1SR3 | pdb_00001sr3

Solution structure of the heme chaperone CcmE of Escherichia coli

• PDB DOI: https://doi.org/10.2210/pdb1SR3/pdb
• Entry: 1SR3 supersedes: 1LIZ
• BMRB: 6723

• Classification: CHAPERONE
• Organism(s): Escherichia coli
• Expression System: Escherichia coli
• Mutation(s): No 
• Membrane Protein: Yes  OPM


• Deposited: 2004-03-22 Released: 2004-04-06 
• Deposition Author(s): Enggist, E., Thony-Meyer, L., Guntert, P., Pervushin, K.

---

Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 20 
• Conformers Submitted: 20 
• Selection Criteria: all calculated structures submitted 

Literature

NMR Structure of the Heme Chaperone Ccme Reveals a Novel Functional Motif

Enggist, E., Thony-Meyer, L., Guntert, P., Pervushin, K.

(2002) Structure 10: 1551-1557

• PubMed: 12429096 
• DOI: https://doi.org/10.1016/s0969-2126(02)00885-7
• Primary Citation Related Structures: 
  1SR3


• PubMed Abstract: 
  

  The concept of metal chaperones involves transient binding of metallic cofactors by specific proteins for delivery to enzymes in which they function. Metal chaperones thus provide a protective, as well as a transport, function. We report the first structure of a heme chaperone, CcmE, which comprises these two functions. We propose that the covalent attachment of heme to an exposed histidine occurs after heme binding at the surface of a rigid molecule with a flexible C-terminal domain. CcmE belongs to a family of proteins with a specific fold, which all share a function in delivery of specific molecular cargo.

---

Organizational Affiliation: 
• Institut für Mikrobiologie, Eidgenössische Technische Hochschule, Zürich, Switzerland.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content 

• Total Structure Weight: 15.35 kDa 
• Atom Count: 893 
• Modeled Residue Count: 114 
• Deposited Residue Count: 136 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
APO-CCME	A	136	Escherichia coli	Mutation(s): 0  Gene Names: CCME Membrane Entity: Yes
UniProt
Find proteins for P69490 (Escherichia coli (strain K12)) Explore P69490  Go to UniProtKB:  P69490

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 20 
• Conformers Submitted: 20 
• Selection Criteria: all calculated structures submitted 

Structure Validation

Entry History 

Deposition Data

• Released Date: 2004-04-06 
Deposition Author(s): Enggist, E., Thony-Meyer, L., Guntert, P., Pervushin, K.
• This entry supersedes: 1LIZ

Revision History  

• Version 1.0: 2004-04-06
  Type: Initial release
  
• Version 1.1: 2008-04-29
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2022-03-02
  Changes: Data collection, Database references, Derived calculations
• Version 1.4: 2024-05-29
  Changes: Data collection