15-40953761-T-C

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 3P and 1B. PM2PP3BP4

The NM_024111.6(CHAC1):c.178T>C(p.Tyr60His) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000649 in 1,599,902 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 Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00043 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00067 ( 1 hom. )

Consequence

CHAC1
NM_024111.6 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 7.46

Variant links:

Genes affected

CHAC1 (HGNC:28680): (ChaC glutathione specific gamma-glutamylcyclotransferase 1) This gene encodes a member of the gamma-glutamylcyclotransferase family of proteins. The encoded protein has been shown to promote neuronal differentiation by deglycination of the Notch receptor, which prevents receptor maturation and inhibits Notch signaling. This protein may also play a role in the unfolded protein response, and in regulation of glutathione levels and oxidative balance in the cell. Elevated expression of this gene may indicate increased risk of cancer recurrence among breast and ovarian cancer patients. [provided by RefSeq, Sep 2016]

CHAC1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

Multiple lines of computational evidence support a deleterious effect 5: AlphaMissense, BayesDel_noAF, Cadd, Eigen, REVEL [when max_spliceai, MetaRNN, MutationTaster was below the threshold]

BP4

Computational evidence support a benign effect (MetaRNN=0.3894573).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CHAC1	NM_024111.6 linkuse as main transcript	c.178T>C	p.Tyr60His	missense_variant	1/3	ENST00000617768.5
CHAC1	NM_001142776.4 linkuse as main transcript	c.178T>C	p.Tyr60His	missense_variant	1/4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CHAC1	ENST00000617768.5 linkuse as main transcript	c.178T>C	p.Tyr60His	missense_variant	1/3	1	NM_024111.6	P1	Q9BUX1-1
CHAC1	ENST00000444189.7 linkuse as main transcript	c.178T>C	p.Tyr60His	missense_variant	1/4	1			Q9BUX1-2

Frequencies

GnomAD3 genomes

AF:

0.000434

AC:

AN:

152156

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000169

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000916

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:

0.000661

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000470

AC:

109

AN:

231994

Hom.:

AF XY:

0.000483

AC XY:

AN XY:

128466

show subpopulations

Gnomad AFR exome

AF:

0.000143

Gnomad AMR exome

AF:

0.000790

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.0000789

Gnomad NFE exome

AF:

0.000708

Gnomad OTH exome

AF:

0.000516

GnomAD4 exome

AF:

0.000672

AC:

973

AN:

1447628

Hom.:

Cov.:

AF XY:

0.000626

AC XY:

451

AN XY:

720576

show subpopulations

Gnomad4 AFR exome

AF:

0.000179

Gnomad4 AMR exome

AF:

0.000784

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.0000498

Gnomad4 NFE exome

AF:

0.000814

Gnomad4 OTH exome

AF:

0.000415

GnomAD4 genome

AF:

0.000433

AC:

AN:

152274

Hom.:

Cov.:

AF XY:

0.000430

AC XY:

AN XY:

74466

show subpopulations

Gnomad4 AFR

AF:

0.000168

Gnomad4 AMR

AF:

0.000915

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000662

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000694

Hom.:

Bravo

AF:

0.000597

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000355

AC:

ExAC

AF:

0.000466

AC:

EpiCase

AF:

0.000709

EpiControl

AF:

0.000652

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

Sep 26, 2022

The c.304T>C (p.Y102H) alteration is located in exon 1 (coding exon 1) of the CHAC1 gene. This alteration results from a T to C substitution at nucleotide position 304, causing the tyrosine (Y) at amino acid position 102 to be replaced by a histidine (H). 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

Pathogenic

0.86

BayesDel_addAF

Uncertain

0.055

BayesDel_noAF

Pathogenic

0.22

Cadd

Pathogenic

Dann

Uncertain

1.0

Eigen

Pathogenic

0.83

Eigen_PC

Pathogenic

0.78

FATHMM_MKL

Uncertain

0.90

LIST_S2

Uncertain

0.95

D;D;.;.

M_CAP

Uncertain

0.25

MetaRNN

Benign

0.39

T;T;T;T

MetaSVM

Uncertain

-0.11

MutationTaster

Benign

1.0

D;D

PrimateAI

Uncertain

0.77

REVEL

Pathogenic

0.66

Vest4

0.87

MVP

0.89

MPC

1.7

ClinPred

0.15

GERP RS

5.4

Varity_R

0.41

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