12-9163767-A-T

Variant summary

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

The NM_002864.3(PZP):c.2637T>A(p.Ser879Arg) 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: 32)
• Consequence: PZP NM_002864.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.374

Genes affected

PZP (HGNC:9750): (PZP alpha-2-macroglobulin like) The protein encoded by this gene is highly expressed in late-pregnancy serum and is similar in structure to alpha-2-macroglobulin. The encoded protein, which acts as a homotetramer, inhibits the activity of all four classes of proteinases. This protein contains cleavage sites for several proteinases. Upon binding of a proteinase, the conformation of this protein changes to trap the proteinase, limiting its activity. This protein appears to be elevated in the sera of presymptomatic Alzheimer's disease patients. [provided by RefSeq, Dec 2016]

KLRG1 (HGNC:):

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=0.3897097).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
PZP	NM_002864.3	c.2637T>A	p.Ser879Arg	missense_variant	21/36	ENST00000261336.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PZP	ENST00000261336.7	c.2637T>A	p.Ser879Arg	missense_variant	21/36	1	NM_002864.3	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 30

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

Jan 23, 2023

The c.2637T>A (p.S879R) alteration is located in exon 21 (coding exon 21) of the PZP gene. This alteration results from a T to A substitution at nucleotide position 2637, causing the serine (S) at amino acid position 879 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	Uncertain	0.49
BayesDel_addAF	Benign	-0.11	T
BayesDel_noAF	Benign	-0.39
Cadd	Benign	16
Dann	Uncertain	0.97
DEOGEN2	Benign	0.34	T
Eigen	Benign	-0.32
Eigen_PC	Benign	-0.59
FATHMM_MKL	Benign	0.12	N
LIST_S2	Benign	0.84	T
M_CAP	Benign	0.013	T
MetaRNN	Benign	0.39	T
MetaSVM	Benign	-0.86	T
MutationAssessor	Uncertain	2.7	M
MutationTaster	Benign	1.0	D;N
PrimateAI	Benign	0.34	T
PROVEAN	Uncertain	-3.9	D
REVEL	Benign	0.17
Sift	Uncertain	0.0020	D
Sift4G	Uncertain	0.010	D
Polyphen		0.97	D
Vest4		0.42
MutPred		0.47		Gain of methylation at S879 (P = 0.0168);
MVP		0.39
MPC		0.41
ClinPred		0.94	D
GERP RS		-0.0029
Varity_R		0.54
gMVP		0.73

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: chr12-9316363;