NM_133433.4:c.133C>G

Variant names:

• chr5-36955540-C-G
• rs80358367
• NM_133433.4:c.133C>G
• NIPBL p.Arg45Gly

GermlineCancer (beta)

Variant summary

Our verdict is Uncertain significance.

+3 Uncertain · Warm

-7

-6

-1

0

+5

+6

+9

+10

BenignB

Likely BenignLB

UncertainVUS

Likely PathogenicLP

PathogenicP

The variant received 3 classification points (ACGS-UK Somatic Oncogenicity v2025). O3_ModerateO6_Supporting

The NM_133433.4(NIPBL):c.133C>G (p.Arg45Gly) variant causes a missense change involving the alteration of a non-conserved nucleotide. The gene NIPBL is a tumor suppressor gene (CancerMine: 1 TSG citations). The variant allele was found at a cumulative frequency of 0.000000684 (AC=1) in the gnomAD database across 1,461,490 control chromosomes (no homozygotes observed). The grpmax filtering allele frequency (95% CI) is 0.0000009. In-silico predictor (REVEL) classifies this variant as likely damaging/oncogenic. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Other variants at the same amino acid position have been reported in ClinVar (not pathogenic): p.R45Q: Uncertain_significance (ClinVar VariationId 1918803, 1 star)

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: NIPBL NM_133433.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 3.03
• Publications: 3 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: G2P, PanelApp Australia, Labcorp Genetics (formerly Invitae)

Classification according to ACGS-UK Somatic Oncogenicity v2025

Classification was made for transcript:

Our verdict: Uncertain_significance. The variant received 3 points.

Apply	Criterion Code & Title / Strength	Strength	Rationale / Clinical Context
	O3Absent or very rare in population		Absent or extremely rare in gnomAD (AC ≤ 2) — O3 moderate; GnomAD: AF = 0.000001, AC = 1 — absent/extremely rare (O3 moderate [+2])
	O6Computational evidence supports deleterious effect		Computational evidence supports a deleterious/oncogenic effect; Missense variant — primary computational scorer supports an oncogenic/deleterious effect

Variant Effect in Transcripts

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

RefSeq Transcripts

Sel.	Gene / Transcript	Tags	HGVSc / HGVSp	Effect	Exon rank	Protein / UniProt
	NIPBL NM_133433.4	MANE Select	c.133C>G p.Arg45Gly	missense	Exon 3 of 47	Prot: NP_597677.2
	NIPBL NM_001438586.1		c.133C>G p.Arg45Gly	missense	Exon 3 of 47	Prot: NP_001425515.1
	NIPBL NM_015384.5		c.133C>G p.Arg45Gly	missense	Exon 3 of 46	Prot: NP_056199.2

NIPBL NM_133433.4

MANE Select

HGVSc / HGVSpc.133C>Gp.Arg45Gly

Exon rankExon 3 of 47

missense

Prot: NP_597677.2

NIPBL NM_001438586.1

HGVSc / HGVSpc.133C>Gp.Arg45Gly

Exon rankExon 3 of 47

missense

Prot: NP_001425515.1

NIPBL NM_015384.5

HGVSc / HGVSpc.133C>Gp.Arg45Gly

Exon rankExon 3 of 46

missense

Prot: NP_056199.2

Ensembl Transcripts

Sel.	Gene / Transcript	Tags	HGVSc / HGVSp	Effect	Exon rank	Protein / UniProt
	NIPBL ENST00000282516.13	TSL:1MANE Select	c.133C>G p.Arg45Gly	missense	Exon 3 of 47	Prot: ENSP00000282516.8 UniProt:
	NIPBL ENST00000448238.2	TSL:1	c.133C>G p.Arg45Gly	missense	Exon 3 of 46	Prot: ENSP00000406266.2 UniProt:
	NIPBL ENST00000652901.1		c.133C>G p.Arg45Gly	missense	Exon 3 of 46	Prot: ENSP00000499536.1 UniProt:

NIPBL ENST00000282516.13

TSL:1MANE Select

HGVSc / HGVSpc.133C>Gp.Arg45Gly

Exon rankExon 3 of 47

missense

Prot: ENSP00000282516.8UniProt: Q6KC79-1

NIPBL ENST00000448238.2

TSL:1

HGVSc / HGVSpc.133C>Gp.Arg45Gly

Exon rankExon 3 of 46

missense

Prot: ENSP00000406266.2UniProt: Q6KC79-2

NIPBL ENST00000652901.1

HGVSc / HGVSpc.133C>Gp.Arg45Gly

Exon rankExon 3 of 46

missense

Prot: ENSP00000499536.1UniProt: A0A590UJS4

Frequencies

Allele frequencies (AF), counts (AC/AN), homozygotes and coverage

Common (AF > 0.05 / Hom > 5)

Rare (AF ≤ 0.0001 / Hom ≤ 1)

Source / population	AF	AC	Hom	AN	Coverage
Global population databases 3 sources Large-scale international reference populations
GnomAD3 genomes	AF:	AC:	Hom:	AN:	Cov:32
GnomAD4 exome	AF: 6.84e-7	AC:1	Hom:0	AN:1461490	Cov:31
GnomAD4 genome	AF:	AC:	Hom:	AN:	Cov:32

Showing 3 sources

ClinVar

Not reported in ClinVar

Computational Scores

Algorithm	Calibrated pred.	Score	Prediction
AlphaGenome AVI	Pathogenic	26
AlphaMissense	Pathogenic	0.69
BayesDel_addAF	Pathogenic	0.48	D
BayesDel_noAF	Pathogenic	0.45
CADD	Pathogenic	34
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.43	T
Eigen	Uncertain	0.52
Eigen_PC	Uncertain	0.45
FATHMM_MKL	Uncertain	0.90	D
FuncVEP CTI	Pathogenic	0.83
GPN-Star LLR	N/A	-9.1
GPN-Star score	N/A	9.1
LIST_S2	Pathogenic	0.98	D
M_CAP	Pathogenic	0.55	D
MetaRNN	Pathogenic	0.85	D
MetaSVM	Pathogenic	1.0	D
Mutation Taster	N/A	66/34	polymorphism
MutationAssessor	Uncertain	2.6	M
PhyloP100	Benign	3.0
PrimateAI	Uncertain	0.78	T
PROVEAN	Benign	-1.9	N
REVEL	Pathogenic	0.80
Sift	Uncertain	0.0030	D
Sift4G	Uncertain	0.0040	D
Varity_R	N/A	0.45
VESM-3B	Benign	-7.3

Showing 27 of 27 scores

Splicing Scores

Algorithm	Calibrated pred.	Score	Prediction
DS_AG_spliceai	Pathogenic	0.82	Position offset: 1
Pangolin (max)	Uncertain	0.42
Pangolin gain	Uncertain	0.42	Position offset: 1
SpliceAI score (max)	Pathogenic	0.82	Details are displayed if max score is > 0.2

Showing 4 of 4 scores

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

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

MaveDB functional evidence

MaveDB is a public repository of laboratory assays that test the effect of thousands of variants at once — treat this as supporting research data and interpret it with great caution; it is not a clinical classification.

No MaveDB functional evidence found for this variant.

Other links and lift over

dbSNP: rs80358367;

hg19: chr5-36955642;

ACMG debug oncogenicity

ACGS debug oncogenicity

ACMG debug germline

Submit to ClinVar