18-32208211-C-T

Position:

chr18-32208211-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_005925.3(MEP1B):c.859C>T(p.Arg287Trp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000409 in 1,613,920 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00019 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000025 ( 0 hom. )

Consequence

MEP1B
NM_005925.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.573

Variant links:

Genes affected

MEP1B (HGNC:7020): (meprin A subunit beta) Meprins are multidomain zinc metalloproteases that are highly expressed in mammalian kidney and intestinal brush border membranes, and in leukocytes and certain cancer cells. They are involved in the hydrolysis of a variety of peptide and protein substrates, and have been implicated in cancer and intestinal inflammation. Mature meprins are oligomers of evolutionarily related, but separately encoded alpha and/or beta subunits. Homooligomers of alpha subunit are secreted, whereas, oligomers containing the beta subunit are plasma membrane-bound. This gene encodes the beta subunit. Targeted disruption of this gene in mice affects embryonic viability, renal gene expression profiles, and distribution of the membrane-associated alpha subunit in kidney and intestine. [provided by RefSeq, Oct 2011]

MEP1B links:

GAREM1 (HGNC:26136): (GRB2 associated regulator of MAPK1 subtype 1) This gene encodes an adaptor protein which functions in the epidermal growth factor (EGF) receptor-mediated signaling pathway. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Oct 2011]

GAREM1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.11331403).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein
MEP1B	NM_005925.3 linkuse as main transcript	c.859C>T	p.Arg287Trp	missense_variant	9/15	ENST00000269202.11	NP_005916.2
MEP1B	NM_001308171.2 linkuse as main transcript	c.859C>T	p.Arg287Trp	missense_variant	9/15		NP_001295100.1
MEP1B	XM_011526013.3 linkuse as main transcript	c.640C>T	p.Arg214Trp	missense_variant	8/14		XP_011524315.1
MEP1B	XM_011526014.3 linkuse as main transcript	c.548-2290C>T		intron_variant			XP_011524316.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris
MEP1B	ENST00000269202.11 linkuse as main transcript	c.859C>T	p.Arg287Trp	missense_variant	9/15	1	NM_005925.3	ENSP00000269202	P4
MEP1B	ENST00000581447.1 linkuse as main transcript	c.859C>T	p.Arg287Trp	missense_variant	9/15	1		ENSP00000463280	A1
GAREM1	ENST00000583696.1 linkuse as main transcript	c.66-71751G>A		intron_variant		3		ENSP00000464185

Frequencies

GnomAD3 genomes

AF:

0.000191

AC:

AN:

152126

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00144

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000193

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000441

Gnomad OTH

AF:

0.000956

GnomAD3 exomes

AF:

0.0000241

AC:

AN:

249252

Hom.:

AF XY:

0.0000296

AC XY:

AN XY:

135222

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000167

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000885

Gnomad OTH exome

AF:

0.000330

GnomAD4 exome

AF:

0.0000253

AC:

AN:

1461676

Hom.:

Cov.:

AF XY:

0.0000138

AC XY:

AN XY:

727128

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.000157

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000504

Gnomad4 SAS exome

AF:

0.0000116

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000153

Gnomad4 OTH exome

AF:

0.000166

GnomAD4 genome

AF:

0.000190

AC:

AN:

152244

Hom.:

Cov.:

AF XY:

0.000134

AC XY:

AN XY:

74430

show subpopulations

Gnomad4 AFR

AF:

0.0000241

Gnomad4 AMR

AF:

0.00144

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.000193

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000441

Gnomad4 OTH

AF:

0.000946

Alfa

AF:

0.0000564

Hom.:

Bravo

AF:

0.000431

ExAC

AF:

0.0000248

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

EpiCase

AF:

0.00

EpiControl

AF:

0.0000593

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jul 15, 2021

The c.859C>T (p.R287W) alteration is located in exon 9 (coding exon 9) of the MEP1B gene. This alteration results from a C to T substitution at nucleotide position 859, causing the arginine (R) at amino acid position 287 to be replaced by a tryptophan (W). 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

Benign

0.068

BayesDel_addAF

Benign

-0.36

BayesDel_noAF

Benign

-0.49

CADD

Benign

DANN

Uncertain

1.0

DEOGEN2

Benign

0.33

T;T

Eigen

Benign

-0.46

Eigen_PC

Benign

-0.52

FATHMM_MKL

Benign

0.34

LIST_S2

Uncertain

0.86

D;D

M_CAP

Benign

0.011

MetaRNN

Benign

0.11

T;T

MetaSVM

Benign

-0.99

MutationAssessor

Uncertain

2.8

M;.

MutationTaster

Benign

1.0

N;N

PrimateAI

Benign

0.23

PROVEAN

Uncertain

-4.1

D;.

REVEL

Benign

0.061

Sift

Benign

0.045

D;.

Sift4G

Uncertain

0.051

T;T

Polyphen

0.40

B;.

Vest4

0.28

MutPred

0.64

Gain of sheet (P = 0.0149);Gain of sheet (P = 0.0149);

MVP

0.41

MPC

0.19

ClinPred

0.86

GERP RS

1.2

Varity_R

0.66

gMVP

0.84

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.020

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