18-32210549-C-A

Position:

chr18-32210549-C-A

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_005925.3(MEP1B):c.968C>A(p.Ala323Asp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000217 in 1,613,854 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000023 ( 0 hom. )

Consequence

MEP1B
NM_005925.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -0.584

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 Likely_benign. Variant got -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.042322695).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein
MEP1B	NM_005925.3 linkuse as main transcript	c.968C>A	p.Ala323Asp	missense_variant	10/15	ENST00000269202.11	NP_005916.2
MEP1B	NM_001308171.2 linkuse as main transcript	c.968C>A	p.Ala323Asp	missense_variant	10/15		NP_001295100.1
MEP1B	XM_011526013.3 linkuse as main transcript	c.749C>A	p.Ala250Asp	missense_variant	9/14		XP_011524315.1
MEP1B	XM_011526014.3 linkuse as main transcript	c.596C>A	p.Ala199Asp	missense_variant	8/13		XP_011524316.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris
MEP1B	ENST00000269202.11 linkuse as main transcript	c.968C>A	p.Ala323Asp	missense_variant	10/15	1	NM_005925.3	ENSP00000269202	P4
MEP1B	ENST00000581447.1 linkuse as main transcript	c.968C>A	p.Ala323Asp	missense_variant	10/15	1		ENSP00000463280	A1
GAREM1	ENST00000583696.1 linkuse as main transcript	c.66-74089G>T		intron_variant		3		ENSP00000464185

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152170

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000161

AC:

AN:

249186

Hom.:

AF XY:

0.0000222

AC XY:

AN XY:

135180

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000354

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000233

AC:

AN:

1461684

Hom.:

Cov.:

AF XY:

0.0000206

AC XY:

AN XY:

727120

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000288

Gnomad4 OTH exome

AF:

0.0000331

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152170

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74352

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000282

Hom.:

Bravo

AF:

0.0000151

ExAC

AF:

0.00000828

AC:

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

Dec 15, 2023

The c.968C>A (p.A323D) alteration is located in exon 10 (coding exon 10) of the MEP1B gene. This alteration results from a C to A substitution at nucleotide position 968, causing the alanine (A) at amino acid position 323 to be replaced by an aspartic acid (D). 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

0.10

BayesDel_addAF

Benign

-0.44

BayesDel_noAF

Benign

-0.76

CADD

Benign

0.024

DANN

Benign

0.67

DEOGEN2

Benign

0.065

T;T

Eigen

Benign

-1.5

Eigen_PC

Benign

-1.4

FATHMM_MKL

Benign

0.032

LIST_S2

Benign

0.59

T;T

M_CAP

Benign

0.0061

MetaRNN

Benign

0.042

T;T

MetaSVM

Benign

-0.91

MutationAssessor

Benign

-0.96

N;.

MutationTaster

Benign

1.0

N;N

PrimateAI

Benign

0.32

PROVEAN

Benign

2.6

N;.

REVEL

Benign

0.037

Sift

Benign

0.76

T;.

Sift4G

Benign

0.90

T;T

Polyphen

0.0

B;.

Vest4

0.081

MutPred

0.53

Gain of disorder (P = 0.0822);Gain of disorder (P = 0.0822);

MVP

0.085

MPC

0.16

ClinPred

0.032

GERP RS

-1.7

Varity_R

0.29

gMVP

0.52

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