2-28529326-A-T

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_153021.5(PLB1):c.335A>T(p.Asp112Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 31)
• Consequence: PLB1 NM_153021.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 2.69

Genes affected

PLB1 (HGNC:30041): (phospholipase B1) This gene encodes a membrane-associated phospholipase that displays lysophospholipase and phospholipase A2 activities through removal of sn-1 and sn-2 fatty acids of glycerophospholipids. In addition, it displays lipase and retinyl ester hydrolase activities. The encoded protein is highly conserved and is composed of a large, glycosylated extracellular domain composed of four tandem homologous domains, followed by a hydrophobic segment that anchors the enzyme to the membrane and a short C-terminal cytoplasmic tail. This gene has been identified as a candidate rheumatoid arthritis risk gene. [provided by RefSeq, Jul 2016]

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.4170858).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
PLB1	NM_153021.5	c.335A>T	p.Asp112Val	missense_variant	7/58	ENST00000327757.10
PLB1	NM_001170585.2	c.335A>T	p.Asp112Val	missense_variant	7/57

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PLB1	ENST00000327757.10	c.335A>T	p.Asp112Val	missense_variant	7/58	1	NM_153021.5	P1
PLB1	ENST00000422425.6	c.335A>T	p.Asp112Val	missense_variant	7/57	1
PLB1	ENST00000404858.5	c.332A>T	p.Asp111Val	missense_variant	7/57	1
PLB1	ENST00000416713.5	c.167A>T	p.Asp56Val	missense_variant	7/11	5

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 31

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

Jan 05, 2022

The c.335A>T (p.D112V) alteration is located in exon 7 (coding exon 7) of the PLB1 gene. This alteration results from a A to T substitution at nucleotide position 335, causing the aspartic acid (D) at amino acid position 112 to be replaced by a valine (V). 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	0.59
BayesDel_addAF	Benign	-0.011	T
BayesDel_noAF	Benign	-0.25
Cadd	Benign	23
Dann	Uncertain	0.99
Eigen	Benign	-0.12
Eigen_PC	Benign	-0.11
FATHMM_MKL	Uncertain	0.92	D
LIST_S2	Benign	0.85	T;T;T
M_CAP	Benign	0.018	T
MetaRNN	Benign	0.42	T;T;T
MetaSVM	Benign	-0.84	T
MutationTaster	Benign	1.0	D;D
PrimateAI	Benign	0.44	T
PROVEAN	Pathogenic	-5.1	D;D;D
REVEL	Benign	0.22
Sift	Uncertain	0.0020	D;D;D
Sift4G	Uncertain	0.0020	D;D;D
Polyphen		0.97, 1.0	.;D;D
Vest4		0.72, 0.71
MutPred		0.72		.;Gain of helix (P = 0.0854);Gain of helix (P = 0.0854);
MVP		0.33
MPC		0.15
ClinPred		0.99	D
GERP RS		3.1
Varity_R		0.28
gMVP		0.60

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: chr2-28752193;