NM_001081.4:c.6142C>A

Variant names:

• chr10-16928286-G-T
• rs146995189
• NM_001081.4:c.6142C>A

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_001081.4(CUBN):​c.6142C>A​(p.Gln2048Lys) variant causes a missense change. The variant allele was found at a frequency of 0.000000684 in 1,461,656 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/22 in silico tools predict 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. Q2048E) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 31)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: CUBN NM_001081.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 5.82
• Publications: 0 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: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.16039705).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001081.4. 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
	CUBN	NM_001081.4	MANE Select	c.6142C>A	p.Gln2048Lys	missense	Exon 41 of 67	NP_001072.2

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CUBN	ENST00000377833.10	TSL:1 MANE Select	c.6142C>A	p.Gln2048Lys	missense	Exon 41 of 67	ENSP00000367064.4

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD2 exomes AF: 0.00000399 AC: 1 AN: 250838 AF XY: 0.00000738

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: 0.00000883

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461656 Hom.: 0 Cov.: 32 AF XY: 0.00000138 AC XY: 1 AN XY: 727124

African (AFR) AF: 0.00 AC: 0 AN: 33466

American (AMR) AF: 0.00 AC: 0 AN: 44704

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26126

East Asian (EAS) AF: 0.00 AC: 0 AN: 39694

South Asian (SAS) AF: 0.00 AC: 0 AN: 86254

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53408

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5766

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1111874

Other (OTH) AF: 0.0000166 AC: 1 AN: 60364

GnomAD4 genome Cov.: 31

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.079
BayesDel_addAF	Benign	-0.19	T
BayesDel_noAF	Benign	-0.51
CADD	Benign	20
DANN	Benign	0.72
DEOGEN2	Benign	0.030	T
Eigen	Benign	-0.21
Eigen_PC	Benign	-0.075
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Benign	0.67	T
M_CAP	Benign	0.0094	T
MetaRNN	Benign	0.16	T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	0.17	N
PhyloP100		5.8
PrimateAI	Benign	0.27	T
PROVEAN	Benign	-0.46	N
REVEL	Benign	0.13
Sift	Benign	0.27	T
Sift4G	Benign	0.17	T
Polyphen		0.042	B
Vest4		0.18
MutPred		0.61		Gain of ubiquitination at Q2048 (P = 0.0162)
MVP		0.46
MPC		0.17
ClinPred		0.11	T
GERP RS		4.8
Varity_R		0.18
gMVP		0.57
Mutation Taster		=88/12	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: rs146995189; hg19: chr10-16970285;