5-36971002-A-G

Position:

• chr5-36971002-A-G

Variant summary

Our verdict is Likely pathogenic. Variant got 8 ACMG points: 8P and 0B. PM1 PM2 PP2 PP3_Moderate PP5

The NM_133433.4(NIPBL):​c.737A>G​(p.Asp246Gly) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

• Frequency: Genomes: not found (cov: 31)
• Consequence: NIPBL NM_133433.4 missense
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications P:1 U:1
• Conservation: PhyloP100: 5.79

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_pathogenic. Variant got 8 ACMG points.

• PM1: In a region_of_interest Disordered (size 212) in uniprot entity NIPBL_HUMAN there are 9 pathogenic changes around while only 3 benign (75%) in NM_133433.4
• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in gene, where missense usually causes diseases (based on misZ statistic), NIPBL. . Gene score misZ 5.5737 (greater than the threshold 3.09). Trascript score misZ 6.6817 (greater than threshold 3.09). GenCC has associacion of gene with Cornelia de Lange syndrome, Cornelia de Lange syndrome 1.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.878
• PP5: Variant 5-36971002-A-G is Pathogenic according to our data. Variant chr5-36971002-A-G is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 159229.We mark this variant Likely_pathogenic, oryginal submissions are: {Uncertain_significance=1, Pathogenic=1}. Variant chr5-36971002-A-G is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
NIPBL	NM_133433.4	c.737A>G	p.Asp246Gly	missense_variant	7/47	ENST00000282516.13	NP_597677.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
NIPBL	ENST00000282516.13	c.737A>G	p.Asp246Gly	missense_variant	7/47	1	NM_133433.4	ENSP00000282516	P1

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 31

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Pathogenic:1 Uncertain:1

Revision: criteria provided, conflicting classifications

Submissions by phenotype

Cornelia de Lange syndrome 1 Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Genetic Services Laboratory, University of Chicago

Feb 08, 2013

- -

NIPBL-related disorder Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

PreventionGenetics, part of Exact Sciences

May 02, 2023

The NIPBL c.737A>G variant is predicted to result in the amino acid substitution p.Asp246Gly. This variant has been previously reported as a de novo variant in an individual with Cornelia de Lange syndrome (Yan et al. 2006. PubMed ID: 16770807; Braunholz et al. 2012. PubMed ID: 21934712). This variant has not been reported in a large population database (http://gnomad.broadinstitute.org), indicating this variant is rare. Although we suspect that this variant may be pathogenic, at this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.64
BayesDel_addAF	Pathogenic	0.44	D
BayesDel_noAF	Pathogenic	0.40
CADD	Uncertain	24
DANN	Uncertain	1.0
DEOGEN2	Benign	0.19	T;.
Eigen	Benign	-0.12
Eigen_PC	Benign	0.067
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Benign	0.84	T;T
M_CAP	Benign	0.053	D
MetaRNN	Pathogenic	0.88	D;D
MetaSVM	Uncertain	0.089	D
MutationAssessor	Benign	1.6	L;L
MutationTaster	Benign	0.96	D;D
PrimateAI	Uncertain	0.69	T
PROVEAN	Benign	-1.5	N;N
REVEL	Uncertain	0.56
Sift	Uncertain	0.0020	D;D
Sift4G	Uncertain	0.0060	D;D
Polyphen		0.0010	B;B
Vest4		0.93
MutPred		0.79		Gain of sheet (P = 0.0011);Gain of sheet (P = 0.0011);
MVP		0.99
MPC		0.29
ClinPred		0.89	D
GERP RS		4.4
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.26
gMVP		0.66

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.10		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: rs587784042; hg19: chr5-36971104;