1HJ9

Atomic resolution structures of trypsin provide insight into structural radiation damage


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 0.95 Å
  • R-Value Free: 0.140 

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This is version 1.2 of the entry. See complete history

Literature

Atomic Resolution Structure of Trypsin Provide Insight Into Structural Radiation Damage

Leiros, H.-K.S.Mcsweeney, S.M.Smalas, A.O.

(2001) Acta Crystallogr.,Sect.D 57: 488

  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Radiation damage is an inherent problem in protein X-ray crystallography and the process has recently been shown to be highly specific, exhibiting features such as cleavage of disulfide bonds, decarboxylation of acidic residues, increase in atomic B ...

    Radiation damage is an inherent problem in protein X-ray crystallography and the process has recently been shown to be highly specific, exhibiting features such as cleavage of disulfide bonds, decarboxylation of acidic residues, increase in atomic B factors and increase in unit-cell volume. Reported here are two trypsin structures at atomic resolution (1.00 and 0.95 A), the data for which were collected at a third-generation synchrotron (ESRF) at two different beamlines. Both trypsin structures exhibit broken disulfide bonds; in particular, the bond from Cys191 to Cys220 is very sensitive to synchrotron radiation. The data set collected at the most intense beamline (ID14-EH4) shows increased structural radiation damage in terms of lower occupancies for cysteine residues, more breakage in the six disulfide bonds and more alternate conformations. It appears that high intensity and not only the total X-ray dose is most harmful to protein crystals.


    Organizational Affiliation

    Protein Crystallography Group, Department of Chemistry, Faculty of Science, University of Tromsø, N-9037 Tromsø, Norway.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
BETA-TRYPSIN
A
223Bos taurusMutation(s): 0 
EC: 3.4.21.4
Find proteins for P00760 (Bos taurus)
Go to UniProtKB:  P00760
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

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A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
ANL
Query on ANL

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A
ANILINE
C6 H7 N
PAYRUJLWNCNPSJ-UHFFFAOYSA-N
 Ligand Interaction
GOL
Query on GOL

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A
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
CA
Query on CA

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A
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 0.95 Å
  • R-Value Free: 0.140 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 54.055α = 90.00
b = 56.812β = 90.00
c = 66.282γ = 90.00
Software Package:
Software NamePurpose
DENZOdata reduction
SCALAdata scaling
SHELXL-97refinement

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2002-01-04
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance