Genetic Variant RRP1B:p.Arg214Leu (chr21-43676759-G-T) – ACMG Classification: Uncertain_significance (1 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM2BP4

The NM_015056.3(RRP1B):c.641G>T(p.Arg214Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,836 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/22 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R214Q) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

RRP1B
NM_015056.3 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 0.304

Publications

0 publications found

Variant links:

Genes affected

RRP1B (HGNC:23818): (ribosomal RNA processing 1B) Enables transcription coactivator activity. Involved in several processes, including cellular response to virus; positive regulation by host of viral transcription; and positive regulation of transcription by RNA polymerase II. Located in chromosome; granular component; and nucleoplasm. [provided by Alliance of Genome Resources, Apr 2022]

RRP1B links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.40763158).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_015056.3. 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
	RRP1B	NM_015056.3	MANE Select	c.641G>T	p.Arg214Leu	missense	Exon 8 of 16	NP_055871.1	Q14684-1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	RRP1B	ENST00000340648.6	TSL:1 MANE Select	c.641G>T	p.Arg214Leu	missense	Exon 8 of 16	ENSP00000339145.4	Q14684-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1461836

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

727218

show subpopulations

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR)

AF:

0.00

AC:

AN:

33476

American (AMR)

AF:

0.00

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26134

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.00

AC:

AN:

86252

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53420

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5736

European-Non Finnish (NFE)

AF:

8.99e-7

AC:

AN:

1112004

Other (OTH)

AF:

0.00

AC:

AN:

60390

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.375

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.19

BayesDel_addAF

Benign

-0.14

BayesDel_noAF

Benign

-0.43

CADD

Benign

(source)

DANN

Uncertain

0.99

DEOGEN2

Benign

0.31

Eigen

Benign

-0.59

Eigen_PC

Benign

-0.72

FATHMM_MKL

Benign

0.14

LIST_S2

Benign

0.77

M_CAP

Benign

0.021

MetaRNN

Benign

0.41

MetaSVM

Benign

-0.98

MutationAssessor

Uncertain

2.3

PhyloP100

0.30

PrimateAI

Benign

0.33

PROVEAN

Pathogenic

-4.8

REVEL

Benign

0.059

Sift4G

Benign

0.14

Polyphen

0.56

Vest4

0.56

MutPred

0.55

Loss of catalytic residue at R214 (P = 0.0997)

MVP

0.50

MPC

0.91

ClinPred

0.98

GERP RS

0.50

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.59

gMVP

0.33

Mutation Taster

=92/8

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over