Genetic Variant CLYBL:p.Arg259Leu (chr13-99866381-G-T) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_206808.5(CLYBL):c.776G>T(p.Arg259Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000657 in 152,160 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/22 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. R259Q) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)

Consequence

CLYBL
NM_206808.5 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 2.69

Variant links:

Genes affected

CLYBL (HGNC:18355): (citramalyl-CoA lyase) Enables (S)-citramalyl-CoA lyase activity; magnesium ion binding activity; and malate synthase activity. Involved in protein homotrimerization and regulation of cobalamin metabolic process. Predicted to be located in mitochondrion. Predicted to be integral component of membrane. [provided by Alliance of Genome Resources, Apr 2022]

CLYBL links:

ENSG00000286757 (HGNC:):

ENSG00000286757 links:

CLYBL-AS3 (HGNC:56191): (CLYBL antisense RNA 3)

CLYBL-AS3 links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.15760547).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CLYBL	NM_206808.5 link	c.776G>T	p.Arg259Leu	missense_variant	Exon 6 of 9	ENST00000339105.9	NP_996531.1	Q8N0X4-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CLYBL	ENST00000339105.9 link	c.776G>T	p.Arg259Leu	missense_variant	Exon 6 of 9	1	NM_206808.5	ENSP00000342991.4		Q8N0X4-1

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152160

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.00

Gnomad OTH

AF:

0.00

GnomAD4 exome

Cov.:

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152160

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74336

show subpopulations

African (AFR)

AF:

0.0000241

AC:

AN:

41436

American (AMR)

AF:

0.00

AC:

AN:

15272

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3468

East Asian (EAS)

AF:

0.00

AC:

AN:

5198

South Asian (SAS)

AF:

0.00

AC:

AN:

4820

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10614

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

68036

Other (OTH)

AF:

0.00

AC:

AN:

2088

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.475

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.00

Hom.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.18

BayesDel_addAF

Benign

-0.0099

BayesDel_noAF

Benign

-0.25

CADD

Benign

(source)

DANN

Benign

0.84

DEOGEN2

Benign

0.054

T;.;T;T

Eigen

Benign

-0.85

Eigen_PC

Benign

-0.76

FATHMM_MKL

Uncertain

0.86

LIST_S2

Uncertain

0.96

.;D;D;D

M_CAP

Benign

0.014

MetaRNN

Benign

0.16

T;T;T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

1.2

L;.;L;.

PhyloP100

2.7

PrimateAI

Benign

0.45

PROVEAN

Benign

-0.80

.;N;N;N

REVEL

Benign

0.25

Sift

Benign

0.35

.;T;T;T

Sift4G

Benign

0.35

T;T;T;T

Polyphen

0.0010

B;.;B;.

Vest4

0.73

MutPred

0.52

Gain of catalytic residue at M264 (P = 0.006);.;Gain of catalytic residue at M264 (P = 0.006);.;

MVP

0.43

ClinPred

0.29

GERP RS

2.0

PromoterAI

-0.060

Neutral

(source)

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.45

gMVP

0.83

Mutation Taster

=62/38

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Computational scores

Splicing

Publications

Other links and lift over