rs141458731
Variant summary
Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBS1BS2
The NM_024675.4(PALB2):c.2135C>T(p.Ala712Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000195 in 1,614,106 control chromosomes in the GnomAD database, including 2 homozygotes. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).
Frequency
Consequence
NM_024675.4 missense
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Benign. Variant got -20 ACMG points.
Transcripts
RefSeq
Ensembl
Frequencies
GnomAD3 genomes AF: 0.000224 AC: 34AN: 152108Hom.: 0 Cov.: 32
GnomAD3 exomes AF: 0.000294 AC: 74AN: 251492Hom.: 1 AF XY: 0.000338 AC XY: 46AN XY: 135920
GnomAD4 exome AF: 0.000192 AC: 281AN: 1461880Hom.: 2 Cov.: 32 AF XY: 0.000197 AC XY: 143AN XY: 727240
GnomAD4 genome AF: 0.000223 AC: 34AN: 152226Hom.: 0 Cov.: 32 AF XY: 0.000202 AC XY: 15AN XY: 74424
ClinVar
Submissions by phenotype
not provided Benign:7
Curators: Marc Tischkowitz, Arleen D. Auerbach. Submitter to LOVD: Marc Tischkowitz. -
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PALB2: BP4 -
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Hereditary cancer-predisposing syndrome Benign:6
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This alteration is classified as benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -
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Familial cancer of breast Benign:5
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This variant is considered benign. This variant is strongly associated with less severe personal and family histories of cancer, typical for individuals without pathogenic variants in this gene [PMID: 25085752]. Homozygosity for this variant has been confirmed in one or more individuals lacking clinical features consistent with gene-specific recessive disease, indicating that this variant is unlikely to be pathogenic. -
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not specified Benign:2
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This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -
Familial cancer of breast;C1835817:Fanconi anemia complementation group N;C3150547:Pancreatic cancer, susceptibility to, 3 Benign:1
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Fanconi anemia complementation group N Benign:1
This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). No publications were found based on this search. Allele frequency data from public databases allowed determination this variant is unlikely to cause disease. Therefore, this variant is classified as likely benign. -
Breast-ovarian cancer, familial, susceptibility to, 5 Benign:1
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Malignant tumor of breast Benign:1
The PALB2 p.Ala712Val variant was identified in 11 of 13046 proband chromosomes (frequency: 0.0008) from Jewish, Polish, German, Australian, and North American individuals or families with high-risk or familial breast, ovarian, or pancreatic cancer or Lynch syndrome and was identified in 2 of 5548 chromosomes (frequency: 0.0004) from healthy individuals (Catucci 2012, Dansonka-Mieszkowska 2010, Hellebrand 2011, Thompson 2015, Tischkowitz 2012, Yurgelun 2015, Zhen 2015). The variant was also identified in dbSNP (ID: rs141458731) “With other allele”, ClinVar (classified benign by Ambry Genetics and Invitae; and as likely benign by GeneDx and four other submitters), and LOVD 3.0 (1x). The variant was observed in control databases in 76 (1 homozygous) of 277240 chromosomes at a frequency of 0.0003 (Genome Aggregation Database Feb 27, 2017). The variant was observed in the following populations: Other in 10 of 6466 chromosomes (1 homozygous, freq: 0.002), Latino in 12 of 34420 chromosomes (freq: 0.0003), European in 36 of 126726 chromosomes (freq: 0.0003), Ashkenazi Jewish in 12 of 10152 chromosomes (freq: 0.001), and South Asian in 6 of 30782 chromosomes (freq: 0.0002); it was not observed in the African, East Asian, or Finnish populations. The variant was not identified in Cosmic, MutDB, or the Zhejiang Colon Cancer Database. The p.Ala712 residue is not conserved in mammals and computational analyses (PolyPhen-2, SIFT, AlignGVGD, BLOSUM, MutationTaster) do not suggest a high likelihood that the variant impacts the protein; however, this information is not predictive enough to rule out pathogenicity. The variant occurs outside of the splicing consensus sequence and in silico or computational prediction software programs (SpliceSiteFinder, MaxEntScan, NNSPLICE, GeneSplicer, HumanSpliceFinder) do not predict a difference in splicing. In summary, based on the above information this variant meets our laboratory's criteria to be classified as benign. -
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at