NM_133433.4:c.6322G>T

Variant names:

• chr5-37044708-G-T
• rs587784006
• NM_133433.4:c.6322G>T

Variant summary

Our verdict is Uncertain significance. The variant received 3 ACMG points: 4P and 1B. PM1 PM2 BP4

The NM_133433.4(NIPBL):​c.6322G>T​(p.Ala2108Ser) variant causes a missense change. The variant allele was found at a frequency of 0.00000137 in 1,460,846 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A2108T) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: NIPBL NM_133433.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 6.33
• Publications: 0 publications found

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]

NIPBL Gene-Disease associations (from GenCC):

• Cornelia de Lange syndrome

  Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: Orphanet, ClinGen
• Cornelia de Lange syndrome 1

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P

ACMG classification

Our verdict: Uncertain_significance. The variant received 3 ACMG points.

• PM1: In a hotspot region, there are 3 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 2 uncertain in NM_133433.4
• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.2899748).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_133433.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	NIPBL	NM_133433.4	MANE Select	c.6322G>T	p.Ala2108Ser	missense	Exon 36 of 47	NP_597677.2
	NIPBL	NM_001438586.1		c.6322G>T	p.Ala2108Ser	missense	Exon 36 of 47	NP_001425515.1
	NIPBL	NM_015384.5		c.6322G>T	p.Ala2108Ser	missense	Exon 36 of 46	NP_056199.2

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	NIPBL	ENST00000282516.13	TSL:1 MANE Select	c.6322G>T	p.Ala2108Ser	missense	Exon 36 of 47	ENSP00000282516.8
	NIPBL	ENST00000448238.2	TSL:1	c.6322G>T	p.Ala2108Ser	missense	Exon 36 of 46	ENSP00000406266.2
	NIPBL	ENST00000652901.1		c.6322G>T	p.Ala2108Ser	missense	Exon 36 of 46	ENSP00000499536.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD2 exomes AF: 0.00000399 AC: 1 AN: 250746 AF XY: 0.00000737

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00000881

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1460846 Hom.: 0 Cov.: 30 AF XY: 0.00000275 AC XY: 2 AN XY: 726796

African (AFR) AF: 0.00 AC: 0 AN: 33454

American (AMR) AF: 0.00 AC: 0 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26120

East Asian (EAS) AF: 0.00 AC: 0 AN: 39660

South Asian (SAS) AF: 0.0000116 AC: 1 AN: 86234

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53404

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5754

European-Non Finnish (NFE) AF: 9.00e-7 AC: 1 AN: 1111148

Other (OTH) AF: 0.00 AC: 0 AN: 60348

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.12
BayesDel_addAF	Uncertain	0.097	D
BayesDel_noAF	Benign	-0.10
CADD	Benign	22
DANN	Benign	0.93
DEOGEN2	Benign	0.12	T
Eigen	Benign	-0.014
Eigen_PC	Benign	0.22
FATHMM_MKL	Pathogenic	0.97	D
LIST_S2	Uncertain	0.94	D
M_CAP	Benign	0.058	D
MetaRNN	Benign	0.29	T
MetaSVM	Uncertain	-0.11	T
MutationAssessor	Benign	1.7	L
PhyloP100		6.3
PrimateAI	Uncertain	0.77	T
PROVEAN	Benign	0.61	N
REVEL	Uncertain	0.41
Sift	Benign	0.57	T
Sift4G	Benign	0.48	T
Polyphen		0.14	B
Vest4		0.39
MutPred		0.48		Loss of ubiquitination at K2104 (P = 0.0702)
MVP		0.74
MPC		0.96
ClinPred		0.68	D
GERP RS		5.8
Varity_R		0.25
gMVP		0.43
Mutation Taster		=87/13	polymorphism

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

Other links and lift over

dbSNP: rs587784006; hg19: chr5-37044810;