rs886039827
Positions:
Variant summary
Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2PP3_Moderate
The NM_000384.3(APOB):c.1580C>T(p.Ala527Val) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000205 in 1,461,876 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 Uncertain significance (★★).
Frequency
Genomes: not found (cov: 33)
Exomes 𝑓: 0.0000021 ( 0 hom. )
Consequence
APOB
NM_000384.3 missense
NM_000384.3 missense
Scores
10
5
1
Clinical Significance
Conservation
PhyloP100: 8.96
Genes affected
APOB (HGNC:603): (apolipoprotein B) This gene product is the main apolipoprotein of chylomicrons and low density lipoproteins (LDL), and is the ligand for the LDL receptor. It occurs in plasma as two main isoforms, apoB-48 and apoB-100: the former is synthesized exclusively in the gut and the latter in the liver. The intestinal and the hepatic forms of apoB are encoded by a single gene from a single, very long mRNA. The two isoforms share a common N-terminal sequence. The shorter apoB-48 protein is produced after RNA editing of the apoB-100 transcript at residue 2180 (CAA->UAA), resulting in the creation of a stop codon, and early translation termination. Mutations in this gene or its regulatory region cause hypobetalipoproteinemia, normotriglyceridemic hypobetalipoproteinemia, and hypercholesterolemia due to ligand-defective apoB, diseases affecting plasma cholesterol and apoB levels. [provided by RefSeq, Dec 2019]
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ACMG classification
Classification made for transcript
Verdict is Uncertain_significance. Variant got 4 ACMG points.
PM2
?
Very rare variant in population databases, with high coverage;
PP3
?
MetaRNN computational evidence supports a deleterious effect, 0.914
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
APOB | NM_000384.3 | c.1580C>T | p.Ala527Val | missense_variant | 12/29 | ENST00000233242.5 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
APOB | ENST00000233242.5 | c.1580C>T | p.Ala527Val | missense_variant | 12/29 | 1 | NM_000384.3 | P1 | |
APOB | ENST00000399256.4 | c.1580C>T | p.Ala527Val | missense_variant | 12/17 | 1 | |||
APOB | ENST00000673739.2 | c.*886C>T | 3_prime_UTR_variant, NMD_transcript_variant | 11/25 | |||||
APOB | ENST00000673882.2 | c.*886C>T | 3_prime_UTR_variant, NMD_transcript_variant | 11/23 |
Frequencies
GnomAD3 genomes ? Cov.: 33
GnomAD3 genomes
?
Cov.:
33
GnomAD4 exome AF: 0.00000205 AC: 3AN: 1461876Hom.: 0 Cov.: 32 AF XY: 0.00000138 AC XY: 1AN XY: 727242
GnomAD4 exome
AF:
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3
AN:
1461876
Hom.:
Cov.:
32
AF XY:
AC XY:
1
AN XY:
727242
Gnomad4 AFR exome
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GnomAD4 genome ? Cov.: 33
GnomAD4 genome
?
Cov.:
33
ClinVar
Significance: Uncertain significance
Submissions summary: Uncertain:3
Revision: criteria provided, multiple submitters, no conflicts
LINK: link
Submissions by phenotype
Hypercholesterolemia, autosomal dominant, type B;C4551990:Familial hypobetalipoproteinemia 1 Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Invitae | Nov 23, 2021 | In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Probably Damaging"; Align-GVGD: "Class C0"). ClinVar contains an entry for this variant (Variation ID: 265882). This variant has not been reported in the literature in individuals affected with APOB-related conditions. This variant is not present in population databases (gnomAD no frequency). This sequence change replaces alanine, which is neutral and non-polar, with valine, which is neutral and non-polar, at codon 527 of the APOB protein (p.Ala527Val). - |
Hypercholesterolemia, familial, 1 Uncertain:1
Uncertain significance, criteria provided, single submitter | research | Cardiovascular Research Group, Instituto Nacional de Saude Doutor Ricardo Jorge | Mar 01, 2016 | - - |
not provided Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | AiLife Diagnostics, AiLife Diagnostics | Jan 31, 2022 | - - |
Computational scores
Source:
Name
Calibrated prediction
Score
Prediction
AlphaMissense
Pathogenic
BayesDel_addAF
Pathogenic
D
BayesDel_noAF
Pathogenic
CADD
Pathogenic
DANN
Pathogenic
Eigen
Pathogenic
Eigen_PC
Pathogenic
FATHMM_MKL
Pathogenic
D
M_CAP
Uncertain
D
MetaRNN
Pathogenic
D;D
MetaSVM
Uncertain
D
MutationTaster
Benign
D;D
PrimateAI
Uncertain
T
PROVEAN
Uncertain
D;D
REVEL
Pathogenic
Sift
Uncertain
D;D
Sift4G
Pathogenic
D;D
Vest4
MutPred
Loss of catalytic residue at M522 (P = 0.0261);Loss of catalytic residue at M522 (P = 0.0261);
MVP
MPC
ClinPred
D
GERP RS
gMVP
Splicing
Name
Calibrated prediction
Score
Prediction
SpliceAI score (max)
Details are displayed if max score is > 0.2
Find out detailed SpliceAI scores and Pangolin per-transcript scores at