Genetic Variant RIBC1:p.Arg109Cys (chrX-53428408-C-T) – ACMG Classification: Likely_benign (-4 pts)

Variant summary

Our verdict is Likely benign. Variant got -4 ACMG points: 0P and 4B. BS2

The NM_001031745.5(RIBC1):c.325C>T(p.Arg109Cys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000182 in 1,208,990 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 9 hemizygotes in GnomAD. In-silico tool predicts 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. R109H) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000054 ( 0 hom., 0 hem., cov: 23)

Exomes 𝑓: 0.000015 ( 0 hom. 9 hem. )

Consequence

RIBC1
NM_001031745.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -0.595

Variant links:

Genes affected

RIBC1 (HGNC:26537): (RIB43A domain with coiled-coils 1)

RIBC1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -4 ACMG points.

BS2

High Hemizygotes in GnomAdExome4 at 9 gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
RIBC1	NM_001031745.5 link	c.325C>T	p.Arg109Cys	missense_variant	Exon 5 of 8	ENST00000375327.6	NP_001026915.1	Q8N443-1A0A024R9X7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
RIBC1	ENST00000375327.6 link	c.325C>T	p.Arg109Cys	missense_variant	Exon 5 of 8	1	NM_001031745.5	ENSP00000364476.3		Q8N443-1

Frequencies

GnomAD3 genomes

AF:

0.0000537

AC:

AN:

111684

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

33880

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000381

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000376

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000164

AC:

AN:

182585

Hom.:

AF XY:

0.0000298

AC XY:

AN XY:

67055

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:

0.0000529

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000245

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000146

AC:

AN:

1097306

Hom.:

Cov.:

AF XY:

0.0000248

AC XY:

AN XY:

362674

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.000114

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000185

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000131

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000537

AC:

AN:

111684

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

33880

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.000381

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000376

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.000110

ExAC

AF:

0.0000330

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Aug 20, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.325C>T (p.R109C) alteration is located in exon 5 (coding exon 3) of the RIBC1 gene. This alteration results from a C to T substitution at nucleotide position 325, causing the arginine (R) at amino acid position 109 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

0.10

BayesDel_addAF

Benign

-0.37

BayesDel_noAF

Benign

-0.62

CADD

Benign

DANN

Benign

0.95

DEOGEN2

Benign

0.26

T;.;T

FATHMM_MKL

Benign

0.012

LIST_S2

Benign

0.58

T;T;T

M_CAP

Benign

0.012

MetaRNN

Benign

0.30

T;T;T

MetaSVM

Benign

-1.1

MutationAssessor

Benign

1.7

.;L;L

PrimateAI

Benign

0.19

PROVEAN

Pathogenic

-5.8

D;D;D

REVEL

Benign

0.12

Sift

Benign

0.13

T;T;T

Sift4G

Benign

0.15

T;T;T

Polyphen

0.022, 0.45

.;B;B

Vest4

0.075, 0.097

MutPred

0.75

Loss of MoRF binding (P = 0.0068);Loss of MoRF binding (P = 0.0068);Loss of MoRF binding (P = 0.0068);

MVP

0.093

MPC

0.35

ClinPred

0.11

GERP RS

-2.4

Varity_R

0.18

gMVP

0.40

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.41

Details are displayed if max score is > 0.2

DS_DG_spliceai

0.41

Position offset: -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