8-102224909-G-C

Position:

• chr8-102224909-G-C

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The ENST00000251810.8(RRM2B):​c.431C>G​(p.Thr144Ser) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. T144I) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: RRM2B ENST00000251810.8 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 9.94

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]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
RRM2B	NM_015713.5	c.431C>G	p.Thr144Ser	missense_variant	4/9	ENST00000251810.8	NP_056528.2
RRM2B	NM_001172477.1	c.647C>G	p.Thr216Ser	missense_variant	4/9		NP_001165948.1
RRM2B	NM_001172478.2	c.275C>G	p.Thr92Ser	missense_variant	3/8		NP_001165949.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
RRM2B	ENST00000251810.8	c.431C>G	p.Thr144Ser	missense_variant	4/9	1	NM_015713.5	ENSP00000251810	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.16
BayesDel_addAF	Pathogenic	0.35	D
BayesDel_noAF	Pathogenic	0.26
CADD	Pathogenic	26
DANN	Uncertain	0.99
DEOGEN2	Pathogenic	0.91	D;T;.
Eigen	Uncertain	0.40
Eigen_PC	Uncertain	0.56
FATHMM_MKL	Pathogenic	1.0	D
LIST_S2	Uncertain	0.96	D;D;D
M_CAP	Uncertain	0.094	D
MetaRNN	Uncertain	0.74	D;D;D
MetaSVM	Pathogenic	0.80	D
MutationAssessor	Uncertain	2.3	M;.;.
MutationTaster	Benign	1.0	D;D;D;D;D
PrimateAI	Uncertain	0.65	T
PROVEAN	Uncertain	-3.6	D;.;D
REVEL	Uncertain	0.61
Sift	Benign	0.038	D;.;D
Sift4G	Benign	0.12	T;T;T
Polyphen		0.16	B;.;B
Vest4		0.72
MutPred		0.67		Gain of disorder (P = 0.0885);.;.;
MVP		0.96
MPC		0.36
ClinPred		0.96	D
GERP RS		5.8
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		2.7
Varity_R		0.76
gMVP		0.88

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

Publications

LitVar

Other links and lift over

dbSNP: rs515726189; hg19: chr8-103237137;