18-21741597-G-C

Variant names:

• chr18-21741597-G-C
• rs868729096
• NM_020774.4:c.14G>C

Variant summary

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

The NM_020774.4(MIB1):​c.14G>C​(p.Arg5Pro) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. 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. R5W) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: MIB1 NM_020774.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 6.20
• Publications: 2 publications found

Genes affected

MIB1 (HGNC:21086): (MIB E3 ubiquitin protein ligase 1) This gene encodes a protein containing multiple ankyrin repeats and RING finger domains that functions as an E3 ubiquitin ligase. The encoded protein positively regulates Notch signaling by ubiquitinating the Notch receptors, thereby facilitating their endocytosis. This protein may also promote the ubiquitination and degradation of death-associated protein kinase 1 (DAPK1). [provided by RefSeq, Jun 2013]

MIB1 Gene-Disease associations (from GenCC):

• left ventricular noncompaction

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• dilated cardiomyopathy

  Inheritance: AD Classification: LIMITED Submitted by: ClinGen
• neurodevelopmental disorder

  Inheritance: AD Classification: LIMITED Submitted by: G2P
• left ventricular noncompaction 7

  Inheritance: Unknown Classification: LIMITED Submitted by: Labcorp Genetics (formerly Invitae)
• isolated cleft palate

  Inheritance: Unknown Classification: NO_KNOWN Submitted by: Labcorp Genetics (formerly Invitae)

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_020774.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MIB1	NM_020774.4	MANE Select	c.14G>C	p.Arg5Pro	missense	Exon 1 of 21	NP_065825.1	Q86YT6

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MIB1	ENST00000261537.7	TSL:1 MANE Select	c.14G>C	p.Arg5Pro	missense	Exon 1 of 21	ENSP00000261537.6	Q86YT6
	MIB1	ENST00000955830.1		c.14G>C	p.Arg5Pro	missense	Exon 1 of 22	ENSP00000625889.1
	MIB1	ENST00000864012.1		c.14G>C	p.Arg5Pro	missense	Exon 1 of 20	ENSP00000534071.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.50
BayesDel_addAF	Benign	-0.054	T
BayesDel_noAF	Benign	-0.32
CADD	Uncertain	25
DANN	Uncertain	0.99
DEOGEN2	Benign	0.41	T
Eigen	Uncertain	0.26
Eigen_PC	Benign	0.19
FATHMM_MKL	Uncertain	0.86	D
LIST_S2	Benign	0.83	T
M_CAP	Pathogenic	0.89	D
MetaRNN	Uncertain	0.58	D
MetaSVM	Benign	-0.64	T
MutationAssessor	Uncertain	2.6	M
PhyloP100		6.2
PrimateAI	Pathogenic	0.87	D
PROVEAN	Benign	-0.69	N
REVEL	Benign	0.20
Sift	Pathogenic	0.0	D
Sift4G	Pathogenic	0.0	D
Polyphen		0.99	D
Vest4		0.42
MutPred		0.31		Loss of MoRF binding (P = 2e-04)
MVP		0.70
MPC		1.2
ClinPred		0.95	D
GERP RS		3.3
Varity_R		0.56
gMVP		0.77
Mutation Taster		=40/60	disease causing

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: rs868729096; hg19: chr18-19321558;