Genetic Variant CUBN:p.Cys891Trp (chr10-17068723-G-C) – ACMG Classification: Likely_pathogenic (6 pts)

Variant summary

Our verdict is Likely pathogenic. The variant received 6 ACMG points: 6P and 0B. PM2PP3_Strong

The NM_001081.4(CUBN):c.2673C>G(p.Cys891Trp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000548 in 1,459,784 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic 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. C891F) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000055 ( 0 hom. )

Consequence

CUBN
NM_001081.4 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 2.37

Publications

2 publications found

Variant links:

Genes affected

CUBN (HGNC:2548): (cubilin) Cubilin (CUBN) acts as a receptor for intrinsic factor-vitamin B12 complexes. The role of receptor is supported by the presence of 27 CUB domains. Cubulin is located within the epithelium of intestine and kidney. Mutations in CUBN may play a role in autosomal recessive megaloblastic anemia. [provided by RefSeq, Jul 2008]

CUBN Gene-Disease associations (from GenCC):

Imerslund-Grasbeck syndrome type 1
Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics, Laboratory for Molecular Medicine
proteinuria, chronic benign
Inheritance: AR Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)
Imerslund-Grasbeck syndrome
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

CUBN links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_pathogenic. The variant received 6 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.99

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CUBN	NM_001081.4 link	c.2673C>G	p.Cys891Trp	missense_variant	Exon 20 of 67	ENST00000377833.10	NP_001072.2	O60494
CUBN	XM_011519708.3 link	c.2673C>G	p.Cys891Trp	missense_variant	Exon 20 of 55		XP_011518010.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CUBN	ENST00000377833.10 link	c.2673C>G	p.Cys891Trp	missense_variant	Exon 20 of 67	1	NM_001081.4	ENSP00000367064.4		O60494

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.0000159

AC:

AN:

250862

AF XY:

0.0000221

show subpopulations

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:

0.0000264

Gnomad OTH exome

AF:

0.000164

GnomAD4 exome

AF:

0.00000548

AC:

AN:

1459784

Hom.:

Cov.:

AF XY:

0.00000688

AC XY:

AN XY:

726338

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33408

American (AMR)

AF:

0.00

AC:

AN:

44674

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26088

East Asian (EAS)

AF:

0.00

AC:

AN:

39608

South Asian (SAS)

AF:

0.00

AC:

AN:

86204

European-Finnish (FIN)

AF:

0.0000749

AC:

AN:

53412

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5752

European-Non Finnish (NFE)

AF:

0.00000360

AC:

AN:

1110330

Other (OTH)

AF:

0.00

AC:

AN:

60308

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.469

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

Alfa

AF:

0.0000125

Hom.:

ExAC

AF:

0.0000330

AC:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.86

BayesDel_addAF

Pathogenic

0.23

BayesDel_noAF

Pathogenic

0.16

CADD

Benign

(source)

DANN

Uncertain

0.99

DEOGEN2

Benign

0.42

Eigen

Uncertain

0.44

Eigen_PC

Uncertain

0.28

FATHMM_MKL

Benign

0.67

LIST_S2

Benign

0.71

M_CAP

Pathogenic

0.36

MetaRNN

Pathogenic

0.99

MetaSVM

Uncertain

-0.11

MutationAssessor

Pathogenic

4.0

PhyloP100

2.4

PrimateAI

Uncertain

0.60

PROVEAN

Pathogenic

-9.3

REVEL

Uncertain

0.54

Sift

Pathogenic

0.0

Sift4G

Pathogenic

0.0

Polyphen

1.0

Vest4

0.94

MutPred

0.97

Loss of ubiquitination at K889 (P = 0.0738);

MVP

0.78

MPC

0.52

ClinPred

1.0

GERP RS

4.5

Varity_R

0.93

gMVP

0.95

Mutation Taster

=26/74

disease causing

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.20

Details are displayed if max score is > 0.2

DS_AL_spliceai

0.20

Position offset: 47

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

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Computational scores

Splicing

Publications

Other links and lift over