rs140499844

Positions:

chr2-169150898-C-G

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2PP2PP3

The NM_004525.3(LRP2):c.12590G>C(p.Gly4197Ala) variant causes a missense, splice region change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000118 in 1,613,788 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. 13/23 in silico tools predict a damaging outcome for this variant. 2/3 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.000033 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000096 ( 0 hom. )

Consequence

LRP2
NM_004525.3 missense, splice_region

Scores

Splicing: ADA: 0.9997

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2

Conservation

PhyloP100: 7.68

Variant links:

Genes affected

LRP2 (HGNC:6694): (LDL receptor related protein 2) The protein encoded by this gene, low density lipoprotein-related protein 2 (LRP2) or megalin, is a multi-ligand endocytic receptor that is expressed in many different tissues but primarily in absorptive epithilial tissues such as the kidney. This glycoprotein has a large amino-terminal extracellular domain, a single transmembrane domain, and a short carboxy-terminal cytoplasmic tail. The extracellular ligand-binding-domains bind diverse macromolecules including albumin, apolipoproteins B and E, and lipoprotein lipase. The LRP2 protein is critical for the reuptake of numerous ligands, including lipoproteins, sterols, vitamin-binding proteins, and hormones. This protein also has a role in cell-signaling; extracellular ligands include parathyroid horomones and the morphogen sonic hedgehog while cytosolic ligands include MAP kinase scaffold proteins and JNK interacting proteins. Recycling of this membrane receptor is regulated by phosphorylation of its cytoplasmic domain. Mutations in this gene cause Donnai-Barrow syndrome (DBS) and facio-oculoacoustico-renal syndrome (FOAR).[provided by RefSeq, Aug 2009]

LRP2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 4 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP2

Missense variant in gene, where missense usually causes diseases (based on misZ statistic), LRP2. . Trascript score misZ 4.5094 (greater than threshold 3.09). GenCC has associacion of gene with intellectual disability, autosomal dominant 40, Stickler syndrome, Donnai-Barrow syndrome.

PP3

Splicing scoreres supports a deletorius effect: Scorers claiming Pathogenic: dbscSNV1_ADA, dbscSNV1_RF. No scorers claiming Uncertain. Scorers claiming Benign: max_spliceai.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein
LRP2	NM_004525.3 linkuse as main transcript	c.12590G>C	p.Gly4197Ala	missense_variant, splice_region_variant	68/79	ENST00000649046.1	NP_004516.2
LRP2	XM_011511183.4 linkuse as main transcript	c.12461G>C	p.Gly4154Ala	missense_variant, splice_region_variant	67/78		XP_011509485.1
LRP2	XM_047444340.1 linkuse as main transcript	c.11666G>C	p.Gly3889Ala	missense_variant, splice_region_variant	68/79		XP_047300296.1
LRP2	XM_011511184.3 linkuse as main transcript	c.10301G>C	p.Gly3434Ala	missense_variant, splice_region_variant	53/64		XP_011509486.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	Appris
LRP2	ENST00000649046.1 linkuse as main transcript	c.12590G>C	p.Gly4197Ala	missense_variant, splice_region_variant	68/79	NM_004525.3	ENSP00000496870	P1
LRP2	ENST00000649153.1 linkuse as main transcript	c.3491G>C	p.Gly1164Ala	missense_variant, splice_region_variant, NMD_transcript_variant	20/30		ENSP00000497617
LRP2	ENST00000650252.1 linkuse as main transcript	c.*301G>C		splice_region_variant, 3_prime_UTR_variant, NMD_transcript_variant	13/24		ENSP00000496887

Frequencies

GnomAD3 genomes

AF:

0.0000329

AC:

AN:

152078

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000966

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:

0.000478

GnomAD4 exome

AF:

0.00000958

AC:

AN:

1461710

Hom.:

Cov.:

AF XY:

0.00000825

AC XY:

AN XY:

727170

show subpopulations

Gnomad4 AFR exome

AF:

0.000120

Gnomad4 AMR exome

AF:

0.00

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:

0.00000719

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

AF:

0.0000329

AC:

AN:

152078

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74274

show subpopulations

Gnomad4 AFR

AF:

0.0000966

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:

0.000478

Bravo

AF:

0.0000378

ESP6500AA

AF:

0.000454

AC:

ESP6500EA

AF:

0.00

AC:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.0000593

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Donnai-Barrow syndrome

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	Baylor Genetics	Sep 01, 2017	This variant has been found once in our laboratory in trans with another missense variant (of uncertain significance) in a 1-year-old male with thrombocytopenia, microcephaly, failure to thrive, retinopathy, retinal hemorrhages, cataracts, developmental delay, infantile spasms, periventricular leukomalacia -
Uncertain significance, criteria provided, single submitter	clinical testing	Fulgent Genetics, Fulgent Genetics	Jul 13, 2021	- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.59

BayesDel_addAF

Pathogenic

0.33

BayesDel_noAF

Pathogenic

0.24

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.48

T;T

Eigen

Pathogenic

0.96

Eigen_PC

Pathogenic

0.91

FATHMM_MKL

Pathogenic

1.0

LIST_S2

Uncertain

0.95

.;D

M_CAP

Pathogenic

0.42

MetaRNN

Pathogenic

0.92

D;D

MetaSVM

Pathogenic

1.1

MutationAssessor

Pathogenic

3.4

M;M

MutationTaster

Benign

1.0

PrimateAI

Uncertain

0.61

PROVEAN

Pathogenic

-5.6

.;D

REVEL

Pathogenic

0.91

Sift

Uncertain

0.014

.;D

Sift4G

Uncertain

0.0040

.;D

Polyphen

1.0

D;D

Vest4

0.72

MVP

0.81

MPC

1.8

ClinPred

0.99

GERP RS

5.7

Varity_R

0.84

gMVP

0.97

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Pathogenic

1.0

dbscSNV1_RF

Pathogenic

0.92

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

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