Structural basis for catalytic activation of a serine recombinase

Experimental Data Snapshot

  • Resolution: 1.80 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.207 
  • R-Value Observed: 0.209 

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This is version 1.2 of the entry. See complete history


Structural basis for catalytic activation of a serine recombinase.

Keenholtz, R.A.Rowland, S.J.Boocock, M.R.Stark, W.M.Rice, P.A.

(2011) Structure 19: 799-809

  • DOI: https://doi.org/10.1016/j.str.2011.03.017
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Sin resolvase is a site-specific serine recombinase that is normally controlled by a complex regulatory mechanism. A single mutation, Q115R, allows the enzyme to bypass the entire regulatory apparatus, such that no accessory proteins or DNA sites are required. Here, we present a 1.86 Å crystal structure of the Sin Q115R catalytic domain, in a tetrameric arrangement stabilized by an interaction between Arg115 residues on neighboring subunits. The subunits have undergone significant conformational changes from the inactive dimeric state previously reported. The structure provides a new high-resolution view of a serine recombinase active site that is apparently fully assembled, suggesting roles for the conserved active site residues. The structure also suggests how the dimer-tetramer transition is coupled to assembly of the active site. The tetramer is captured in a different rotational substate than that seen in previous hyperactive serine recombinase structures, and unbroken crossover site DNA can be readily modeled into its active sites.

  • Organizational Affiliation

    Department of Biochemistry and Molecular Biology, The University of Chicago, Chicago, IL 60637, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Recombinase Sin
A, B, C, D, E
A, B, C, D, E, F, G, H, I, J, K, L
124Staphylococcus aureusMutation(s): 2 
Gene Names: sinSAP013A_018SAP095A_006SAP096A_020bin3
Find proteins for P20384 (Staphylococcus aureus)
Explore P20384 
Go to UniProtKB:  P20384
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP20384
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on SO4

Download Ideal Coordinates CCD File 
AA [auth I]
BA [auth I]
CA [auth I]
FA [auth J]
GA [auth K]
AA [auth I],
BA [auth I],
CA [auth I],
FA [auth J],
GA [auth K],
IA [auth L],
JA [auth L],
M [auth A],
N [auth A],
O [auth B],
P [auth C],
Q [auth C],
R [auth D],
S [auth D],
T [auth E],
U [auth E],
V [auth F],
W [auth G],
X [auth H],
Y [auth H]
O4 S
Query on GOL

Download Ideal Coordinates CCD File 
DA [auth I],
HA [auth K]
C3 H8 O3
Query on EDO

Download Ideal Coordinates CCD File 
EA [auth I],
Z [auth H]
C2 H6 O2
Experimental Data & Validation

Experimental Data

  • Resolution: 1.80 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.207 
  • R-Value Observed: 0.209 
  • Space Group: P 65
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 128.208α = 90
b = 128.208β = 90
c = 182.015γ = 120
Software Package:
Software NamePurpose
HKL-3000data collection
HKL-3000data reduction
HKL-3000data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2011-06-15
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2012-03-28
    Changes: Database references