Principle of the Assay: This Protein Z enzyme linked immunosorbent assay applies a technique called a quantitative sandwich immunoassay. The microtiter plate provided in this kit has been pre-coated with a monoclonal antibody specific for Protein Z. Standards or samples are then added to the microtiter plate wells and Protein Z if present, will bind to the antibody pre-coated wells. In order to quantitatively determine the amount of Protein Z present in the sample, a standardized preparation of horseradish peroxidase (HRP)-conjugated polyclonal antibody, specific for Protein Z are added to each well to "sandwich" the Protein Z immobilized on the plate. The microtiter plate undergoes incubation, and then the wells are thoroughly washed to remove all unbound components. Next, A and B substrate solution is added to each well. The enzyme (HRP) and substrate are allowed to react over a short incubation period.Only those wells that contain Protein Z and enzyme-conjugated antibody will exhibit a change in colour. The enzyme-substrate reaction is terminated by the addition of a sulphuric acid solution and the colour change is measured spectrophotometrically at a wavelength of 450 nm.
NCBI and Uniprot Product Information
NCBI Description
This gene encodes a liver vitamin K-dependent glycoprotein that is synthesized in the liver and secreted into the plasma. The encoded protein plays a role in regulating blood coagulation by complexing with protein Z-dependent protease inhibitor to directly inhibit activated factor X at the phospholipid surface. Deficiencies in this protein are associated with an increased risk of ischemic arterial diseases and fetal loss. Mutations in this gene are the cause of protein Z deficiency. Alternate splicing results in multiple transcript variants. [provided by RefSeq, Jan 2012]
Uniprot Description
PROZ: Appears to assist hemostasis by binding thrombin and promoting its association with phospholipid vesicles. Inhibits activity of the coagulation protease factor Xa in the presence of SERPINA10, calcium and phospholipids. Belongs to the peptidase S1 family. 2 isoforms of the human protein are produced by alternative splicing.
Protein type: Secreted; Secreted, signal peptide
Chromosomal Location of Human Ortholog: 13q34
Cellular Component: endoplasmic reticulum lumen; Golgi lumen
Molecular Function: serine-type endopeptidase activity; calcium ion binding
Biological Process: cellular protein metabolic process; post-translational protein modification; proteolysis; blood coagulation; peptidyl-glutamic acid carboxylation
Disease: Protein Z Deficiency