1J6Q

Solution structure and characterization of the heme chaperone CcmE


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Submitted: 

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This is version 1.3 of the entry. See complete history


Literature

Solution structure and characterization of the heme chaperone CcmE

Arnesano, F.Banci, L.Barker, P.D.Bertini, I.Rosato, A.Su, X.C.Viezzoli, M.S.

(2002) Biochemistry 41: 13587-13594

  • DOI: 10.1021/bi026362w
  • Primary Citation of Related Structures:  
    1J6Q, 1LM0

  • PubMed Abstract: 
  • The covalent attachment of the heme cofactor in c-type cytochromes is a surprisingly complex process, which in bacteria involves a number of different proteins. Among the latter, the ccmE gene product is known to perform a key role in the heme delivery pathway in Gram-negative bacteria ...

    The covalent attachment of the heme cofactor in c-type cytochromes is a surprisingly complex process, which in bacteria involves a number of different proteins. Among the latter, the ccmE gene product is known to perform a key role in the heme delivery pathway in Gram-negative bacteria. The solution structure of the soluble domain of apo-CcmE from Shewanella putrefaciens was determined through NMR spectroscopy on a 13C,15N-labeled sample. The structure is characterized by a compact core with large regions of beta structure, while the N-terminal and C-terminal regions are essentially unstructured. The overall folding is similar to that of the so-called oligo-binding proteins (OB fold). Solvent-exposed aromatic residues, conserved in all CcmE homologues, have been found in the proximity of His131, the putative heme-binding residue, that could have a role in the interaction with heme. No interaction between CcmE and heme, as well as between CcmE and holocytochrome c, could be detected in vitro by electronic spectroscopy or by NMR. The data available suggest that the heme transfer process is likely to involve a heterooligomeric protein complex and occur under a tight enzymatic control.


    Organizational Affiliation

    Magnetic Resonance Center, University of Florence, Sesto Fiorentino, Italy.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
cytochrome c maturation protein EA136Shewanella putrefaciensMutation(s): 0 
Gene Names: ccmE
UniProt
Find proteins for Q8EK44 (Shewanella oneidensis (strain MR-1))
Explore Q8EK44 
Go to UniProtKB:  Q8EK44
Entity Groups  
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UniProt GroupQ8EK44
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Submitted: 
  • OLDERADO: 1J6Q Olderado

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2002-12-25
    Type: Initial release
  • Version 1.1: 2008-04-28
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2022-02-23
    Changes: Data collection, Database references, Derived calculations