rs587783916

chr5-36986289-A-G

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PP2 PP3

The NM_133433.4(NIPBL):c.3109A>G(p.Lys1037Glu) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000442 in 1,356,362 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: 32)
  • Exomes 𝑓: 0.0000044 (0 hom.)
• Consequence: NIPBL NM_133433.4 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:4
• Conservation: PhyloP100: 8.16

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]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PP2: Missense variant where missense usually causes diseases, NIPBL
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.785

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
NIPBL	NM_133433.4	c.3109A>G	p.Lys1037Glu	missense_variant	10/47	ENST00000282516.13

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
NIPBL	ENST00000282516.13	c.3109A>G	p.Lys1037Glu	missense_variant	10/47	1	NM_133433.4	P1
NIPBL	ENST00000448238.2	c.3109A>G	p.Lys1037Glu	missense_variant	10/46	1
NIPBL	ENST00000652901.1	c.3109A>G	p.Lys1037Glu	missense_variant	10/46
NIPBL	ENST00000504430.5	n.2729A>G		non_coding_transcript_exon_variant	6/8	2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD3 exomes AF: 0.00000590 AC: 1 AN: 169396 Hom.: 0 AF XY: 0.0000110 AC XY: 1 AN XY: 90646

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000495

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000442 AC: 6 AN: 1356362 Hom.: 0 Cov.: 28 AF XY: 0.00000600 AC XY: 4 AN XY: 667090

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.0000696

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000587

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

Bravo AF: 0.00000756

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:4

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Cornelia de Lange syndrome 1 Uncertain:3

Uncertain significance, criteria provided, single submitter	clinical testing	Invitae	Jan 30, 2023	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. Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) has been performed at Invitae for this missense variant, however the output from this modeling did not meet the statistical confidence thresholds required to predict the impact of this variant on NIPBL protein function. ClinVar contains an entry for this variant (Variation ID: 159072). This variant has not been reported in the literature in individuals affected with NIPBL-related conditions. The frequency data for this variant in the population databases is considered unreliable, as metrics indicate poor data quality at this position in the gnomAD database. This sequence change replaces lysine, which is basic and polar, with glutamic acid, which is acidic and polar, at codon 1037 of the NIPBL protein (p.Lys1037Glu). -
Uncertain significance, criteria provided, single submitter	clinical testing	Genome-Nilou Lab	Jul 15, 2021	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Genetic Services Laboratory, University of Chicago	Feb 08, 2013	- -

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

GeneDx

Mar 21, 2016

A variant of unknown significance has been identified in the NIPBL gene. The K1037E variant has not been published as a pathogenic variant, nor has it been reported as a benign polymorphism to our knowledge. It was not observed in approximately 6,500 individuals of European and African American ancestry in the NHLBI Exome Sequencing Project, indicating it is not a common benign variant in these populations. The K1037E variant is a non-conservative amino acid substitution, which is likely to impact secondary protein structure as these residues differ in polarity, charge, size and/or other properties. This substitution occurs at a position that is highly conserved across species. In silico analysis predicts this variant is probably damaging to the protein structure/function. However, missense mutations in nearby residues have not been reported in the Human Gene Mutation Database in association with NIPBL-related disorders (Stenson et al., 2009). Therefore, based on the currently available information, it is unclear whether this variant is a pathogenic variant or a rare benign variant. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.77
BayesDel_addAF	Pathogenic	0.32	D
BayesDel_noAF	Pathogenic	0.22
Cadd	Uncertain	23
Dann	Uncertain	1.0
DEOGEN2	Benign	0.20	T;.
Eigen	Uncertain	0.58
Eigen_PC	Uncertain	0.66
FATHMM_MKL	Pathogenic	1.0	D
LIST_S2	Uncertain	0.88	D;D
M_CAP	Uncertain	0.12	D
MetaRNN	Pathogenic	0.78	D;D
MetaSVM	Uncertain	0.67	D
MutationAssessor	Benign	1.4	L;L
MutationTaster	Benign	1.0	D;D
PrimateAI	Uncertain	0.75	T
PROVEAN	Benign	-0.47	N;N
REVEL	Uncertain	0.51
Sift	Uncertain	0.0040	D;D
Sift4G	Benign	0.41	T;T
Polyphen		0.99	D;D
Vest4		0.68
MutPred		0.36		Loss of MoRF binding (P = 0.0011);Loss of MoRF binding (P = 0.0011);
MVP		0.87
MPC		0.52
ClinPred		0.65	D
GERP RS		6.1
Varity_R		0.28
gMVP		0.61

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.0		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Other links and lift over

dbSNP: rs587783916; hg19: chr5-36986391;