rs80358368
Variant summary
Our verdict is Pathogenic. Variant got 18 ACMG points: 18P and 0B. PVS1PM2PP5_Very_Strong
The NM_133433.4(NIPBL):c.7789del(p.Leu2597CysfsTer14) variant causes a frameshift 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 Pathogenic (★★). Synonymous variant affecting the same amino acid position (i.e. F2596F) has been classified as Likely benign. Variant results in nonsense mediated mRNA decay.
Frequency
Genomes: not found (cov: 32)
Consequence
NIPBL
NM_133433.4 frameshift
NM_133433.4 frameshift
Scores
Not classified
Clinical Significance
Conservation
PhyloP100: 1.54
Genes affected
NIPBL (HGNC:28862): (NIPBL cohesin loading factor) This gene encodes the homolog of the Drosophila melanogaster Nipped-B gene product and fungal Scc2-type sister chromatid cohesion proteins. The Drosophila protein facilitates enhancer-promoter communication of remote enhancers and plays a role in developmental regulation. It is also homologous to a family of chromosomal adherins with broad roles in sister chromatid cohesion, chromosome condensation, and DNA repair. The human protein has a bipartite nuclear targeting sequence and a putative HEAT repeat. Condensins, cohesins and other complexes with chromosome-related functions also contain HEAT repeats. Mutations in this gene result in Cornelia de Lange syndrome, a disorder characterized by dysmorphic facial features, growth delay, limb reduction defects, and cognitive disability. Two transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2008]
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ACMG classification
Classification made for transcript
Verdict is Pathogenic. Variant got 18 ACMG points.
PVS1
?
Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
PM2
?
Very rare variant in population databases, with high coverage;
PP5
?
Variant 5-37060945-TC-T is Pathogenic according to our data. Variant chr5-37060945-TC-T is described in ClinVar as [Pathogenic]. Clinvar id is 99942.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
NIPBL | NM_133433.4 | c.7789del | p.Leu2597CysfsTer14 | frameshift_variant | 45/47 | ENST00000282516.13 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
NIPBL | ENST00000282516.13 | c.7789del | p.Leu2597CysfsTer14 | frameshift_variant | 45/47 | 1 | NM_133433.4 | P1 |
Frequencies
GnomAD3 genomes ? Cov.: 32
GnomAD3 genomes
?
Cov.:
32
GnomAD4 exome Cov.: 31
GnomAD4 exome
Cov.:
31
GnomAD4 genome ? Cov.: 32
GnomAD4 genome
?
Cov.:
32
ClinVar
Significance: Pathogenic
Submissions summary: Pathogenic:4
Revision: criteria provided, multiple submitters, no conflicts
LINK: link
Submissions by phenotype
Cornelia de Lange syndrome 1 Pathogenic:2
Pathogenic, criteria provided, single submitter | clinical testing | Genetic Services Laboratory, University of Chicago | Feb 08, 2013 | - - |
Pathogenic, criteria provided, single submitter | clinical testing | Genome-Nilou Lab | Jul 15, 2021 | - - |
NIPBL-related condition Pathogenic:1
Pathogenic, criteria provided, single submitter | clinical testing | PreventionGenetics, part of Exact Sciences | Nov 22, 2023 | The NIPBL c.7789delC variant is predicted to result in a frameshift and premature protein termination (p.Leu2597Cysfs*14). This variant has been reported in an individual with Cornelia de Lange syndrome (Figure 1a, Ansari et al. 2014. PubMed ID: 25125236). It has also been reported de novo in a fetus with intrauterine growth restriction (Table S3, Fu et al. 2022. PubMed ID: 36307859). This variant has not been reported in a large population database (http://gnomad.broadinstitute.org), indicating this variant is rare. Frameshift variants in NIPBL are expected to be pathogenic. This variant is interpreted as pathogenic. - |
not provided Pathogenic:1
Pathogenic, criteria provided, single submitter | clinical testing | GeneDx | Mar 11, 2016 | The c.7789delC pathogenic variant in the NIPBL gene has been reported previously (as L2597Cfs*14 due to the use of alternative nomenclature) in association with Cornelia de Lange syndrome (Ansari et al., 2014). The c.7789delC variant causes a frameshift starting with codon Leucine 2597, changes this amino acid to a Cysteine residue, and creates a premature Stop codon at position 14 of the new reading frame, denoted p.Leu2597CysfsX14. This variant is predicted to cause loss of normal protein function either through protein truncation or nonsense-mediated mRNA decay. The c.7789delC variant was not observed in approximately 6500 individuals of European and African American ancestry in the NHLBI Exome Sequencing Project, indicating it is not a common benign variant in these populations. We interpret c.7789delC as a pathogenic variant. - |
Computational scores
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Splicing
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SpliceAI score (max)
Details are displayed if max score is > 0.2
Find out detailed SpliceAI scores and Pangolin per-transcript scores at