chr3-15560869-A-G

Position:

• chr3-15560869-A-G

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_012260.4(HACL1):​c.1733T>C​(p.Met578Thr) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000207 in 1,451,524 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: not found (cov: 32)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: HACL1 NM_012260.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.49

Genes affected

HACL1 (HGNC:17856): (2-hydroxyacyl-CoA lyase 1) Enables several functions, including 2-hydroxy-3-methylhexadecanoyl-CoA lyase activity; ATP binding activity; and cation binding activity. Involved in fatty acid alpha-oxidation; phytanic acid metabolic process; and protein targeting to peroxisome. Located in nucleoplasm and peroxisome. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

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=0.24700263).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
HACL1	NM_012260.4	c.1733T>C	p.Met578Thr	missense_variant	17/17	ENST00000321169.10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
HACL1	ENST00000321169.10	c.1733T>C	p.Met578Thr	missense_variant	17/17	1	NM_012260.4	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000207 AC: 3 AN: 1451524 Hom.: 0 Cov.: 27 AF XY: 0.00000277 AC XY: 2 AN XY: 722586

Gnomad4 AFR exome AF: 0.0000906

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: 0.00

GnomAD4 genome Cov.: 32

Bravo AF: 0.00000756

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Feb 15, 2023

The c.1733T>C (p.M578T) alteration is located in exon 17 (coding exon 17) of the HACL1 gene. This alteration results from a T to C substitution at nucleotide position 1733, causing the methionine (M) at amino acid position 578 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	0.25
BayesDel_addAF	Benign	-0.092	T
BayesDel_noAF	Benign	-0.37
CADD	Benign	23
DANN	Benign	0.93
DEOGEN2	Benign	0.36	T;.;.;.;.
Eigen	Benign	-0.14
Eigen_PC	Benign	-0.019
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.95	D;D;D;D;D
M_CAP	Benign	0.032	D
MetaRNN	Benign	0.25	T;T;T;T;T
MetaSVM	Benign	-0.80	T
MutationAssessor	Uncertain	2.2	M;.;.;.;.
MutationTaster	Benign	0.74	D;D;D;D;D
PrimateAI	Uncertain	0.56	T
PROVEAN	Uncertain	-3.3	D;D;D;D;D
REVEL	Benign	0.15
Sift	Uncertain	0.0010	D;D;D;D;D
Sift4G	Uncertain	0.0040	D;D;D;D;D
Polyphen		0.14	B;P;.;.;.
Vest4		0.38
MutPred		0.53		Loss of stability (P = 0.0077);.;.;.;.;
MVP		0.56
MPC		0.14
ClinPred		0.94	D
GERP RS		4.7
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.6
Varity_R		0.58
gMVP		0.53

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: rs1050458050; hg19: chr3-15602376;