PMID- 12623013
OWN - NLM
STAT- MEDLINE
DCOM- 20031008
LR  - 20071114
IS  - 0969-2126 (Print)
IS  - 0969-2126 (Linking)
VI  - 11
IP  - 3
DP  - 2003 Mar
TI  - Nucleotide-induced conformational changes in an isolated Escherichia coli DNA
      polymerase III clamp loader subunit.
PG  - 253-63
AB  - Sliding clamps are loaded onto DNA by ATP-driven clamp loader complexes. The
      structure of the E. coli clamp loader in a nucleotide-free state has been
      determined previously. We now report crystal structures of a truncated form of
      the isolated gamma-ATPase subunit, gamma(1-243), of the E. coli clamp loader, in 
      nucleotide-free and bound forms. The gamma subunit adopts a defined conformation 
      when empty, in which the nucleotide binding site is blocked. The binding of
      either ATPgammaS or ADP, which are shown to bind with equal affinity to
      gamma(1-243), induces a change in the relative orientation of the two domains
      such that nucleotides can be accommodated. This change would break one of the
      gamma:gamma interfaces seen in the empty clamp loader complex, and may represent 
      one step in the activation process.
FAU - Podobnik, Marjetka
AU  - Podobnik M
AD  - Department of Molecular and Cell Biology, Howard Hughes Medical Institute,
      University of California, Berkeley, Berkeley, CA 94720, USA.
FAU - Weitze, Tanya F
AU  - Weitze TF
FAU - O'Donnell, Mike
AU  - O'Donnell M
FAU - Kuriyan, John
AU  - Kuriyan J
LA  - eng
SI  - PDB/1NJF
SI  - PDB/1NJG
GR  - GM38839/GM/NIGMS NIH HHS/United States
GR  - GM45547/GM/NIGMS NIH HHS/United States
PT  - Journal Article
PT  - Research Support, U.S. Gov't, P.H.S.
PL  - United States
TA  - Structure
JT  - Structure (London, England : 1993)
JID - 101087697
RN  - 9007-49-2 (DNA)
RN  - EC 2.7.7.- (DNA Polymerase III)
RN  - EC 3.6.1.- (Adenosine Triphosphatases)
SB  - IM
MH  - Adenosine Triphosphatases/metabolism
MH  - DNA/*metabolism
MH  - DNA Polymerase III/*metabolism
MH  - Escherichia coli/*enzymology
MH  - Protein Conformation
MH  - Protein Structure, Quaternary
MH  - Pyrococcus furiosus/enzymology
EDAT- 2003/03/08 04:00
MHDA- 2003/10/09 05:00
CRDT- 2003/03/08 04:00
PHST- 2003/03/08 04:00 [pubmed]
PHST- 2003/10/09 05:00 [medline]
PHST- 2003/03/08 04:00 [entrez]
AID - S0969212603000273 [pii]
PST - ppublish
SO  - Structure. 2003 Mar;11(3):253-63.