3BOS

Crystal structure of a putative dna replication regulator HDA (SAMA_1916) from Shewanella amazonensis sb2b at 1.75 A resolution


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.75 Å
  • R-Value Free: 0.201 
  • R-Value Work: 0.166 

wwPDB Validation 3D Report Full Report


This is version 1.4 of the entry. See complete history

Literature

A structural basis for the regulatory inactivation of DnaA.

Xu, Q.McMullan, D.Abdubek, P.Astakhova, T.Carlton, D.Chen, C.Chiu, H.J.Clayton, T.Das, D.Deller, M.C.Duan, L.Elsliger, M.A.Feuerhelm, J.Hale, J.Han, G.W.Jaroszewski, L.Jin, K.K.Johnson, H.A.Klock, H.E.Knuth, M.W.Kozbial, P.Sri Krishna, S.Kumar, A.Marciano, D.Miller, M.D.Morse, A.T.Nigoghossian, E.Nopakun, A.Okach, L.Oommachen, S.Paulsen, J.Puckett, C.Reyes, R.Rife, C.L.Sefcovic, N.Trame, C.van den Bedem, H.Weekes, D.Hodgson, K.O.Wooley, J.Deacon, A.M.Godzik, A.Lesley, S.A.Wilson, I.A.

(2009) J.Mol.Biol. 385: 368-380

  • DOI: 10.1016/j.jmb.2008.10.059

  • PubMed Abstract: 
  • Regulatory inactivation of DnaA is dependent on Hda (homologous to DnaA), a protein homologous to the AAA+ (ATPases associated with diverse cellular activities) ATPase region of the replication initiator DnaA. When bound to the sliding clamp loaded o ...

    Regulatory inactivation of DnaA is dependent on Hda (homologous to DnaA), a protein homologous to the AAA+ (ATPases associated with diverse cellular activities) ATPase region of the replication initiator DnaA. When bound to the sliding clamp loaded onto duplex DNA, Hda can stimulate the transformation of active DnaA-ATP into inactive DnaA-ADP. The crystal structure of Hda from Shewanella amazonensis SB2B at 1.75 A resolution reveals that Hda resembles typical AAA+ ATPases. The arrangement of the two subdomains in Hda (residues 1-174 and 175-241) differs dramatically from that of DnaA. A CDP molecule anchors the Hda domains in a conformation that promotes dimer formation. The Hda dimer adopts a novel oligomeric assembly for AAA+ proteins in which the arginine finger, crucial for ATP hydrolysis, is fully exposed and available to hydrolyze DnaA-ATP through a typical AAA+ type of mechanism. The sliding clamp binding motifs at the N-terminus of each Hda monomer are partially buried and combine to form an antiparallel beta-sheet at the dimer interface. The inaccessibility of the clamp binding motifs in the CDP-bound structure of Hda suggests that conformational changes are required for Hda to form a functional complex with the clamp. Thus, the CDP-bound Hda dimer likely represents an inactive form of Hda.


    Organizational Affiliation

    Stanford Synchrotron Radiation Lightsource, Stanford University, Menlo Park, CA, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Putative DNA replication factor
A, B
242Shewanella amazonensis (strain ATCC BAA-1098 / SB2B)N/A
Find proteins for A1S6W5 (Shewanella amazonensis (strain ATCC BAA-1098 / SB2B))
Go to UniProtKB:  A1S6W5
Small Molecules
Ligands 6 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NA
Query on NA

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B
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
SCN
Query on SCN

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A
THIOCYANATE ION
C N S
ZMZDMBWJUHKJPS-UHFFFAOYSA-M
 Ligand Interaction
CL
Query on CL

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B
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
EDO
Query on EDO

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A, B
1,2-ETHANEDIOL
ETHYLENE GLYCOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
MG
Query on MG

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A, B
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
CDP
Query on CDP

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A, B
CYTIDINE-5'-DIPHOSPHATE
C9 H15 N3 O11 P2
ZWIADYZPOWUWEW-XVFCMESISA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A, B
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

Unit Cell:
Length (Å)Angle (°)
a = 55.037α = 90.00
b = 64.032β = 90.00
c = 153.640γ = 90.00
Software Package:
Software NamePurpose
SHELXphasing
SHELXDphasing
PHENIXrefinement
PDB_EXTRACTdata extraction
MolProbitymodel building
MAR345data collection
autoSHARPphasing
SCALAdata scaling
MOSFLMdata reduction
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-01-15
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Advisory, Source and taxonomy, Version format compliance
  • Version 1.2: 2011-08-10
    Type: Structure summary
  • Version 1.3: 2011-11-23
    Type: Structure summary
  • Version 1.4: 2017-10-25
    Type: Refinement description