Genetic Variant CHCHD6:p.Ala167Thr (chr3-126914683-G-A) – 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_032343.3(CHCHD6):c.499G>A(p.Ala167Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000108 in 1,574,210 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000039 ( 0 hom., cov: 33)

Exomes 𝑓: 0.0000077 ( 0 hom. )

Consequence

CHCHD6
NM_032343.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 1.84

Variant links:

Genes affected

CHCHD6 (HGNC:28184): (coiled-coil-helix-coiled-coil-helix domain containing 6) Involved in cellular response to DNA damage stimulus and cristae formation. Located in cytosol and mitochondrial inner membrane. Part of MICOS complex. [provided by Alliance of Genome Resources, Apr 2022]

CHCHD6 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=0.12317255).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CHCHD6	NM_032343.3 link	c.499G>A	p.Ala167Thr	missense_variant	Exon 6 of 8	ENST00000290913.8	NP_115719.1	Q9BRQ6
CHCHD6	NM_001320610.2 link	c.502G>A	p.Ala168Thr	missense_variant	Exon 6 of 8		NP_001307539.1	Q9BRQ6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CHCHD6	ENST00000290913.8 link	c.499G>A	p.Ala167Thr	missense_variant	Exon 6 of 8	1	NM_032343.3	ENSP00000290913.3		Q9BRQ6

Frequencies

GnomAD3 genomes

AF:

0.0000394

AC:

AN:

152212

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:

0.0000735

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.00000796

AC:

AN:

251378

AF XY:

0.00000736

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 FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000176

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000774

AC:

AN:

1421998

Hom.:

Cov.:

AF XY:

0.00000986

AC XY:

AN XY:

710212

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

32682

American (AMR)

AF:

0.00

AC:

AN:

44676

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25886

East Asian (EAS)

AF:

0.00

AC:

AN:

39542

South Asian (SAS)

AF:

0.00

AC:

AN:

85398

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53370

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5688

European-Non Finnish (NFE)

AF:

0.00000930

AC:

AN:

1075640

Other (OTH)

AF:

0.0000169

AC:

AN:

59116

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.484

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.0000394

AC:

AN:

152212

Hom.:

Cov.:

AF XY:

0.0000672

AC XY:

AN XY:

74358

show subpopulations

African (AFR)

AF:

0.0000241

AC:

AN:

41460

American (AMR)

AF:

0.00

AC:

AN:

15284

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3468

East Asian (EAS)

AF:

0.00

AC:

AN:

5200

South Asian (SAS)

AF:

0.00

AC:

AN:

4832

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10614

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.0000735

AC:

AN:

68034

Other (OTH)

AF:

0.00

AC:

AN:

2092

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.442

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.0000282

Hom.:

Bravo

AF:

0.0000340

EpiCase

AF:

0.000164

EpiControl

AF:

0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Apr 08, 2022

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.499G>A (p.A167T) alteration is located in exon 6 (coding exon 6) of the CHCHD6 gene. This alteration results from a G to A substitution at nucleotide position 499, causing the alanine (A) at amino acid position 167 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

0.084

BayesDel_addAF

Benign

-0.18

BayesDel_noAF

Benign

-0.48

CADD

Benign

(source)

DANN

Benign

0.95

DEOGEN2

Benign

0.0050

T;.

Eigen

Benign

-0.095

Eigen_PC

Benign

-0.10

FATHMM_MKL

Uncertain

0.82

LIST_S2

Benign

0.78

T;T

M_CAP

Benign

0.025

MetaRNN

Benign

0.12

T;T

MetaSVM

Benign

-0.95

PhyloP100

1.8

PrimateAI

Benign

0.30

PROVEAN

Benign

-1.7

N;N

REVEL

Benign

0.025

Sift

Benign

0.49

T;T

Sift4G

Benign

0.43

T;T

Polyphen

0.13

B;.

Vest4

0.21

MutPred

0.33

Gain of phosphorylation at A167 (P = 0.032);.;

MVP

0.40

MPC

0.25

ClinPred

0.43

GERP RS

3.5

Varity_R

0.10

gMVP

0.11

Mutation Taster

=75/25

polymorphism

(source)

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

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3-126914683-G-A

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over