5LB5

Crystal structure of human RECQL5 helicase in complex with ADP/Mg (tricilinc form).


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.282 
  • R-Value Work: 0.244 

wwPDB Validation 3D Report Full Report


This is version 1.4 of the entry. See complete history

Literature

Insights into the RecQ helicase mechanism revealed by the structure of the helicase domain of human RECQL5.

Newman, J.A.Aitkenhead, H.Savitsky, P.Gileadi, O.

(2017) Nucleic Acids Res. 45: 4231-4243

  • DOI: 10.1093/nar/gkw1362
  • Primary Citation of Related Structures:  5LB3, 5LB8

  • PubMed Abstract: 
  • RecQ helicases are important maintainers of genome integrity with distinct roles in almost every cellular process requiring access to DNA. RECQL5 is one of five human RecQ proteins and is particularly versatile in this regard, forming protein complex ...

    RecQ helicases are important maintainers of genome integrity with distinct roles in almost every cellular process requiring access to DNA. RECQL5 is one of five human RecQ proteins and is particularly versatile in this regard, forming protein complexes with a diverse set of cellular partners in order to coordinate its helicase activity to various processes including replication, recombination and DNA repair. In this study, we have determined crystal structures of the core helicase domain of RECQL5 both with and without the nucleotide ADP in two distinctly different ('Open' and 'Closed') conformations. Small angle X-ray scattering studies show that the 'Open' form of the protein predominates in solution and we discuss implications of this with regards to the RECQL5 mechanism and conformational changes. We have measured the ATPase, helicase and DNA binding properties of various RECQL5 constructs and variants and discuss the role of these regions and residues in the various RECQL5 activities. Finally, we have performed a systematic comparison of the RECQL5 structures with other RecQ family structures and based on these comparisons we have constructed a model for the mechano-chemical cycle of the common catalytic core of these helicases.


    Organizational Affiliation

    Structural Genomics Consortium, University of Oxford, ORCRB, Roosevelt Drive, Oxford OX3 7DQ, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ATP-dependent DNA helicase Q5
A, B, C, D
445Homo sapiensGene Names: RECQL5 (RECQ5)
EC: 3.6.4.12
Find proteins for O94762 (Homo sapiens)
Go to Gene View: RECQL5
Go to UniProtKB:  O94762
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
A, B, C, D
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
ADP
Query on ADP

Download SDF File 
Download CCD File 
A, B, C, D
ADENOSINE-5'-DIPHOSPHATE
C10 H15 N5 O10 P2
XTWYTFMLZFPYCI-KQYNXXCUSA-N
 Ligand Interaction
MG
Query on MG

Download SDF File 
Download CCD File 
A, B, C, D
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
DMS
Query on DMS

Download SDF File 
Download CCD File 
A, B, D
DIMETHYL SULFOXIDE
C2 H6 O S
IAZDPXIOMUYVGZ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.282 
  • R-Value Work: 0.244 
  • Space Group: P 1
Unit Cell:
Length (Å)Angle (°)
a = 63.590α = 108.82
b = 84.750β = 90.06
c = 106.691γ = 96.86
Software Package:
Software NamePurpose
BUSTERrefinement
XDSdata reduction
PHASERphasing
XDSdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationCountryGrant Number
Wellcome TrustUnited Kingdom--

Revision History 

  • Version 1.0: 2016-07-06
    Type: Initial release
  • Version 1.1: 2017-01-18
    Type: Database references
  • Version 1.2: 2017-02-01
    Type: Database references
  • Version 1.3: 2017-05-03
    Type: Database references
  • Version 1.4: 2017-08-23
    Type: Author supporting evidence