• Navigation
  • Register My DNA Kit
  • Features
  • Pricing
  • FAQ
  • About
  • Labs
  • Login
  • Get started
  1. Home
  2. Genes
  3. PNP

PNP (Purine nucleoside phosphorylase)

Loading...

The Function of PNP

The purine nucleoside phosphorylases catalyze the phosphorolytic breakdown of the N-glycosidic bond in the beta-(deoxy)ribonucleoside molecules, with the formation of the corresponding free purine bases and pentose-1-phosphate.

0 users want this gene increased, 0 users want it decreased

Protein names

Recommended name:

Pancreatic prohormone

Short name:

PP

Alternative name(s):

Pancreatic polypeptide
Obinepitide
PH
PI

PNP SNPs

    To see your genotype, you should be logged in and have a file with your genotype uploaded.

  1. RS1049564 (PNP) ??
  2. RS12147450 (PNP) ??

Top Gene-Substance Interactions

PNP Interacts with These Diseases

Disease Score

Substances That Increase PNP

Substances Interaction Organism Category

Substances That Decrease PNP

Substances Interaction Organism Category

Advanced Summary

     purine nucleoside phosphorylase deficiency At least 24 PNP gene mutations have been identified in individuals with purine nucleoside phosphorylase deficiency. Most of these mutations change single protein building blocks (amino acids) in the purine nucleoside phosphorylase enzyme. The mutations reduce or eliminate the activity of purine nucleoside phosphorylase. The resulting excess of waste molecules and further reactions involving them lead to the buildup of a substance called deoxyguanosine triphosphate (dGTP) to levels that are toxic to lymphocytes. Immature lymphocytes in the thymus are particularly vulnerable to a toxic buildup of dGTP, which damages them and triggers their self-destruction (apoptosis). The number of lymphocytes in other lymphoid tissues is also greatly reduced, resulting in the immune deficiency and vulnerability to severe infections characteristic of purine nucleoside phosphorylase deficiency.

     The PNP gene provides instructions for making an enzyme called purine nucleoside phosphorylase. This enzyme is found throughout the body but is most active in specialized white blood cells called lymphocytes. These cells protect the body against potentially harmful invaders by making immune proteins called antibodies that tag foreign particles and germs for destruction or by directly attacking virus-infected cells. Lymphocytes are produced in specialized lymphoid tissues including the thymus and lymph nodes, and then released into the blood. The thymus is a gland located behind the breastbone; lymph nodes are found throughout the body. Lymphocytes in the blood and in lymphoid tissues make up the immune system. Purine nucleoside phosphorylase is known as a housekeeping enzyme because it clears away waste molecules called deoxyinosine and deoxyguanosine, which are generated when DNA is broken down. Specifically, purine nucleoside phosphorylase converts deoxyinosine to another molecule called hypoxanthine, and converts deoxyguanosine to another molecule called guanine.

Conditions with Increased Gene Activity

Condition Change (log2fold) Comparison Species Experimental variables Experiment name

Conditions with Decreased Gene Activity

Condition Change (log2fold) Comparison Species Experimental variables Experiment name

Policies

  • Terms of Service
  • Platform Consent
  • Privacy Policy
  • Disclaimer

About

  • Customer Support
  • Our Team
  • Affiliate Program

Navigation

  • Homepage
  • DNA Wellness Reports
  • Personalized Genetics Blog
  • Register your DNA Test Kit
  • Login
  • Careers
GET STARTED
  • SelfDecode is a personalized health report service, which enables users to obtain detailed information and reports based on their genome. SelfDecode does not treat, diagnose or cure any conditions, but is for informational and educational purposes alone.
SelfDecode © 2021 All Rights Reserved