NM_001081.4:c.*781C>T

Variant names:

• chr10-16824194-G-A
• rs115080396
• NM_001081.4:c.*781C>T

Variant summary

Our verdict is Benign. The variant received -14 ACMG points: 0P and 14B. BP4_Strong BP6_Moderate BS1 BS2

The NM_001081.4(CUBN):​c.*781C>T variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0148 in 152,090 control chromosomes in the GnomAD database, including 61 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★).

• Frequency:
  • Genomes: 𝑓 0.015 (61 hom., cov: 32)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: CUBN NM_001081.4 3_prime_UTR
• Clinical Significance: Benign criteria provided, single submitter B:1
• Conservation: PhyloP100: -0.711
• Publications: 1 publications found

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

ACMG classification

Our verdict: Benign. The variant received -14 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.9).
• BP6: Variant 10-16824194-G-A is Benign according to our data. Variant chr10-16824194-G-A is described in ClinVar as [Benign]. Clinvar id is 299327.Status of the report is criteria_provided_single_submitter, 1 stars.
• BS1: Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.0148 (2254/152090) while in subpopulation AFR AF = 0.051 (2115/41456). AF 95% confidence interval is 0.0492. There are 61 homozygotes in GnomAd4. There are 1078 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.
• BS2: High Homozygotes in GnomAd4 at 61 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CUBN	NM_001081.4	c.*781C>T		3_prime_UTR_variant	Exon 67 of 67	ENST00000377833.10	NP_001072.2
CUBN	XM_011519709.3	c.*781C>T		3_prime_UTR_variant	Exon 41 of 41		XP_011518011.1
CUBN	XM_011519710.3	c.*781C>T		3_prime_UTR_variant	Exon 41 of 41		XP_011518012.1
CUBN	XM_011519711.4	c.*781C>T		3_prime_UTR_variant	Exon 40 of 40		XP_011518013.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CUBN	ENST00000377833.10	c.*781C>T		3_prime_UTR_variant	Exon 67 of 67	1	NM_001081.4	ENSP00000367064.4

Frequencies

GnomAD3 genomes AF: 0.0147 AC: 2233 AN: 151972 Hom.: 60 Cov.: 32

Gnomad AFR AF: 0.0506

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00557

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00104

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.0158

Gnomad NFE AF: 0.000265

Gnomad OTH AF: 0.0129

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 104 Hom.: 0 Cov.: 0 AF XY: 0.00 AC XY: 0 AN XY: 56

African (AFR) AF: 0.00 AC: 0 AN: 2

American (AMR) AF: 0.00 AC: 0 AN: 2

Ashkenazi Jewish (ASJ) AC: 0 AN: 0

East Asian (EAS) AF: 0.00 AC: 0 AN: 2

South Asian (SAS) AC: 0 AN: 0

European-Finnish (FIN) AC: 0 AN: 0

Middle Eastern (MID) AC: 0 AN: 0

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 94

Other (OTH) AF: 0.00 AC: 0 AN: 4

GnomAD4 genome AF: 0.0148 AC: 2254 AN: 152090 Hom.: 61 Cov.: 32 AF XY: 0.0145 AC XY: 1078 AN XY: 74388

African (AFR) AF: 0.0510 AC: 2115 AN: 41456

American (AMR) AF: 0.00550 AC: 84 AN: 15278

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3470

East Asian (EAS) AF: 0.00 AC: 0 AN: 5162

South Asian (SAS) AF: 0.00104 AC: 5 AN: 4814

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10606

Middle Eastern (MID) AF: 0.0170 AC: 5 AN: 294

European-Non Finnish (NFE) AF: 0.000265 AC: 18 AN: 67982

Other (OTH) AF: 0.0128 AC: 27 AN: 2116

Alfa AF: 0.0116 Hom.: 4

Bravo AF: 0.0168

Asia WGS AF: 0.00606 AC: 21 AN: 3478

ClinVar

Significance: Benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

Imerslund-Grasbeck syndrome type 1 Benign:1

Jan 13, 2018

Illumina Laboratory Services, Illumina

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.90
CADD	Benign	0.67
DANN	Benign	0.51
PhyloP100		-0.71
Mutation Taster		=100/0	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: rs115080396; hg19: chr10-16866193;