chr6-159778740-A-G

Position:

• chr6-159778740-A-G

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2 BP4_Moderate BP6_Moderate

The NM_005891.3(ACAT2):​c.1105A>G​(p.Thr369Ala) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000274 in 1,461,888 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★).

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000027 (0 hom.)
• Consequence: ACAT2 NM_005891.3 missense
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: 2.25

Genes affected

ACAT2 (HGNC:94): (acetyl-CoA acetyltransferase 2) The product of this gene is an enzyme involved in lipid metabolism, and it encodes cytosolic acetoacetyl-CoA thiolase. This gene shows complementary overlapping with the 3-prime region of the TCP1 gene in both mouse and human. These genes are encoded on opposite strands of DNA, as well as in opposite transcriptional orientation. Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Dec 2014]

TCP1 (HGNC:11655): (t-complex 1) The protein encoded by this gene is a molecular chaperone that is a member of the chaperonin containing TCP1 complex (CCT), also known as the TCP1 ring complex (TRiC). This complex consists of two identical stacked rings, each containing eight different proteins. Unfolded polypeptides enter the central cavity of the complex and are folded in an ATP-dependent manner. The complex folds various proteins, including actin and tubulin. Alternate transcriptional splice variants of this gene, encoding different isoforms, have been characterized. In addition, three pseudogenes that appear to be derived from this gene have been found. [provided by RefSeq, Jun 2010]

ACMG classification

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=0.09806764).
• BP6: Variant 6-159778740-A-G is Benign according to our data. Variant chr6-159778740-A-G is described in ClinVar as [Likely_benign]. Clinvar id is 2491863.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
ACAT2	NM_005891.3	c.1105A>G	p.Thr369Ala	missense_variant	9/9	ENST00000367048.5
TCP1	NM_030752.3	c.*305T>C		3_prime_UTR_variant	12/12	ENST00000321394.12
ACAT2	NM_001303253.1	c.1192A>G	p.Thr398Ala	missense_variant	9/9
TCP1	NM_001008897.2	c.*305T>C		3_prime_UTR_variant	11/11

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ACAT2	ENST00000367048.5	c.1105A>G	p.Thr369Ala	missense_variant	9/9	1	NM_005891.3	P1
TCP1	ENST00000321394.12	c.*305T>C		3_prime_UTR_variant	12/12	1	NM_030752.3	P1
ACAT2	ENST00000472052.1	n.1335A>G		non_coding_transcript_exon_variant	4/4	2

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD3 exomes AF: 0.00000398 AC: 1 AN: 251026 Hom.: 0 AF XY: 0.00000737 AC XY: 1 AN XY: 135746

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: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00000883

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000274 AC: 4 AN: 1461888 Hom.: 0 Cov.: 34 AF XY: 0.00000138 AC XY: 1 AN XY: 727244

Gnomad4 AFR exome AF: 0.00

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: 0.00000360

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

EpiCase AF: 0.0000545

EpiControl AF: 0.00

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Mar 01, 2023

This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.075
BayesDel_addAF	Benign	-0.17	T
BayesDel_noAF	Benign	-0.48
CADD	Benign	1.4
DANN	Benign	0.83
DEOGEN2	Benign	0.18	T
Eigen	Benign	-0.91
Eigen_PC	Benign	-0.70
FATHMM_MKL	Benign	0.67	D
LIST_S2	Benign	0.70	T
M_CAP	Benign	0.024	T
MetaRNN	Benign	0.098	T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	-1.5	N
MutationTaster	Benign	0.81	D;N;D
PrimateAI	Benign	0.39	T
PROVEAN	Benign	0.56	N
REVEL	Benign	0.20
Sift	Benign	0.33	T
Sift4G	Benign	0.27	T
Polyphen		0.0010	B
Vest4		0.013
MVP		0.77
MPC		0.12
ClinPred		0.060	T
GERP RS		-0.64
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.8
Varity_R		0.15
gMVP		0.59

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

Other links and lift over

dbSNP: rs1240374740; hg19: chr6-160199772;