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The Global Positioning System (GPS) has become an indispensable tool in fieldwork, offering unparalleled precision and efficiency for surveying, navigation, and infrastructure development. By harnessing signals from a constellation of satellites, GPS receivers determine the location of objects with remarkable speed and accuracy, often completing calculations within a second.Advantages of Modern GPS TechnologyContemporary GPS receivers are designed to meet the practical demands of field...
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The Global Positioning System (GPS) revolutionized positioning on Earth, providing precise location data through satellite ranging. The GPS system was developed in 1978 by the U.S. Department of Defense  for military use, and it became available for civilian applications in 1983, transforming fields including navigation, fleet management, and time synchronization for telecommunications systems.GPS consists of satellites in medium Earth orbit, about 20,200 kilometers above the surface,...
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Global Positioning System (GPS) technology has revolutionized navigation and positioning, but its accuracy is often compromised by various errors. These errors, stemming from environmental, satellite, and receiver-related factors, require careful mitigation to ensure reliable performance across applications.Atmospheric ErrorsGPS signals travel through the Earth’s ionosphere and troposphere, introducing delays which affect accuracy. The ionosphere is strongly influenced by charged particles,...
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Structural basis for the coordination of cell division with the synthesis of the bacterial cell envelope.

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The GpsB files: the truth is out there.

Richard J Lewis1

  • 1Institute for Cell and Molecular Biosciences, Newcastle University, Newcastle Upon Tyne, NE2 4HH, UK.

Molecular Microbiology
|December 24, 2016
PubMed
Summary

GpsB regulates bacterial cell wall synthesis by interacting with penicillin-binding proteins (PBPs). Its absence disrupts cell division, but this can be overcome by mutations affecting protein phosphorylation.

Area of Science:

  • Microbiology
  • Cell Biology
  • Biochemistry

Background:

  • Peptidoglycan (PG) is crucial for bacterial cell wall integrity and is synthesized by penicillin-binding proteins (PBPs).
  • The cell division regulator GpsB coordinates PG synthesis during cell division and elongation in Gram-positive bacteria.
  • The precise mechanism by which GpsB controls PG synthesis remains largely unknown.

Purpose of the Study:

  • To investigate the molecular mechanisms by which GpsB regulates peptidoglycan synthesis in Streptococcus pneumoniae.
  • To identify the protein interactions and cellular processes influenced by GpsB.

Main Methods:

  • Phenotypic and genotypic analyses of GpsB mutant strains.
  • Identification of interacting proteins using complex formation assays.

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  • Whole genome sequencing to identify suppressor mutations.

    • Main Results:

    • GpsB forms complexes with PBP2a and PBP2b in pneumococci.
    • GpsB depletion or deletion inhibits the closure of the septal ring, a process dependent on PBP2x.
    • Loss of GpsB function can be suppressed by mutations, including in the gene for the sole PP2C Ser/Thr phosphatase, suggesting a role in protein phosphorylation.

    Conclusions:

    • GpsB plays a critical, yet uncharacterized, role in protein phosphorylation in Streptococcus pneumoniae.
    • Discrepancies in previous literature regarding GpsB function may be due to uncharacterized suppressor mutations.
    • Strain validation and whole genome sequencing are essential for accurate genetic analysis.