Genetic Variant CRLS1:p.Ala86Val (chr20-6006503-C-T) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_001323563.2(CRLS1):c.-139C>T variant causes a 5 prime UTR premature start codon gain change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000592 in 1,350,728 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000033 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000025 ( 0 hom. )

Consequence

CRLS1
NM_001323563.2 5_prime_UTR_premature_start_codon_gain

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 1.04

Variant links:

Genes affected

CRLS1 (HGNC:16148): (cardiolipin synthase 1) This gene encodes a member of the CDP-alcohol phosphatidyltransferase class-I family of proteins. The encoded enzyme catalyzes the synthesis of cardiolipin, a phospholipid component of mitochondrial membranes that is critical for mitochondrial function. [provided by RefSeq, Apr 2016]

CRLS1 links:

ENSG00000286235 (HGNC:):

ENSG00000286235 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.1048671).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CRLS1	NM_019095.6 link	c.257C>T	p.Ala86Val	missense_variant	Exon 1 of 7	ENST00000378863.9	NP_061968.1	Q9UJA2-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
CRLS1	ENST00000378863.9 link	c.257C>T	p.Ala86Val	missense_variant	Exon 1 of 7	1	NM_019095.6	ENSP00000368140.4	Q9UJA2-1
CRLS1	ENST00000452938.5 link	c.257C>T	p.Ala86Val	missense_variant	Exon 1 of 6	1		ENSP00000416770.1	Q6NTG3
ENSG00000286235	ENST00000652720.1 link	c.2431-3272C>T		intron_variant	Intron 18 of 23			ENSP00000498784.1	A0A494C100

Frequencies

GnomAD3 genomes

AF:

0.0000329

AC:

AN:

152012

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000121

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

AF:

0.00000250

AC:

AN:

1198716

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

584978

show subpopulations

Gnomad4 AFR exome

AF:

0.0000838

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.0000205

GnomAD4 genome

AF:

0.0000329

AC:

AN:

152012

Hom.:

Cov.:

AF XY:

0.0000404

AC XY:

AN XY:

74266

show subpopulations

Gnomad4 AFR

AF:

0.000121

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000529

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Mar 06, 2025

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.257C>T (p.A86V) alteration is located in exon 1 (coding exon 1) of the CRLS1 gene. This alteration results from a C to T substitution at nucleotide position 257, causing the alanine (A) at amino acid position 86 to be replaced by a valine (V). 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

0.12

BayesDel_addAF

Benign

-0.12

BayesDel_noAF

Benign

-0.41

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Benign

0.022

T;T

Eigen

Benign

-0.96

Eigen_PC

Benign

-0.98

FATHMM_MKL

Benign

0.10

LIST_S2

Benign

0.55

T;T

M_CAP

Benign

0.025

MetaRNN

Benign

0.10

T;T

MetaSVM

Benign

-1.0

MutationAssessor

Uncertain

2.0

M;.

PrimateAI

Uncertain

0.73

PROVEAN

Benign

0.66

N;N

REVEL

Benign

0.026

Sift

Benign

0.080

T;D

Sift4G

Benign

0.33

T;D

Polyphen

0.19

B;.

Vest4

0.23

MutPred

0.37

Gain of sheet (P = 0.0125);Gain of sheet (P = 0.0125);

MVP

0.38

MPC

0.13

ClinPred

0.12

GERP RS

2.9

Varity_R

0.037

gMVP

0.25

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