rs777908550

Positions:

• chr2-169289050-G-A
• chr2-169289050-G-C

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 3P and 2B. PM2 PP2 BP4_Moderate

The NM_004525.3(LRP2):​c.1018C>T​(p.His340Tyr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000031 in 1,613,924 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign 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: 0.0000027 (0 hom.)
• Consequence: LRP2 NM_004525.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.405

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]

ACMG classification

Verdict is Uncertain_significance. Variant got 1 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.
• BP4: Computational evidence support a benign effect (MetaRNN=0.0890165).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
LRP2	NM_004525.3	c.1018C>T	p.His340Tyr	missense_variant	9/79	ENST00000649046.1	NP_004516.2
LRP2	XM_011511183.4	c.1018C>T	p.His340Tyr	missense_variant	9/78		XP_011509485.1
LRP2	XM_047444340.1	c.94C>T	p.His32Tyr	missense_variant	9/79		XP_047300296.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
LRP2	ENST00000649046.1	c.1018C>T	p.His340Tyr	missense_variant	9/79		NM_004525.3	ENSP00000496870	P1
LRP2	ENST00000443831.1	c.1018C>T	p.His340Tyr	missense_variant	9/23	2		ENSP00000409813

Frequencies

GnomAD3 genomes AF: 0.00000657 AC: 1 AN: 152126 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0000655

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: 0.00000274 AC: 4 AN: 1461798 Hom.: 0 Cov.: 32 AF XY: 0.00000138 AC XY: 1 AN XY: 727210

Gnomad4 AFR exome AF: 0.0000896

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: 0.00

Gnomad4 OTH exome AF: 0.0000166

GnomAD4 genome AF: 0.00000657 AC: 1 AN: 152126 Hom.: 0 Cov.: 32 AF XY: 0.0000135 AC XY: 1 AN XY: 74332

Gnomad4 AFR AF: 0.00

Gnomad4 AMR AF: 0.0000655

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

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.087
BayesDel_addAF	Benign	-0.097	T
BayesDel_noAF	Benign	-0.38
CADD	Benign	5.6
DANN	Benign	0.97
DEOGEN2	Benign	0.071	T;T;T
Eigen	Benign	-0.94
Eigen_PC	Benign	-0.96
FATHMM_MKL	Benign	0.39	N
LIST_S2	Benign	0.84	.;T;T
M_CAP	Benign	0.037	D
MetaRNN	Benign	0.089	T;T;T
MetaSVM	Benign	-0.75	T
MutationAssessor	Benign	1.2	L;L;.
MutationTaster	Benign	1.0	N;N
PrimateAI	Benign	0.24	T
PROVEAN	Benign	-0.84	.;N;N
REVEL	Benign	0.17
Sift	Benign	0.057	.;T;T
Sift4G	Uncertain	0.0060	.;D;D
Polyphen		0.14	B;B;P
Vest4		0.20, 0.28
MutPred		0.47		Loss of catalytic residue at I338 (P = 0.1843);Loss of catalytic residue at I338 (P = 0.1843);Loss of catalytic residue at I338 (P = 0.1843);
MVP		0.47
MPC		0.35
ClinPred		0.11	T
GERP RS		-2.4
Varity_R		0.051
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

Other links and lift over

dbSNP: rs777908550; hg19: chr2-170145560;