2-27827722-C-T

Position:

chr2-27827722-C-T

Variant summary

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

The NM_022128.3(RBKS):c.640G>A(p.Ala214Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000131 in 1,608,250 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00016 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00013 ( 0 hom. )

Consequence

RBKS
NM_022128.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 3.03

Variant links:

Genes affected

RBKS (HGNC:30325): (ribokinase) This gene encodes a member of the carbohydrate kinase PfkB family. The encoded protein phosphorylates ribose to form ribose-5-phosphate in the presence of ATP and magnesium as a first step in ribose metabolism. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Dec 2013]

RBKS links:

MRPL33 (HGNC:14487): (mitochondrial ribosomal protein L33) Mammalian mitochondrial ribosomal proteins are encoded by nuclear genes and help in protein synthesis within the mitochondrion. Mitochondrial ribosomes (mitoribosomes) consist of a small 28S subunit and a large 39S subunit. They have an estimated 75% protein to rRNA composition compared to prokaryotic ribosomes, where this ratio is reversed. Another difference between mammalian mitoribosomes and prokaryotic ribosomes is that the latter contain a 5S rRNA. Among different species, the proteins comprising the mitoribosome differ greatly in sequence, and sometimes in biochemical properties, which prevents easy recognition by sequence homology. This gene encodes a 39S subunit protein. Alternatively spliced transcript variants encoding different isoforms have been described. [provided by RefSeq, Jul 2008]

MRPL33 links:

Genome browser will be placed here

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=0.043446004).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
RBKS	NM_022128.3 link	c.640G>A	p.Ala214Thr	missense_variant	7/8	ENST00000302188.8	NP_071411.1	Q9H477-1
RBKS	NM_001287580.2 link	c.439G>A	p.Ala147Thr	missense_variant	8/9		NP_001274509.1	Q9H477

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
RBKS	ENST00000302188.8 link	c.640G>A	p.Ala214Thr	missense_variant	7/8	1	NM_022128.3	ENSP00000306817.3		Q9H477-1

Frequencies

GnomAD3 genomes

AF:

0.000158

AC:

AN:

152066

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000242

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000131

Gnomad ASJ

AF:

0.000865

Gnomad EAS

AF:

0.000193

Gnomad SAS

AF:

0.000416

Gnomad FIN

AF:

0.0000943

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000206

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000181

AC:

AN:

243712

Hom.:

AF XY:

0.000204

AC XY:

AN XY:

132160

show subpopulations

Gnomad AFR exome

AF:

0.0000626

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.000103

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.000502

Gnomad FIN exome

AF:

0.000140

Gnomad NFE exome

AF:

0.000207

Gnomad OTH exome

AF:

0.000171

GnomAD4 exome

AF:

0.000128

AC:

186

AN:

1456184

Hom.:

Cov.:

AF XY:

0.000146

AC XY:

106

AN XY:

724732

show subpopulations

Gnomad4 AFR exome

AF:

0.0000304

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.000309

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.000490

Gnomad4 FIN exome

AF:

0.0000750

Gnomad4 NFE exome

AF:

0.000111

Gnomad4 OTH exome

AF:

0.000117

GnomAD4 genome

AF:

0.000158

AC:

AN:

152066

Hom.:

Cov.:

AF XY:

0.000175

AC XY:

AN XY:

74286

show subpopulations

Gnomad4 AFR

AF:

0.0000242

Gnomad4 AMR

AF:

0.000131

Gnomad4 ASJ

AF:

0.000865

Gnomad4 EAS

AF:

0.000193

Gnomad4 SAS

AF:

0.000416

Gnomad4 FIN

AF:

0.0000943

Gnomad4 NFE

AF:

0.000206

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000195

Hom.:

Bravo

AF:

0.000110

TwinsUK

AF:

0.000270

AC:

ALSPAC

AF:

0.00

AC:

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000233

AC:

ExAC

AF:

0.000165

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Oct 20, 2024

The c.640G>A (p.A214T) alteration is located in exon 7 (coding exon 7) of the RBKS gene. This alteration results from a G to A substitution at nucleotide position 640, causing the alanine (A) at amino acid position 214 to be replaced by a threonine (T). 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

0.088

BayesDel_addAF

Benign

-0.36

BayesDel_noAF

Benign

-0.42

CADD

Benign

DANN

Benign

0.68

DEOGEN2

Benign

0.32

Eigen

Benign

-0.36

Eigen_PC

Benign

-0.33

FATHMM_MKL

Benign

0.71

LIST_S2

Benign

0.52

M_CAP

Benign

0.026

MetaRNN

Benign

0.043

MetaSVM

Benign

-1.0

MutationAssessor

Benign

0.065

PrimateAI

Benign

0.25

PROVEAN

Benign

-0.22

REVEL

Benign

0.11

Sift

Benign

0.61

Sift4G

Benign

0.34

Polyphen

0.0060

Vest4

0.063

MVP

0.71

MPC

0.034

ClinPred

0.021

GERP RS

4.5

Varity_R

0.067

gMVP

0.46

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

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