rs771877309
Variant summary
Our verdict is Likely pathogenic. Variant got 7 ACMG points: 7P and 0B. PM1PM2PM5PP2
The NM_000020.3(ACVRL1):c.969A>C(p.Lys323Asn) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. K323E) has been classified as Likely pathogenic.
Frequency
Genomes: not found (cov: 33)
Exomes 𝑓: 0.000040 ( 0 hom. )
Failed GnomAD Quality Control
Consequence
ACVRL1
NM_000020.3 missense
NM_000020.3 missense
Scores
8
6
5
Clinical Significance
Conservation
PhyloP100: -0.167
Genes affected
ACVRL1 (HGNC:175): (activin A receptor like type 1) This gene encodes a type I cell-surface receptor for the TGF-beta superfamily of ligands. It shares with other type I receptors a high degree of similarity in serine-threonine kinase subdomains, a glycine- and serine-rich region (called the GS domain) preceding the kinase domain, and a short C-terminal tail. The encoded protein, sometimes termed ALK1, shares similar domain structures with other closely related ALK or activin receptor-like kinase proteins that form a subfamily of receptor serine/threonine kinases. Mutations in this gene are associated with hemorrhagic telangiectasia type 2, also known as Rendu-Osler-Weber syndrome 2. [provided by RefSeq, Jul 2008]
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ACMG classification
Classification made for transcript
Verdict is Likely_pathogenic. Variant got 7 ACMG points.
PM1
?
In a hotspot region, there are 8 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 1 benign, 3 uncertain in NM_000020.3
PM2
?
Very rare variant in population databases, with high coverage;
PM5
?
Other missense variant is known to change same aminoacid residue: Variant chr12-51915419-A-G is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 1767756.We mark this variant Likely_pathogenic, oryginal submissions are: {Pathogenic=1, Uncertain_significance=1}.
PP2
?
Missense variant where missense usually causes diseases, ACVRL1
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
ACVRL1 | NM_000020.3 | c.969A>C | p.Lys323Asn | missense_variant | 7/10 | ENST00000388922.9 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
ACVRL1 | ENST00000388922.9 | c.969A>C | p.Lys323Asn | missense_variant | 7/10 | 1 | NM_000020.3 | P1 |
Frequencies
GnomAD3 genomes ? Cov.: 33
GnomAD3 genomes
?
Cov.:
33
GnomAD4 exome Data not reliable, filtered out with message: AS_VQSR AF: 0.0000397 AC: 58AN: 1460694Hom.: 0 Cov.: 32 AF XY: 0.0000482 AC XY: 35AN XY: 726698
GnomAD4 exome
Data not reliable, filtered out with message: AS_VQSR
AF:
AC:
58
AN:
1460694
Hom.:
Cov.:
32
AF XY:
AC XY:
35
AN XY:
726698
Gnomad4 AFR exome
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Gnomad4 AMR exome
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Gnomad4 EAS exome
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Gnomad4 SAS exome
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Gnomad4 FIN exome
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Gnomad4 NFE exome
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Gnomad4 OTH exome
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GnomAD4 genome ? Cov.: 33
GnomAD4 genome
?
Cov.:
33
ExAC
?
AF:
AC:
100
ClinVar
Significance: Uncertain significance
Submissions summary: Uncertain:1
Revision: criteria provided, single submitter
LINK: link
Submissions by phenotype
Telangiectasia, hereditary hemorrhagic, type 2 Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Invitae | Apr 25, 2017 | In summary, this variant is a rare missense change with uncertain impact on protein function. It has been classified as a Variant of Uncertain Significance. Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be disruptive, but these predictions have not been confirmed by published functional studies. The frequency data for this variant (rs771877309) in the population databases is unreliable, as metrics indicate poor quality at this position in the ExAC database. This variant has not been reported in the literature in individuals with a ACVRL1-related disease. This sequence change replaces lysine with asparagine at codon 323 of the ACVRL1 protein (p.Lys323Asn). The lysine residue is highly conserved and there is a moderate physicochemical difference between lysine and asparagine. - |
Computational scores
Source:
Name
Calibrated prediction
Score
Prediction
AlphaMissense
Pathogenic
BayesDel_addAF
Uncertain
D
BayesDel_noAF
Uncertain
Cadd
Benign
Dann
Uncertain
DEOGEN2
Pathogenic
D;.;T
Eigen
Benign
Eigen_PC
Benign
FATHMM_MKL
Benign
D
LIST_S2
Uncertain
D;D;D
M_CAP
Pathogenic
D
MetaRNN
Uncertain
D;D;D
MetaSVM
Uncertain
D
MutationAssessor
Benign
L;.;.
MutationTaster
Benign
D;D;D
PrimateAI
Pathogenic
D
PROVEAN
Pathogenic
D;D;D
REVEL
Pathogenic
Sift
Pathogenic
D;D;D
Sift4G
Pathogenic
D;D;D
Polyphen
D;.;D
Vest4
MutPred
Loss of methylation at K323 (P = 0.0204);.;.;
MVP
MPC
ClinPred
T
GERP RS
Varity_R
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