31	T
GERP RS		-0.33
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.26
gMVP		0.81
Mutation Taster		=69/31	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: rs2228121; hg19: chr11-4128739;