Genetic Variant MROH2B:p.Asp1558Glu (chr5-40998136-A-T) – ACMG Classification: Uncertain_significance (3 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2PP3

The NM_173489.5(MROH2B):c.4674T>A(p.Asp1558Glu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,459,534 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 (★).

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

MROH2B
NM_173489.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.310

Variant links:

Genes affected

MROH2B (HGNC:26857): (maestro heat like repeat family member 2B) Predicted to be involved in protein kinase A signaling. Predicted to be located in acrosomal vesicle and sperm midpiece. [provided by Alliance of Genome Resources, Apr 2022]

MROH2B links:

C7 (HGNC:1346): (complement C7) This gene encodes a serum glycoprotein that forms a membrane attack complex together with complement components C5b, C6, C8, and C9 as part of the terminal complement pathway of the innate immune system. The protein encoded by this gene contains a cholesterol-dependent cytolysin/membrane attack complex/perforin-like (CDC/MACPF) domain and belongs to a large family of structurally related molecules that form pores involved in host immunity and bacterial pathogenesis. This protein initiates membrane attack complex formation by binding the C5b-C6 subcomplex and inserts into the phospholipid bilayer, serving as a membrane anchor. Mutations in this gene are associated with a rare disorder called C7 deficiency. [provided by RefSeq, Nov 2016]

C7 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 3 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.762

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein
MROH2B	NM_173489.5 link	c.4674T>A	p.Asp1558Glu	missense_variant	Exon 42 of 42	ENST00000399564.5	NP_775760.3
MROH2B	XM_011513953.2 link	c.4488T>A	p.Asp1496Glu	missense_variant	Exon 41 of 41		XP_011512255.1
MROH2B	XM_011513952.2 link	c.*39T>A		3_prime_UTR_variant	Exon 43 of 43		XP_011512254.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MROH2B	ENST00000399564.5 link	c.4674T>A	p.Asp1558Glu	missense_variant	Exon 42 of 42	1	NM_173489.5	ENSP00000382476.4		Q7Z745-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.00000806

AC:

AN:

248184

Hom.:

AF XY:

0.0000149

AC XY:

AN XY:

134614

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000292

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000327

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000137

AC:

AN:

1459534

Hom.:

Cov.:

AF XY:

0.00000275

AC XY:

AN XY:

726158

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000224

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000116

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Dec 07, 2021

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.4674T>A (p.D1558E) alteration is located in exon 42 (coding exon 42) of the MROH2B gene. This alteration results from a T to A substitution at nucleotide position 4674, causing the aspartic acid (D) at amino acid position 1558 to be replaced by a glutamic acid (E). 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

Pathogenic

0.81

BayesDel_addAF

Benign

-0.045

BayesDel_noAF

Benign

-0.20

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Benign

0.038

T;T

Eigen

Benign

0.065

Eigen_PC

Benign

-0.069

FATHMM_MKL

Benign

0.41

LIST_S2

Benign

0.67

T;T

M_CAP

Benign

0.072

MetaRNN

Pathogenic

0.76

D;D

MetaSVM

Benign

-0.30

MutationAssessor

Uncertain

2.6

.;M

PrimateAI

Uncertain

0.48

PROVEAN

Benign

-2.2

N;N

REVEL

Uncertain

0.48

Sift

Pathogenic

0.0

D;D

Sift4G

Pathogenic

0.0

D;D

Polyphen

1.0

.;D

Vest4

0.59

MutPred

0.57

.;Gain of disorder (P = 0.0819);

MVP

0.13

MPC

0.17

ClinPred

0.95

GERP RS

1.9

Varity_R

0.27

gMVP

0.35

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

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over