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Assembly of Signaling Complexes01:30

Assembly of Signaling Complexes

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Heterotrimeric G proteins are guanine nucleotide-binding proteins. As the name suggests, heterotrimeric G proteins are composed of three subunits: alpha, beta, and gamma. They remain GDP-bound or GTP-bound inside the cells and switch between inactive/active states. The Gα subunit possesses the nucleotide-binding pocket that binds guanine nucleotides and switches between GDP or GTP-bound states. In contrast, the Gꞵ and Gγ subunits are always bound together with high affinity and are together...
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G Protein-coupled Receptors01:15

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The MultiBac Protein Complex Production Platform at the EMBL
13:51

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Published on: July 11, 2013

The GINS complex: structure and function.

Katsuhiko Kamada1

  • 1Chromosome Dynamics Laboratory, RIKEN Advanced Science Institute, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan, kamadak@riken.jp.

Sub-Cellular Biochemistry
|August 25, 2012
PubMed
Summary
This summary is machine-generated.

The GINS complex is crucial for DNA replication in eukaryotes and archaea. It forms part of the CMG helicase, enabling replication fork establishment and replisome progression.

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Area of Science:

  • Molecular Biology
  • Genetics
  • Biochemistry

Background:

  • DNA replication is a fundamental cellular process requiring precise coordination of multiple proteins.
  • The GINS complex is a key component of the CMG (Cdc45-MCM-GINS) helicase, essential for eukaryotic DNA replication.
  • GINS homologues are also vital for chromosome replication in archaea.

Purpose of the Study:

  • To elucidate the function, structure, and evolution of the GINS complex.
  • To detail the molecular events of DNA replication initiation involving GINS.
  • To compare GINS function in eukaryotes and archaea.

Main Methods:

  • Literature review of existing research on GINS complex.
  • Analysis of structural and functional data of GINS in different organisms.
  • Comparative genomics and molecular evolution studies.

Main Results:

  • GINS is indispensable for establishing replication forks and maintaining replisome progression in eukaryotes.
  • The CMG complex, including GINS, unwinds DNA at the replication fork.
  • Archaeal GINS proteins play a central role in chromosome replication through association with other components.

Conclusions:

  • The GINS complex is a conserved and essential component of the DNA replication machinery across eukaryotes and archaea.
  • Understanding GINS function provides insights into the fundamental mechanisms of DNA replication.
  • GINS links DNA unwinding with the stable progression of the replication fork.