Genetic Variant MORN4:p.Glu88Val (chr10-97616707-T-A) – ACMG Classification: Uncertain_significance (4 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PM2PP3_Moderate

The NM_178832.4(MORN4):c.263A>T(p.Glu88Val) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,822 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. E88K) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

MORN4
NM_178832.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 7.93

Publications

0 publications found

Variant links:

Genes affected

MORN4 (HGNC:24001): (MORN repeat containing 4) Predicted to be involved in response to axon injury. Located in cytoplasm and filopodium tip. [provided by Alliance of Genome Resources, Apr 2022]

MORN4 links:

ENSG00000249967 (HGNC:):

ENSG00000249967 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.893

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MORN4	NM_178832.4 link	c.263A>T	p.Glu88Val	missense_variant	Exon 4 of 5	ENST00000307450.11	NP_849154.1	Q8NDC4-1A6XB87
MORN4	NM_001098831.2 link	c.263A>T	p.Glu88Val	missense_variant	Exon 4 of 5		NP_001092301.1	Q8NDC4-1A6XB87
MORN4	XM_011539251.4 link	c.263A>T	p.Glu88Val	missense_variant	Exon 4 of 5		XP_011537553.1	Q8NDC4-1A6XB87

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
MORN4	ENST00000307450.11 link	c.263A>T	p.Glu88Val	missense_variant	Exon 4 of 5	1	NM_178832.4	ENSP00000307636.6	Q8NDC4-1
ENSG00000249967	ENST00000370649.3 link	c.345+14717T>A		intron_variant	Intron 2 of 9	2		ENSP00000359683.3	E9PAM4
MORN4	ENST00000478953.1 link	c.183-296A>T		intron_variant	Intron 3 of 3	2		ENSP00000441070.1	G3V1L7

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1461822

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

727212

show subpopulations

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR)

AF:

0.00

AC:

AN:

33478

American (AMR)

AF:

0.0000224

AC:

AN:

44722

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39698

South Asian (SAS)

AF:

0.00

AC:

AN:

86256

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53414

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1111956

Other (OTH)

AF:

0.00

AC:

AN:

60394

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0.000000), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.325

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Apr 19, 2025

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.263A>T (p.E88V) alteration is located in exon 4 (coding exon 3) of the MORN4 gene. This alteration results from a A to T substitution at nucleotide position 263, causing the glutamic acid (E) at amino acid position 88 to be replaced by a valine (V). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.36

BayesDel_addAF

Pathogenic

0.32

BayesDel_noAF

Pathogenic

0.22

CADD

Pathogenic

(source)

DANN

Uncertain

0.99

DEOGEN2

Benign

0.23

Eigen

Pathogenic

0.89

Eigen_PC

Pathogenic

0.84

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Uncertain

0.96

M_CAP

Uncertain

0.11

MetaRNN

Pathogenic

0.89

MetaSVM

Uncertain

0.15

MutationAssessor

Pathogenic

3.6

PhyloP100

7.9

PrimateAI

Uncertain

0.73

PROVEAN

Pathogenic

-5.7

REVEL

Uncertain

0.62

Sift

Uncertain

0.0010

Sift4G

Uncertain

0.0030

Polyphen

1.0

Vest4

0.85

MutPred

0.59

Loss of disorder (P = 0.036);

MVP

0.76

MPC

0.69

ClinPred

1.0

GERP RS

5.7

Varity_R

0.75

gMVP

0.71

Mutation Taster

=11/89

disease causing

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.030

Details are displayed if max score is > 0.2

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

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over