1MWB

Solution structure of the recombinant hemoglobin from the cyanobacterium Synechocystis sp. PCC 6803 in its hemichrome state


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with lowest energy and least restraint violations 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

The Solution Structure of the Recombinant Hemoglobin from the Cyanobacterium Synechocystis sp. PCC 6803 in its Hemichrome State

Falzone, C.J.Vu, B.C.Scott, N.L.Lecomte, J.T.

(2002) J Mol Biol 324: 1015-1029

  • DOI: 10.1016/s0022-2836(02)01093-8
  • Primary Citation of Related Structures:  
    1MWB

  • PubMed Abstract: 
  • The product of the cyanobacterium Synechocystis sp. PCC 6803 gene slr2097 is a 123 amino acid polypeptide chain belonging to the truncated hemoglobin family. Recombinant, ferric heme-reconstituted Synechocystis sp. PCC 6803 hemoglobin displays bis-histidine coordination of the iron ion ...

    The product of the cyanobacterium Synechocystis sp. PCC 6803 gene slr2097 is a 123 amino acid polypeptide chain belonging to the truncated hemoglobin family. Recombinant, ferric heme-reconstituted Synechocystis sp. PCC 6803 hemoglobin displays bis-histidine coordination of the iron ion. In addition, this protein is capable of covalently attaching a reactive histidine to the heme 2-vinyl group. The structure of the protein in the low-spin ferric state with intact vinyl substituents was solved by NMR methods. It was found that the structure differs from that of known truncated hemoglobins primarily in the orientation of the E helix, which carries His46 (E10) as the distal ligand to the iron; the length and orientation of the F helix, which carries His70 (F8) as the proximal ligand to the iron; and the H-helix, which carries His117 (H16), the reactive histidine. Regions of enhanced flexibility include the short A helix, the loop connecting the E and F helices, and the last seven residues at the carboxy end. The structural data allowed for the rationalization of physical properties of the cyanobacterial protein, such as fast on-rate for small ligand binding, unstable apoprotein fold, and cross-linking ability. Comparison to the truncated hemoglobin from the green alga Chlamydomonas eugametos also suggested how the endogenous hexacoordination affected the structure.


    Related Citations: 
    • Assignment of the 1H, 13C, and 15N Signals of Synechocystis sp. PCC 6803 Methemoglobin
      Falzone, C.J., Lecomte, J.T.
      (2002) J Biomol NMR 23: 71
    • Cloning, Expression, Purification, and Preliminary Characterization of a Putative Hemoglobin from the Cyanobacterium Synechocystis sp. PCC 6803
      Scott, N.L., Lecomte, J.T.
      (2000) Protein Sci 9: 587

    Organizational Affiliation

    Department of Chemistry and the Center for Biomolecular Structure and Function, The Pennsylvania State University, University Park, PA 16802, USA. cxf14@psu.edu



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
CyanoglobinA123Synechocystis sp. PCC 6803Mutation(s): 0 
Gene Names: slr2097 (glbN)
UniProt
Find proteins for P73925 (Synechocystis sp. (strain PCC 6803 / Kazusa))
Explore P73925 
Go to UniProtKB:  P73925
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP73925
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
HEM
Query on HEM

Download Ideal Coordinates CCD File 
B [auth A]PROTOPORPHYRIN IX CONTAINING FE
C34 H32 Fe N4 O4
KABFMIBPWCXCRK-RGGAHWMASA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with lowest energy and least restraint violations 
  • OLDERADO: 1MWB Olderado

Structure Validation

View Full Validation Report




Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2002-12-04
    Type: Initial release
  • Version 1.1: 2008-04-28
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Source and taxonomy, Version format compliance