rs121917821

Variant names:

• chr11-116790814-G-A
• rs121917821
• NM_001371904.1:c.415C>T

Your query was ambiguous. Multiple possible variants found:

• chr11-116790814-G-A
• chr11-116790814-G-T

Variant summary

Our verdict is Likely pathogenic. The variant received 7 ACMG points: 7P and 0B. PVS1_Strong PM2 PP5

The NM_001371904.1(APOA5):​c.415C>T​(p.Gln139*) variant causes a stop gained change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000205 in 1,461,454 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (no stars).

• Frequency:
  • Genomes: not found (cov: 34)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: APOA5 NM_001371904.1 stop_gained
• Clinical Significance: Pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 2.70
• Publications: 22 publications found

Genes affected

APOA5 (HGNC:17288): (apolipoprotein A5) The protein encoded by this gene is an apolipoprotein that plays an important role in regulating the plasma triglyceride levels, a major risk factor for coronary artery disease. It is a component of high density lipoprotein and is highly similar to a rat protein that is upregulated in response to liver injury. Mutations in this gene have been associated with hypertriglyceridemia and hyperlipoproteinemia type 5. This gene is located proximal to the apolipoprotein gene cluster on chromosome 11q23. Alternatively spliced transcript variants encoding the same protein have been identified. [provided by RefSeq, Oct 2009]

APOA5 Gene-Disease associations (from GenCC):

• hypertriglyceridemia 1

  Inheritance: AD Classification: DEFINITIVE Submitted by: G2P
• hyperlipoproteinemia type V

  Inheritance: AD, SD Classification: STRONG Submitted by: Genomics England PanelApp, Labcorp Genetics (formerly Invitae), Ambry Genetics

ACMG classification

Our verdict: Likely_pathogenic. The variant received 7 ACMG points.

• PVS1: Loss of function variant, product does not undergo nonsense mediated mRNA decay. Variant is located in the 3'-most exon, not predicted to undergo nonsense mediated mRNA decay. There are 19 pathogenic variants in the truncated region.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 11-116790814-G-A is Pathogenic according to our data. Variant chr11-116790814-G-A is described in ClinVar as Pathogenic. ClinVar VariationId is 4404.Status of the report is no_assertion_criteria_provided, 0 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001371904.1. 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
	APOA5	NM_001371904.1	MANE Select	c.415C>T	p.Gln139*	stop_gained	Exon 3 of 3	NP_001358833.1	Q6Q788
	APOA5	NM_001166598.2		c.415C>T	p.Gln139*	stop_gained	Exon 4 of 4	NP_001160070.1	A0A0B4RUS7
	APOA5	NM_052968.5		c.415C>T	p.Gln139*	stop_gained	Exon 4 of 4	NP_443200.2	Q6Q788

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	APOA5	ENST00000227665.9	TSL:1 MANE Select	c.415C>T	p.Gln139*	stop_gained	Exon 3 of 3	ENSP00000227665.4	Q6Q788
	APOA5	ENST00000433069.2	TSL:1	c.415C>T	p.Gln139*	stop_gained	Exon 4 of 4	ENSP00000399701.2	Q6Q788
	APOA5	ENST00000673688.1		c.499C>T	p.Gln167*	stop_gained	Exon 3 of 3	ENSP00000501141.1	A0A669KB69

Frequencies

GnomAD3 genomes Cov.: 34

GnomAD2 exomes AF: 0.00000398 AC: 1 AN: 251016 AF XY: 0.00000736

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: 0.00000881

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000205 AC: 3 AN: 1461454 Hom.: 0 Cov.: 34 AF XY: 0.00 AC XY: 0 AN XY: 727050

African (AFR) AF: 0.00 AC: 0 AN: 33480

American (AMR) AF: 0.00 AC: 0 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26134

East Asian (EAS) AF: 0.00 AC: 0 AN: 39700

South Asian (SAS) AF: 0.00 AC: 0 AN: 86258

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53000

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.00000270 AC: 3 AN: 1111998

Other (OTH) AF: 0.00 AC: 0 AN: 60392

GnomAD4 genome Cov.: 34

ClinVar

ClinVar submissions

Significance: Pathogenic

Revision: no assertion criteria provided

Pathogenic	VUS	Benign	Condition
1	-	-	Familial type 5 hyperlipoproteinemia (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.60	D
BayesDel_noAF	Pathogenic	0.51
CADD	Pathogenic	37
DANN	Uncertain	1.0
Eigen	Pathogenic	0.97
Eigen_PC	Pathogenic	0.80
FATHMM_MKL	Uncertain	0.84	D
PhyloP100		2.7
Vest4		0.92
GERP RS		4.0
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Mutation Taster		=26/174	disease causing (ClinVar)

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

Other links and lift over

dbSNP: rs121917821; hg19: chr11-116661530;