1E29

PSII associated cytochrome C549 from Synechocystis sp.

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.21 Å
  • R-Value Free: 0.212 
  • R-Value Observed: 0.149 

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This is version 1.6 of the entry. See complete history. 


Literature

Crystal Structure of Low-Potential Cytochrome C549 from Synechocystis Sp. Pcc 6803 at 1.21A Resolution

Frazao, C., Enguita, F.J., Coelho, R., Sheldrick, G.M., Navarro, J.A., Hervas, M., De La Rosa, M.A., Carrondo, M.A.

(2001) J Biol Inorg Chem 6: 324

  • DOI: 10.1007/s007750100208
  • Primary Citation of Related Structures:  
    1E29

  • PubMed Abstract: 

    • The crystal structure of low-potential cytochrome c549, an extrinsic component of the photosystem II (PS II) from Synechocystis sp. PCC 6803, was obtained directly from single-wavelength 1.21 A resolution diffraction data. This is the first monodomain bis-histidinyl monoheme cytochrome c to be structurally characterized ...

    The crystal structure of low-potential cytochrome c549, an extrinsic component of the photosystem II (PS II) from Synechocystis sp. PCC 6803, was obtained directly from single-wavelength 1.21 A resolution diffraction data. This is the first monodomain bis-histidinyl monoheme cytochrome c to be structurally characterized. The extended N-terminal region of c549 builds up a two-strand antiparallel beta-sheet in a hairpin motif, which extends through two molecules owing to crystal packing. Both peptide termini are involved in crystal contacts, which may explain their protrusion out of the globular fold. The C-terminus is preceded by a 9 A-long hydrophobic finger extending from a positively charged base and could be involved in PSII interactions, as well as a protruding negative patch built by a set of conserved acidic residues among c549 sequences.

    Organizational Affiliation: 

    Instituto de Tecnologia Química e Biológica, Universidade Nova de Lisboa, 2781-901 Oeiras, Portugal.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
CYTOCHROME C549A135Synechocystis sp.Mutation(s): 0 
UniProt
Find proteins for Q55013 (Synechocystis sp. (strain PCC 6803 / Kazusa))
Explore Q55013 
Go to UniProtKB:  Q55013
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ55013
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
HEC
Query on HEC
Download Ideal Coordinates CCD File 
B [auth A]HEME C
C34 H34 Fe N4 O4
HXQIYSLZKNYNMH-LJNAALQVSA-N		 Ligand Interaction
CA
Query on CA
Download Ideal Coordinates CCD File 
C [auth A],
D [auth A],
E [auth A]		CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.21 Å
  • R-Value Free: 0.212 
  • R-Value Observed: 0.149 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 34.22α = 90
b = 86.86β = 90
c = 97.66γ = 90
Software Package:
Software NamePurpose
SHELXL-97refinement
DENZOdata reduction
SCALEPACKdata scaling
SHELXDphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2001-05-04
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2017-07-12
    Changes: Derived calculations
  • Version 1.4: 2019-05-08
    Changes: Data collection, Experimental preparation
  • Version 1.5: 2019-05-22
    Changes: Data collection, Refinement description
  • Version 1.6: 2019-07-24
    Changes: Data collection