Genetic Variant METTL25B:p.Arg219Cys (chr1-156734027-C-T) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_015997.4(METTL25B):c.655C>T(p.Arg219Cys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000449 in 1,604,808 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 12/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R219H) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000026 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000047 ( 1 hom. )

Consequence

METTL25B
NM_015997.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.840

Variant links:

Genes affected

METTL25B (HGNC:24273): (methyltransferase like 25B) Predicted to enable rRNA (adenine-N6,N6-)-dimethyltransferase activity. Predicted to be involved in rRNA methylation. Predicted to be integral component of membrane. [provided by Alliance of Genome Resources, Apr 2022]

METTL25B links:

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ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.0465208).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
METTL25B	NM_015997.4 link	c.655C>T	p.Arg219Cys	missense_variant	Exon 6 of 8	ENST00000368216.9	NP_057081.3	Q96FB5-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
METTL25B	ENST00000368216.9 link	c.655C>T	p.Arg219Cys	missense_variant	Exon 6 of 8	1	NM_015997.4	ENSP00000357199.4		Q96FB5-1

Frequencies

GnomAD3 genomes

AF:

0.0000263

AC:

AN:

152248

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000620

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000571

AC:

AN:

245132

Hom.:

AF XY:

0.0000755

AC XY:

AN XY:

132392

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.000405

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000181

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000468

AC:

AN:

1452442

Hom.:

Cov.:

AF XY:

0.0000610

AC XY:

AN XY:

721278

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.000586

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000145

Gnomad4 OTH exome

AF:

0.0000167

GnomAD4 genome

AF:

0.0000263

AC:

AN:

152366

Hom.:

Cov.:

AF XY:

0.0000134

AC XY:

AN XY:

74514

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000621

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000566

Hom.:

Bravo

AF:

0.00000378

ExAC

AF:

0.0000741

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Dec 03, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.655C>T (p.R219C) alteration is located in exon 6 (coding exon 6) of the RRNAD1 gene. This alteration results from a C to T substitution at nucleotide position 655, causing the arginine (R) at amino acid position 219 to be replaced by a cysteine (C). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.075

BayesDel_addAF

Benign

-0.32

BayesDel_noAF

Benign

-0.38

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Benign

0.032

T;T

Eigen

Benign

0.014

Eigen_PC

Benign

-0.092

FATHMM_MKL

Benign

0.18

LIST_S2

Benign

0.76

T;T

M_CAP

Benign

0.021

MetaRNN

Benign

0.047

T;T

MetaSVM

Benign

-1.0

MutationAssessor

Uncertain

2.4

M;.

PrimateAI

Benign

0.30

PROVEAN

Benign

-1.1

N;N

REVEL

Benign

0.15

Sift

Benign

0.033

D;D

Sift4G

Benign

0.080

T;D

Polyphen

0.92

P;.

Vest4

0.24

MutPred

0.43

Loss of MoRF binding (P = 0.0521);.;

MVP

0.63

MPC

0.59

ClinPred

0.25

GERP RS

3.0

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.097

gMVP

0.34

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.10

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over