rs1555459977
Positions:
Variant summary
Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2PP3
The NM_024675.4(PALB2):āc.2656T>Cā(p.Cys886Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,882 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 (ā ā ).
Frequency
Genomes: not found (cov: 32)
Exomes š: 6.8e-7 ( 0 hom. )
Consequence
PALB2
NM_024675.4 missense
NM_024675.4 missense
Scores
3
9
7
Clinical Significance
Conservation
PhyloP100: 1.84
Genes affected
PALB2 (HGNC:26144): (partner and localizer of BRCA2) This gene encodes a protein that may function in tumor suppression. This protein binds to and colocalizes with the breast cancer 2 early onset protein (BRCA2) in nuclear foci and likely permits the stable intranuclear localization and accumulation of BRCA2. [provided by RefSeq, Jul 2008]
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ACMG classification
Classification made for transcript
Verdict is Uncertain_significance. Variant got 3 ACMG points.
PM2
Very rare variant in population databases, with high coverage;
PP3
MetaRNN computational evidence supports a deleterious effect, 0.812
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | Protein | UniProt |
---|---|---|---|---|---|---|---|---|
PALB2 | NM_024675.4 | c.2656T>C | p.Cys886Arg | missense_variant | 7/13 | ENST00000261584.9 | NP_078951.2 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Protein | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|---|
PALB2 | ENST00000261584.9 | c.2656T>C | p.Cys886Arg | missense_variant | 7/13 | 1 | NM_024675.4 | ENSP00000261584.4 |
Frequencies
GnomAD3 genomes Cov.: 32
GnomAD3 genomes
Cov.:
32
GnomAD4 exome AF: 6.84e-7 AC: 1AN: 1461882Hom.: 0 Cov.: 31 AF XY: 0.00000138 AC XY: 1AN XY: 727240
GnomAD4 exome
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1
AN:
1461882
Hom.:
Cov.:
31
AF XY:
AC XY:
1
AN XY:
727240
Gnomad4 AFR exome
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GnomAD4 genome Cov.: 32
GnomAD4 genome
Cov.:
32
ClinVar
Significance: Uncertain significance
Submissions summary: Uncertain:2
Revision: criteria provided, multiple submitters, no conflicts
LINK: link
Submissions by phenotype
Familial cancer of breast Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Labcorp Genetics (formerly Invitae), Labcorp | Sep 12, 2019 | This variant has not been reported in the literature in individuals with PALB2-related disease. This variant is not present in population databases (ExAC no frequency). This sequence change replaces cysteine with arginine at codon 886 of the PALB2 protein (p.Cys886Arg). The cysteine residue is highly conserved and there is a large physicochemical difference between cysteine and arginine. 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 output the following: SIFT: "Deleterious"; PolyPhen-2: "Probably Damaging"; Align-GVGD: "Class C65". The arginine amino acid residue is found in multiple mammalian species, suggesting that this missense change does not adversely affect protein function. These predictions have not been confirmed by published functional studies and their clinical significance is uncertain. - |
Hereditary cancer-predisposing syndrome Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Ambry Genetics | Nov 16, 2024 | The p.C886R variant (also known as c.2656T>C), located in coding exon 7 of the PALB2 gene, results from a T to C substitution at nucleotide position 2656. The cysteine at codon 886 is replaced by arginine, an amino acid with highly dissimilar properties. This amino acid position is conserved. In addition, the in silico prediction for this alteration is inconclusive. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. - |
Computational scores
Source:
Name
Calibrated prediction
Score
Prediction
AlphaMissense
Uncertain
BayesDel_addAF
Pathogenic
D
BayesDel_noAF
Uncertain
CADD
Benign
DANN
Uncertain
DEOGEN2
Benign
T;T
Eigen
Uncertain
Eigen_PC
Uncertain
FATHMM_MKL
Uncertain
D
LIST_S2
Benign
T;T
M_CAP
Benign
T
MetaRNN
Pathogenic
D;D
MetaSVM
Benign
T
MutationAssessor
Uncertain
.;M
PrimateAI
Uncertain
T
PROVEAN
Pathogenic
D;D
REVEL
Uncertain
Sift
Benign
T;T
Sift4G
Benign
T;T
Polyphen
1.0
.;D
Vest4
MutPred
0.78
.;Loss of ubiquitination at K883 (P = 0.0597);
MVP
0.63
MPC
0.43
ClinPred
D
GERP RS
RBP_binding_hub_radar
RBP_regulation_power_radar
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