11-116790148-T-G

Variant summary

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

The NM_001371904.1(APOA5):c.1081A>C(p.Ser361Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. 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 Uncertain significance (★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: APOA5 NM_001371904.1 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -0.132

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]

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=0.118083835).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
APOA5	NM_001371904.1	c.1081A>C	p.Ser361Arg	missense_variant	3/3	ENST00000227665.9
APOA5	NM_001166598.2	c.1081A>C	p.Ser361Arg	missense_variant	4/4
APOA5	NM_052968.5	c.1081A>C	p.Ser361Arg	missense_variant	4/4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
APOA5	ENST00000227665.9	c.1081A>C	p.Ser361Arg	missense_variant	3/3	1	NM_001371904.1	P1
APOA5	ENST00000433069.2	c.1081A>C	p.Ser361Arg	missense_variant	4/4	1		P1
APOA5	ENST00000673688.1	c.1165A>C	p.Ser389Arg	missense_variant	3/3
APOA5	ENST00000542499.5	c.1081A>C	p.Ser361Arg	missense_variant	4/4	5		P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 34

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Familial type 5 hyperlipoproteinemia;C5444012:Hypertriglyceridemia 1 Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

New York Genome Center

Aug 30, 2021

The c.1081A>C, p.Ser361Arg missense variant has not been reported in individual with APOA5-related disorders. This variant is absent from the gnomAD v3.1.1 database suggesting it is not a common benign variant in the populations represented in this database and in silico tools predict a conflicting interpretation of pathogenicity. Based on the available evidence, the variant c.1081A>C, p.Ser361Arg in the APOA5 gene is classified as a Variant of UncertainSignificance. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.14
BayesDel_addAF	Benign	-0.19	T
BayesDel_noAF	Benign	-0.51
Cadd	Benign	6.5
Dann	Benign	0.95
DEOGEN2	Benign	0.19	T;T
Eigen	Benign	-0.86
Eigen_PC	Benign	-0.95
FATHMM_MKL	Benign	0.095	N
M_CAP	Benign	0.026	D
MetaRNN	Benign	0.12	T;T
MetaSVM	Benign	-0.99	T
MutationAssessor	Benign	1.7	L;L
MutationTaster	Benign	1.0	N;N
PrimateAI	Benign	0.34	T
PROVEAN	Benign	-0.51	N;N
REVEL	Benign	0.069
Sift	Uncertain	0.021	D;D
Sift4G	Benign	0.17	T;T
Polyphen		0.61	P;P
Vest4		0.079
MutPred		0.22		Loss of glycosylation at S361 (P = 0.0049);Loss of glycosylation at S361 (P = 0.0049);
MVP		0.81
MPC		0.54
ClinPred		0.12	T
GERP RS		0.69
Varity_R		0.067
gMVP		0.28

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr11-116660864;