chr12-57145487-C-T

Position:

• chr12-57145487-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PP2 PP3

The NM_002332.3(LRP1):​c.838C>T​(p.His280Tyr) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000479 in 1,460,004 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000048 (0 hom.)
• Consequence: LRP1 NM_002332.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.81

Genes affected

LRP1 (HGNC:6692): (LDL receptor related protein 1) This gene encodes a member of the low-density lipoprotein receptor family of proteins. The encoded preproprotein is proteolytically processed by furin to generate 515 kDa and 85 kDa subunits that form the mature receptor (PMID: 8546712). This receptor is involved in several cellular processes, including intracellular signaling, lipid homeostasis, and clearance of apoptotic cells. In addition, the encoded protein is necessary for the alpha 2-macroglobulin-mediated clearance of secreted amyloid precursor protein and beta-amyloid, the main component of amyloid plaques found in Alzheimer patients. Expression of this gene decreases with age and has been found to be lower than controls in brain tissue from Alzheimer's disease patients. [provided by RefSeq, Oct 2015]

LRP1-AS (HGNC:51694): (LRP1 antisense RNA)

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PP2: Missense variant in gene, where missense usually causes diseases (based on misZ statistic), LRP1. . Gene score misZ 8.2463 (greater than the threshold 3.09). Trascript score misZ 12.011 (greater than threshold 3.09). GenCC has associacion of gene with schizophrenia, atrophoderma vermiculata, keratosis pilaris atrophicans, keratosis follicularis spinulosa decalvans.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.815

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
LRP1	NM_002332.3	c.838C>T	p.His280Tyr	missense_variant	6/89	ENST00000243077.8	NP_002323.2
LRP1-AS	NR_131938.1	n.182-404G>A		intron_variant, non_coding_transcript_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
LRP1	ENST00000243077.8	c.838C>T	p.His280Tyr	missense_variant	6/89	1	NM_002332.3	ENSP00000243077	P1
LRP1-AS	ENST00000555461.1	n.182-404G>A		intron_variant, non_coding_transcript_variant		2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD3 exomes AF: 0.00000402 AC: 1 AN: 248470 Hom.: 0 AF XY: 0.00 AC XY: 0 AN XY: 134462

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.0000544

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000479 AC: 7 AN: 1460004 Hom.: 0 Cov.: 31 AF XY: 0.00000551 AC XY: 4 AN XY: 726132

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.000176

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

Bravo AF: 0.00000378

Asia WGS AF: 0.000289 AC: 1 AN: 3478

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Dec 21, 2022

The c.838C>T (p.H280Y) alteration is located in exon 6 (coding exon 6) of the LRP1 gene. This alteration results from a C to T substitution at nucleotide position 838, causing the histidine (H) at amino acid position 280 to be replaced by a tyrosine (Y). 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	0.19
BayesDel_addAF	Pathogenic	0.20	D
BayesDel_noAF	Pathogenic	0.22
CADD	Uncertain	23
DANN	Uncertain	1.0
DEOGEN2	Benign	0.38	.;T;.;T
Eigen	Uncertain	0.66
Eigen_PC	Pathogenic	0.67
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Benign	0.49	T;D;T;D
M_CAP	Benign	0.081	D
MetaRNN	Pathogenic	0.81	D;D;D;D
MetaSVM	Pathogenic	0.89	D
MutationAssessor	Benign	1.8	.;L;L;.
MutationTaster	Benign	1.0	D;D;D;D
PrimateAI	Pathogenic	0.87	D
PROVEAN	Benign	-2.3	N;D;N;D
REVEL	Pathogenic	0.79
Sift	Uncertain	0.0020	D;D;D;D
Sift4G	Uncertain	0.0040	D;D;D;D
Polyphen		0.99	D;P;.;D
Vest4		0.87
MutPred		0.48		Gain of catalytic residue at I275 (P = 0.0042);Gain of catalytic residue at I275 (P = 0.0042);Gain of catalytic residue at I275 (P = 0.0042);Gain of catalytic residue at I275 (P = 0.0042);
MVP		0.74
ClinPred		0.88	D
GERP RS		4.8
Varity_R		0.46
gMVP		0.79

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: rs1450589481; hg19: chr12-57539270;