rs121918268

Positions:

• chr5-37002734-C-G

Variant summary

Our verdict is Uncertain significance. Variant got 5 ACMG points: 5P and 0B. PM2 PP2 PP3 PP5

The NM_133433.4(NIPBL):​c.3737C>G​(p.Ala1246Gly) variant causes a missense change involving the alteration of a conserved nucleotide. 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 Pathogenic (no stars).

• Frequency: Genomes: not found (cov: 32)
• Consequence: NIPBL NM_133433.4 missense
• Clinical Significance: Pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 7.54

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]

ACMG classification

Verdict is Uncertain_significance. Variant got 5 ACMG points.

• 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: Splicing scoreres supports a deletorius effect: Scorers claiming Pathogenic: max_spliceai. No scorers claiming Uncertain. No scorers claiming Benign.
• PP5: Variant 5-37002734-C-G is Pathogenic according to our data. Variant chr5-37002734-C-G is described in ClinVar as [Pathogenic]. Clinvar id is 2147.Status of the report is no_assertion_criteria_provided, 0 stars. Variant chr5-37002734-C-G is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
NIPBL	NM_133433.4	c.3737C>G	p.Ala1246Gly	missense_variant	15/47	ENST00000282516.13

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
NIPBL	ENST00000282516.13	c.3737C>G	p.Ala1246Gly	missense_variant	15/47	1	NM_133433.4	P1
NIPBL	ENST00000448238.2	c.3737C>G	p.Ala1246Gly	missense_variant	15/46	1
NIPBL	ENST00000652901.1	c.3737C>G	p.Ala1246Gly	missense_variant	15/46

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 29

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: no assertion criteria provided

Submissions by phenotype

Cornelia de Lange syndrome 1 Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

OMIM

Oct 01, 2004

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.69
BayesDel_addAF	Pathogenic	0.31	D
BayesDel_noAF	Pathogenic	0.20
CADD	Pathogenic	35
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.69	D;.
Eigen	Pathogenic	0.86
Eigen_PC	Pathogenic	0.86
FATHMM_MKL	Uncertain	0.95	D
LIST_S2	Uncertain	0.97	D;D
M_CAP	Benign	0.069	D
MetaRNN	Pathogenic	0.89	D;D
MetaSVM	Benign	-0.40	T
MutationAssessor	Uncertain	2.2	M;M
MutationTaster	Benign	1.0	A;A
PrimateAI	Uncertain	0.79	T
PROVEAN	Uncertain	-3.6	D;D
REVEL	Uncertain	0.55
Sift	Uncertain	0.0020	D;D
Sift4G	Uncertain	0.010	D;D
Polyphen		1.0	D;D
Vest4		0.86
MutPred		0.77		Loss of helix (P = 0.0376);Loss of helix (P = 0.0376);
MVP		0.91
MPC		1.9
ClinPred		0.98	D
GERP RS		5.8
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.75
gMVP		0.66

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.80		Details are displayed if max score is > 0.2
DS_DG_spliceai		0.80		Position offset: -1

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

Publications

LitVar

Other links and lift over

dbSNP: rs121918268; hg19: chr5-37002836;