chr18-32204234-G-A

Position:

chr18-32204234-G-A

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM2PP3_Strong

The NM_005925.3(MEP1B):c.421G>A(p.Gly141Arg) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000934 in 1,605,682 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000096 ( 0 hom. )

Consequence

MEP1B
NM_005925.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 9.95

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:

MEP1B (HGNC:):

MEP1B links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_pathogenic. Variant got 6 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.959

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
MEP1B	NM_005925.3 linkuse as main transcript	c.421G>A	p.Gly141Arg	missense_variant	7/15	ENST00000269202.11	NP_005916.2	Q16820
MEP1B	NM_001308171.2 linkuse as main transcript	c.421G>A	p.Gly141Arg	missense_variant	7/15		NP_001295100.1	Q16820J3QKX5
MEP1B	XM_011526013.3 linkuse as main transcript	c.421G>A	p.Gly141Arg	missense_variant	7/14		XP_011524315.1
MEP1B	XM_011526014.3 linkuse as main transcript	c.421G>A	p.Gly141Arg	missense_variant	7/13		XP_011524316.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	UniProt
MEP1B	ENST00000269202.11 linkuse as main transcript	c.421G>A	p.Gly141Arg	missense_variant	7/15	1	NM_005925.3	ENSP00000269202.6	Q16820
MEP1B	ENST00000581447.1 linkuse as main transcript	c.421G>A	p.Gly141Arg	missense_variant	7/15	1		ENSP00000463280.1	J3QKX5
GAREM1	ENST00000583696.1 linkuse as main transcript	c.64-67774C>T		intron_variant		3		ENSP00000464185.1	J3QRF3
MEP1B	ENST00000581184.5 linkuse as main transcript	n.466G>A		non_coding_transcript_exon_variant	7/7	3

Frequencies

GnomAD3 genomes

AF:

0.00000659

AC:

AN:

151638

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000243

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:

0.00

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.00000963

AC:

AN:

1454044

Hom.:

Cov.:

AF XY:

0.00000692

AC XY:

AN XY:

722284

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:

0.0000126

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.00000659

AC:

AN:

151638

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74006

show subpopulations

Gnomad4 AFR

AF:

0.0000243

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:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000712

Hom.:

ESP6500AA

AF:

0.000245

AC:

ESP6500EA

AF:

0.00

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 09, 2024

The c.421G>A (p.G141R) alteration is located in exon 7 (coding exon 7) of the MEP1B gene. This alteration results from a G to A substitution at nucleotide position 421, causing the glycine (G) at amino acid position 141 to be replaced by an arginine (R). 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

0.91

BayesDel_addAF

Pathogenic

0.38

BayesDel_noAF

Pathogenic

0.30

CADD

Pathogenic

DANN

Pathogenic

1.0

DEOGEN2

Uncertain

0.70

D;D;D

Eigen

Pathogenic

1.0

Eigen_PC

Pathogenic

1.0

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Uncertain

0.96

D;D;D

M_CAP

Benign

0.083

MetaRNN

Pathogenic

0.96

D;D;D

MetaSVM

Uncertain

0.23

MutationAssessor

Pathogenic

3.7

.;H;.

PrimateAI

Uncertain

0.63

PROVEAN

Pathogenic

-8.0

.;D;.

REVEL

Pathogenic

0.75

Sift

Pathogenic

0.0

.;D;.

Sift4G

Uncertain

0.0030

D;D;D

Polyphen

1.0

.;D;.

Vest4

0.97, 0.94

MutPred

0.89

.;Gain of MoRF binding (P = 0.0307);Gain of MoRF binding (P = 0.0307);

MVP

0.83

MPC

0.58

ClinPred

1.0

GERP RS

5.9

Varity_R

0.96

gMVP

0.97

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