Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

The peptidoglycan recognition proteins (PGRPs).

Roman Dziarski1, Dipika Gupta

  • 1Indiana University School of Medicine-Northwest, Gary, IN 46408, USA. rdziar@iun.edu

Genome Biology
|August 26, 2006
PubMed
Summary

Peptidoglycan recognition proteins (PGRPs) are key innate immunity molecules found in many animals, including insects and mammals. These proteins play crucial roles in defending against bacterial infections by targeting peptidoglycan.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Exploratory analysis of allostatic load and mortality in patients with hepatocellular carcinoma.

BMC research notes·2026
Same author

Social Risk Phenotypes Are Strongly Associated With Hepatocellular Carcinoma Outcomes: A Statewide Cohort Study Using Latent Class Analysis.

Clinical and translational gastroenterology·2026
Same author

Targeting the deSUMOylase Ulp2 in Candida glabrata for antifungal therapies: in silico identification of silymarin and honokiol as potential inhibitors.

Journal of computer-aided molecular design·2025
Same author

SUMO-targeted Ubiquitin Ligases as crucial mediators of protein homeostasis in Candida glabrata.

PLoS pathogens·2024
Same author

Inactive Parp2 causes Tp53-dependent lethal anemia by blocking replication-associated nick ligation in erythroblasts.

Molecular cell·2024
Same author

Innate immunity gene Nod2 protects mice from orthotopic breast cancer.

Molecular biology reports·2024

Area of Science:

  • Immunology
  • Molecular Biology
  • Evolutionary Biology

Background:

  • Peptidoglycan recognition proteins (PGRPs) are conserved innate immune molecules found across diverse animal phyla, excluding nematodes and plants.
  • PGRPs possess a conserved carboxy-terminal PGRP domain homologous to bacterial type 2 amidases.
  • Insects exhibit diverse PGRP forms (short and long) with varied expression patterns and roles in immune signaling pathways like Toll and Imd.

Purpose of the Study:

  • To review the structure, function, and evolutionary distribution of Peptidoglycan Recognition Proteins (PGRPs).
  • To compare PGRP functions in insects and mammals, highlighting similarities and differences in their innate immune roles.
  • To explore the potential evolutionary origins of direct bactericidal activity observed in mammalian PGRPs.

Main Methods:

  • Literature review and comparative analysis of existing research on PGRPs in various species.
  • Examination of PGRP domain structure and homology across different animal groups.
  • Analysis of expression patterns and functional roles of PGRPs in insect and mammalian immune responses.

Main Results:

  • Insects utilize up to 19 PGRPs, classified into short and long forms, to activate immune pathways, produce antimicrobial products, and combat infections.
  • Mammals possess four secreted PGRPs, with PGLYRP-2 acting as an amidase and PGLYRP-1, PGLYRP-3, and PGLYRP-4 exhibiting direct bactericidal activity.
  • Mammalian PGRPs target bacterial peptidoglycan for hydrolysis or direct killing, distinct from membrane-permeabilizing antibacterial peptides.

Conclusions:

  • PGRPs are essential components of innate immunity, employing diverse mechanisms to recognize and eliminate bacterial threats.
  • While insect PGRPs primarily mediate immune signaling and peptidoglycan hydrolysis, mammalian PGRPs have evolved direct bactericidal functions.
  • The direct bactericidal activity of mammalian PGRPs may represent a vertebrate- or mammal-specific evolutionary innovation.

Related Experiment Videos