5OG5

Cu nitrite reductase serial data at varying temperatures RT 0.21MGy


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.82 Å
  • R-Value Free: 0.209 
  • R-Value Work: 0.174 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Enzyme catalysis captured using multiple structures from one crystal at varying temperatures.

Horrell, S.Kekilli, D.Sen, K.Owen, R.L.Dworkowski, F.S.N.Antonyuk, S.V.Keal, T.W.Yong, C.W.Eady, R.R.Hasnain, S.S.Strange, R.W.Hough, M.A.

(2018) IUCrJ 5: 283-292

  • DOI: 10.1107/S205225251800386X
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • High-resolution crystal structures of enzymes in relevant redox states have transformed our understanding of enzyme catalysis. Recent developments have demonstrated that X-rays can be used, <i>via </i> the generation of solvated electrons, to drive ...

    High-resolution crystal structures of enzymes in relevant redox states have transformed our understanding of enzyme catalysis. Recent developments have demonstrated that X-rays can be used, via the generation of solvated electrons, to drive reactions in crystals at cryogenic temperatures (100 K) to generate 'structural movies' of enzyme reactions. However, a serious limitation at these temperatures is that protein conformational motion can be significantly supressed. Here, the recently developed MSOX (multiple serial structures from one crystal) approach has been applied to nitrite-bound copper nitrite reductase at room temperature and at 190 K, close to the glass transition. During both series of multiple structures, nitrite was initially observed in a 'top-hat' geometry, which was rapidly transformed to a 'side-on' configuration before conversion to side-on NO, followed by dissociation of NO and substitution by water to reform the resting state. Density functional theory calculations indicate that the top-hat orientation corresponds to the oxidized type 2 copper site, while the side-on orientation is consistent with the reduced state. It is demonstrated that substrate-to-product conversion within the crystal occurs at a lower radiation dose at 190 K, allowing more of the enzyme catalytic cycle to be captured at high resolution than in the previous 100 K experiment. At room temperature the reaction was very rapid, but it remained possible to generate and characterize several structural states. These experiments open up the possibility of obtaining MSOX structural movies at multiple temperatures (MSOX-VT), providing an unparallelled level of structural information during catalysis for redox enzymes.


    Organizational Affiliation

    School of Biological Sciences, University of Essex, Wivenhoe Park, Colchester CO4 3SQ, England.,Swiss Light Source, Paul Scherrer Institute, 5232 Villigen PSI, Switzerland.,Molecular Biophysics Group, Institute of Integrative Biology, University of Liverpool, Crown Street, Liverpool L69 7ZB, England.,Scientific Computing Department, STFC Daresbury Laboratory, Warrington WA4 4AD, England.,Diamond Light Source, Harwell Science and Innovation Campus, Didcot OX11 0DE, England.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Copper-containing nitrite reductase
A
334Achromobacter cycloclastesMutation(s): 0 
Gene Names: nirK
EC: 1.7.2.1
Find proteins for P25006 (Achromobacter cycloclastes)
Go to UniProtKB:  P25006
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ACT
Query on ACT

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A
ACETATE ION
C2 H3 O2
QTBSBXVTEAMEQO-UHFFFAOYSA-M
 Ligand Interaction
NO2
Query on NO2

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A
NITRITE ION
N O2
IOVCWXUNBOPUCH-UHFFFAOYSA-M
 Ligand Interaction
CU
Query on CU

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Download CCD File 
A
COPPER (II) ION
Cu
JPVYNHNXODAKFH-UHFFFAOYSA-N
 Ligand Interaction
NO
Query on NO

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Download CCD File 
A
NITRIC OXIDE
Nitrogen monoxide
N O
ODUCDPQEXGNKDN-UHFFFAOYAM
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.82 Å
  • R-Value Free: 0.209 
  • R-Value Work: 0.174 
  • Space Group: P 21 3
Unit Cell:
Length (Å)Angle (°)
a = 96.252α = 90.00
b = 96.252β = 90.00
c = 96.252γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata reduction
REFMACphasing
Aimlessdata scaling
DIALSdata collection

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Biotechnology and Biological Sciences Research CouncilUnited KingdomBB/M022714/1
Biotechnology and Biological Sciences Research CouncilUnited KingdomBB/M020924/1
Leverhulme TrustUnited KingdomRPG-2014-355

Revision History 

  • Version 1.0: 2018-05-23
    Type: Initial release