5-37022382-A-G

Position:

• chr5-37022382-A-G

Variant summary

Our verdict is Pathogenic. Variant got 13 ACMG points: 13P and 0B. PM1 PM2 PM5 PP2 PP3_Strong PP5_Moderate

The NM_133433.4(NIPBL):​c.5566A>G​(p.Arg1856Gly) variant causes a missense change involving the alteration of a non-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 Likely pathogenic (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R1856I) has been classified as Pathogenic.

• Frequency: Genomes: not found (cov: 33)
• Consequence: NIPBL NM_133433.4 missense
• Clinical Significance: Likely pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: 2.01

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 Pathogenic. Variant got 13 ACMG points.

• PM1: In a repeat HEAT 2 (size 38) in uniprot entity NIPBL_HUMAN there are 6 pathogenic changes around while only 0 benign (100%) in NM_133433.4
• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr5-37022383-G-T is described in ClinVar as [Pathogenic]. Clinvar id is 558736.Status of the report is criteria_provided_single_submitter, 1 stars.
• 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, 0.976
• PP5: Variant 5-37022382-A-G is Pathogenic according to our data. Variant chr5-37022382-A-G is described in ClinVar as [Likely_pathogenic]. Clinvar id is 99934.Status of the report is criteria_provided_single_submitter, 1 stars. Variant chr5-37022382-A-G is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
NIPBL	NM_133433.4	c.5566A>G	p.Arg1856Gly	missense_variant	29/47	ENST00000282516.13

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
NIPBL	ENST00000282516.13	c.5566A>G	p.Arg1856Gly	missense_variant	29/47	1	NM_133433.4	P1
NIPBL	ENST00000448238.2	c.5566A>G	p.Arg1856Gly	missense_variant	29/46	1
NIPBL	ENST00000652901.1	c.5566A>G	p.Arg1856Gly	missense_variant	29/46

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 33

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

Submissions by phenotype

Cornelia de Lange syndrome 1 Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

Genetic Services Laboratory, University of Chicago

Feb 08, 2013

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Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.33	D
BayesDel_noAF	Pathogenic	0.23
CADD	Uncertain	25
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.86	D;.
Eigen	Uncertain	0.54
Eigen_PC	Uncertain	0.43
FATHMM_MKL	Uncertain	0.89	D
LIST_S2	Uncertain	0.96	D;D
M_CAP	Pathogenic	0.56	D
MetaRNN	Pathogenic	0.98	D;D
MetaSVM	Uncertain	0.21	D
MutationAssessor	Pathogenic	3.4	M;M
MutationTaster	Benign	1.0	A;A
PrimateAI	Pathogenic	0.91	D
PROVEAN	Pathogenic	-6.6	D;D
REVEL	Pathogenic	0.68
Sift	Uncertain	0.021	D;D
Sift4G	Pathogenic	0.0	D;D
Polyphen		1.0	D;D
Vest4		0.99
MutPred		0.84		Loss of stability (P = 0.0104);Loss of stability (P = 0.0104);
MVP		0.98
MPC		2.3
ClinPred		0.99	D
GERP RS		2.4
Varity_R		0.90
gMVP		0.95

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: rs80358373; hg19: chr5-37022484;