rs587783916

Variant names:

• chr5-36986289-A-G
• rs587783916
• NM_133433.4:c.3109A>G

Variant summary

Our verdict is Likely benign. Variant got -3 ACMG points: 2P and 5B. PP2 PP3 BS1_Supporting BS2

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:5
• 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 Likely_benign. Variant got -3 ACMG points.

• PP2: Missense variant in the NIPBL gene, where missense mutations are typically associated with disease (based on misZ statistic). The gene has 86 curated pathogenic missense variants (we use a threshold of 10). The gene has 69 curated benign missense variants. Gene score misZ: 5.5737 (above the threshold of 3.09). Trascript score misZ: 6.6817 (above the threshold of 3.09). GenCC associations: The gene is linked to Cornelia de Lange syndrome, Cornelia de Lange syndrome 1.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.785
• BS1: Variant frequency is greater than expected in population amr. gnomad4_exome allele frequency = 0.00000442 (6/1356362) while in subpopulation AMR AF= 0.0000696 (2/28716). AF 95% confidence interval is 0.0000197. There are 0 homozygotes in gnomad4_exome. There are 4 alleles in male gnomad4_exome subpopulation. Median coverage is 28. This position pass quality control queck. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting
• BS2: High AC in GnomAdExome4 at 6 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
NIPBL	NM_133433.4	c.3109A>G	p.Lys1037Glu	missense_variant	Exon 10 of 47	ENST00000282516.13	NP_597677.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
NIPBL	ENST00000282516.13	c.3109A>G	p.Lys1037Glu	missense_variant	Exon 10 of 47	1	NM_133433.4	ENSP00000282516.8
NIPBL	ENST00000448238.2	c.3109A>G	p.Lys1037Glu	missense_variant	Exon 10 of 46	1		ENSP00000406266.2
NIPBL	ENST00000652901.1	c.3109A>G	p.Lys1037Glu	missense_variant	Exon 10 of 46			ENSP00000499536.1
NIPBL	ENST00000504430.5	n.2729A>G		non_coding_transcript_exon_variant	Exon 6 of 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:5

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Cornelia de Lange syndrome 1 Uncertain:4

Mar 11, 2024

Fulgent Genetics, Fulgent Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Jul 15, 2021

Genome-Nilou Lab

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Feb 02, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

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). 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 variant has not been reported in the literature in individuals affected with NIPBL-related conditions. ClinVar contains an entry for this variant (Variation ID: 159072). 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. 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. -

Feb 08, 2013

Genetic Services Laboratory, University of Chicago

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

not provided Uncertain:1

Mar 21, 2016

GeneDx

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

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
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;