6-158158343-G-C

Variant names:

Variant summary

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

The NM_032861.4(SERAC1):c.21C>G(p.Cys7Trp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000533 in 1,613,298 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.00029 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00056 ( 1 hom. )

Consequence

SERAC1
NM_032861.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications P:1U:5

Conservation

PhyloP100: 0.132

Variant links:

Genes affected

SERAC1 (HGNC:21061): (serine active site containing 1) The protein encoded by this gene is a phosphatidylglycerol remodeling protein found at the interface of mitochondria and endoplasmic reticula, where it mediates phospholipid exchange. The encoded protein plays a major role in mitochondrial function and intracellular cholesterol trafficking. Defects in this gene are a cause of 3-methylglutaconic aciduria with deafness, encephalopathy, and Leigh-like syndrome (MEGDEL). Two transcript variants, one protein-coding and the other non-protein coding, have been found for this gene. [provided by RefSeq, Aug 2012]

SERAC1 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=0.034682572).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SERAC1	NM_032861.4 link	c.21C>G	p.Cys7Trp	missense_variant	Exon 2 of 17	ENST00000647468.2	NP_116250.3	Q96JX3-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SERAC1	ENST00000647468.2 link	c.21C>G	p.Cys7Trp	missense_variant	Exon 2 of 17		NM_032861.4	ENSP00000496731.1		Q96JX3-1

Frequencies

GnomAD3 genomes

AF:

0.000289

AC:

AN:

152122

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:

0.00207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000397

Gnomad OTH

AF:

0.000956

GnomAD3 exomes

AF:

0.000330

AC:

AN:

251240

Hom.:

AF XY:

0.000493

AC XY:

AN XY:

135780

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:

0.00124

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000378

Gnomad OTH exome

AF:

0.000326

GnomAD4 exome

AF:

0.000558

AC:

816

AN:

1461058

Hom.:

Cov.:

AF XY:

0.000618

AC XY:

449

AN XY:

726880

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.0000447

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00165

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000570

Gnomad4 OTH exome

AF:

0.000464

GnomAD4 genome

AF:

0.000289

AC:

AN:

152240

Hom.:

Cov.:

AF XY:

0.000390

AC XY:

AN XY:

74442

show subpopulations

Gnomad4 AFR

AF:

0.000120

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00208

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000397

Gnomad4 OTH

AF:

0.000946

Alfa

AF:

0.000223

Hom.:

Bravo

AF:

0.000310

TwinsUK

AF:

0.00135

AC:

ALSPAC

AF:

0.000778

AC:

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000465

AC:

ExAC

AF:

0.000371

AC:

Asia WGS

AF:

0.000866

AC:

AN:

3478

EpiCase

AF:

0.000709

EpiControl

AF:

0.000771

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Pathogenic:1Uncertain:5

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

3-methylglutaconic aciduria with deafness, encephalopathy, and Leigh-like syndrome

Uncertain:4

May 05, 2020

Baylor Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant was determined to be of uncertain significance according to ACMG Guidelines, 2015 [PMID:25741868]. -

Oct 09, 2019

Revvity Omics, Revvity

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Jan 22, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces cysteine, which is neutral and slightly polar, with tryptophan, which is neutral and slightly polar, at codon 7 of the SERAC1 protein (p.Cys7Trp). This variant is present in population databases (rs139301835, gnomAD 0.1%), including at least one homozygous and/or hemizygous individual. This variant has not been reported in the literature in individuals affected with SERAC1-related conditions. ClinVar contains an entry for this variant (Variation ID: 215139). An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant is likely to be disruptive. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

May 28, 2019

Mendelics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

not provided

Pathogenic:1

May 02, 2014

GeneDx

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

p.Cys7Trp (TGC>TGG): c.21 C>G in exon 2 of the SERAC1 gene (NM_032861.3) A C7W variant that is likely pathogenic was identified in the SERAC1 gene. It has not been published as a mutation, nor has it been reported as a benign polymorphism to our knowledge. The C7W variant is a non-conservative amino acid substitution, which is likely to impact secondary protein structure as these residues differ in polarity, charge, size and/or other properties. This substitution occurs at a position that is highly conserved across species. In silico analysis predicts this variant is probably damaging to the protein structure/function. Therefore, this variant is a strong candidate for a pathogenic mutation, however the possibility that it is a benign variant cannot be excluded.The variant is found in MITONUC-MITOP panel(s). -

Inborn genetic diseases

Uncertain:1

May 05, 2022

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.21C>G (p.C7W) alteration is located in exon 2 (coding exon 1) of the SERAC1 gene. This alteration results from a C to G substitution at nucleotide position 21, causing the cysteine (C) at amino acid position 7 to be replaced by a tryptophan (W). 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

Uncertain

0.37

BayesDel_addAF

Benign

-0.26

BayesDel_noAF

Benign

-0.19

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Benign

0.017

T;T;.;.;.;.;.;.

Eigen

Uncertain

0.19

Eigen_PC

Benign

0.069

FATHMM_MKL

Benign

0.18

LIST_S2

Uncertain

0.89

.;D;T;D;D;D;D;D

M_CAP

Benign

0.0092

MetaRNN

Benign

0.035

T;T;T;T;T;T;T;T

MetaSVM

Benign

-0.90

MutationAssessor

Uncertain

2.5

M;M;.;.;.;.;.;M

PrimateAI

Uncertain

0.62

PROVEAN

Benign

-1.3

N;.;.;.;.;.;.;N

REVEL

Benign

0.28

Sift

Benign

0.068

T;.;.;.;.;.;.;D

Sift4G

Benign

0.11

T;.;.;.;.;.;.;T

Polyphen

1.0

D;D;.;.;.;.;.;.

Vest4

0.88

MVP

0.38

MPC

1.0

ClinPred

0.45

GERP RS

-0.095

Varity_R

0.27

gMVP

0.68

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.040

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