2-140297934-C-T

Position:

• chr2-140297934-C-T

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM2 PP3_Strong

The NM_018557.3(LRP1B):​c.12841G>A​(p.Gly4281Arg) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. 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)
• Consequence: LRP1B NM_018557.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.87

Genes affected

LRP1B (HGNC:6693): (LDL receptor related protein 1B) This gene encodes a member of the low density lipoprotein (LDL) receptor family. These receptors play a wide variety of roles in normal cell function and development due to their interactions with multiple ligands. Disruption of this gene has been reported in several types of cancer. [provided by RefSeq, Jun 2016]

ACMG classification

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, 0.989

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
LRP1B	NM_018557.3	c.12841G>A	p.Gly4281Arg	missense_variant	84/91	ENST00000389484.8
LRP1B	XM_017004341.2	c.12451G>A	p.Gly4151Arg	missense_variant	84/91
LRP1B	XM_017004342.1	c.7693G>A	p.Gly2565Arg	missense_variant	55/62

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
LRP1B	ENST00000389484.8	c.12841G>A	p.Gly4281Arg	missense_variant	84/91	1	NM_018557.3	P1
LRP1B	ENST00000437977.5	c.1537G>A	p.Gly513Arg	missense_variant	11/17	5
LRP1B	ENST00000442974.1	c.37G>A	p.Gly13Arg	missense_variant	1/7	5

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

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

May 30, 2024

The c.12841G>A (p.G4281R) alteration is located in exon 84 (coding exon 84) of the LRP1B gene. This alteration results from a G to A substitution at nucleotide position 12841, causing the glycine (G) at amino acid position 4281 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	0.75
BayesDel_addAF	Pathogenic	0.43	D
BayesDel_noAF	Pathogenic	0.38
CADD	Uncertain	26
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.82	D
Eigen	Pathogenic	1.1
Eigen_PC	Pathogenic	0.98
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.95	D
M_CAP	Pathogenic	0.47	D
MetaRNN	Pathogenic	0.99	D
MetaSVM	Pathogenic	0.81	D
MutationAssessor	Pathogenic	3.9	H
MutationTaster	Benign	1.0	D
PrimateAI	Pathogenic	0.83	D
PROVEAN	Uncertain	-3.6	D
REVEL	Pathogenic	0.78
Sift	Pathogenic	0.0	D
Sift4G	Pathogenic	0.0010	D
Polyphen		1.0	D
Vest4		0.98
MutPred		0.92		Loss of methylation at K4286 (P = 0.0786);
MVP		0.86
MPC		0.81
ClinPred		1.0	D
GERP RS		6.1
Varity_R		0.74
gMVP		0.92

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr2-141055503;