NM_005518.4:c.*6-16T>C

Variant names:

• chr1-119748857-A-G
• rs12096684
• NM_005518.4:c.*6-16T>C

Variant summary

Our verdict is Benign. The variant received -20 ACMG points: 0P and 20B. BP4_Strong BP6_Very_Strong BA1

The NM_005518.4(HMGCS2):​c.*6-16T>C variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0243 in 152,294 control chromosomes in the GnomAD database, including 144 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

• Frequency:
  • Genomes: 𝑓 0.024 (144 hom., cov: 32)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: HMGCS2 NM_005518.4 intron
• Clinical Significance: Benign criteria provided, multiple submitters, no conflicts B:2
• Conservation: PhyloP100: -0.697
• Publications: 3 publications found

Genes affected

HMGCS2 (HGNC:5008): (3-hydroxy-3-methylglutaryl-CoA synthase 2) The protein encoded by this gene belongs to the HMG-CoA synthase family. It is a mitochondrial enzyme that catalyzes the first reaction of ketogenesis, a metabolic pathway that provides lipid-derived energy for various organs during times of carbohydrate deprivation, such as fasting. Mutations in this gene are associated with HMG-CoA synthase deficiency. Alternatively spliced transcript variants encoding different isoforms have been found for this gene.[provided by RefSeq, Oct 2009]

HMGCS2 Gene-Disease associations (from GenCC):

• 3-hydroxy-3-methylglutaryl-CoA synthase deficiency

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: ClinGen, Labcorp Genetics (formerly Invitae), G2P, Orphanet

ACMG classification

Our verdict: Benign. The variant received -20 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.91).
• BP6: Variant 1-119748857-A-G is Benign according to our data. Variant chr1-119748857-A-G is described in ClinVar as Benign. ClinVar VariationId is 137555.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.0807 is higher than 0.05.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_005518.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	HMGCS2	NM_005518.4	MANE Select	c.*6-16T>C		intron	N/A	NP_005509.1	P54868-1
	HMGCS2	NM_001166107.1		c.*6-16T>C		intron	N/A	NP_001159579.1	P54868-2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	HMGCS2	ENST00000369406.8	TSL:1 MANE Select	c.*6-16T>C		intron	N/A	ENSP00000358414.3	P54868-1
	HMGCS2	ENST00000886230.1		c.*215T>C		3_prime_UTR	Exon 10 of 10	ENSP00000556289.1
	HMGCS2	ENST00000886236.1		c.*1945T>C		3_prime_UTR	Exon 9 of 9	ENSP00000556295.1

Frequencies

GnomAD3 genomes AF: 0.0242 AC: 3681 AN: 152176 Hom.: 143 Cov.: 32

Gnomad AFR AF: 0.0829

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0112

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.000192

Gnomad SAS AF: 0.000414

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00949

Gnomad NFE AF: 0.000426

Gnomad OTH AF: 0.0192

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 30 Hom.: 0 Cov.: 0 AF XY: 0.00 AC XY: 0 AN XY: 28

African (AFR) AC: 0 AN: 0

American (AMR) AC: 0 AN: 0

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 2

East Asian (EAS) AF: 0.00 AC: 0 AN: 2

South Asian (SAS) AC: 0 AN: 0

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 2

Middle Eastern (MID) AC: 0 AN: 0

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 18

Other (OTH) AF: 0.00 AC: 0 AN: 6

GnomAD4 genome AF: 0.0243 AC: 3694 AN: 152294 Hom.: 144 Cov.: 32 AF XY: 0.0231 AC XY: 1720 AN XY: 74490

African (AFR) AF: 0.0830 AC: 3449 AN: 41554

American (AMR) AF: 0.0112 AC: 171 AN: 15310

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3468

East Asian (EAS) AF: 0.000193 AC: 1 AN: 5184

South Asian (SAS) AF: 0.000207 AC: 1 AN: 4830

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10624

Middle Eastern (MID) AF: 0.0102 AC: 3 AN: 294

European-Non Finnish (NFE) AF: 0.000426 AC: 29 AN: 68014

Other (OTH) AF: 0.0190 AC: 40 AN: 2104

Alfa AF: 0.0104 Hom.: 60

Bravo AF: 0.0274

Asia WGS AF: 0.00866 AC: 31 AN: 3478

ClinVar

ClinVar submissions

Significance: Benign

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
-	-	1	not provided (1)
-	-	1	not specified (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.91
CADD	Benign	0.97
DANN	Benign	0.59
PhyloP100		-0.70
Mutation Taster		=100/0	polymorphism (auto)

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

Other links and lift over

dbSNP: rs12096684; hg19: chr1-120291480;