Biological Assembly 1  

 3D View: Structure | 1D-3D View | Electron Density | Validation Report | Ligand Interaction

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 23.92 kDa 
• Atom Count: 1819 
• Modelled Residue Count: 214 
• Deposited Residue Count: 214 
• Unique protein chains: 1

1CPM

NATIVE-LIKE IN VIVO FOLDING OF A CIRCULARLY PERMUTED JELLYROLL PROTEIN SHOWN BY CRYSTAL STRUCTURE ANALYSIS

• PDB DOI: 10.2210/pdb1CPM/pdb

• Classification: HYDROLASE(GLUCANASE)
• Organism(s): Paenibacillus macerans
• Mutation(s): No 


• Deposited: 1994-03-11 Released: 1994-06-22 
• Deposition Author(s): Hahn, M., Heinemann, U.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Work: 0.153 
• R-Value Observed: 0.153 

Literature

Native-like in vivo folding of a circularly permuted jellyroll protein shown by crystal structure analysis.

Hahn, M., Piotukh, K., Borriss, R., Heinemann, U.

(1994) Proc Natl Acad Sci U S A 91: 10417-10421

• PubMed: 7937966 
• DOI: 10.1073/pnas.91.22.10417
• Primary Citation of Related Structures:  
  1CPM, 1CPN


• PubMed Abstract: 
  

A jellyroll beta-sandwich protein, the Bacillus beta-glucanase H(A16-M), is used to probe the role of N-terminal peptide regions in protein folding in vivo. A gene encoding H(A16-M) is rearranged to place residues 1-58 of the protein behind a signal peptide and residues 59-214. The rearranged gene is expressed in Escherichia coli. The resultant circularly permuted protein, cpA16M-59, is secreted into the periplasm, correctly processed, and folded into a stable and active enzyme. Crystal structure analysis at 2.0-A resolution, R = 15.3%, shows cpA16M-59 to have a three-dimensional structure nearly identical with that of the parent beta-glucanase. An analogous experiment based on the wild-type Bacillus macerans beta-glucanase, giving rise to the circularly permuted variant cpMAC-57, yields the same results. Folding of these proteins, therefore, is not a vectorial process depending on the conformation adopted by their native N-terminal oligopeptides after ribosomal synthesis and translocation through the cytoplasmic membrane.

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Related Citations: 

• Molecular and Active-Site Structure of a Bacillus 1,3-1,4-Beta-Glucanase
  Keitel, T., Simon, O., Borriss, R., Heinemann, U.
  (1993) Proc Natl Acad Sci U S A 90: 5287

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Organizational Affiliation: 

Max-Delbrück-Centrum für Molekulare Medizin, Berlin, Germany.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
CIRCULARLY PERMUTED	A	214	Paenibacillus macerans	Mutation(s): 0  EC: 3.2.1.73
UniProt
Find proteins for P23904 (Paenibacillus macerans) Explore P23904  Go to UniProtKB:  P23904

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
CA	B [auth A]	CALCIUM ION Ca BHPQYMZQTOCNFJ-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Work: 0.153 
• R-Value Observed: 0.153 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 39.43	α = 90
b = 44.3	β = 90
c = 128.34	γ = 90

Software Package:

Software Name	Purpose
X-PLOR	model building
TNT	refinement
X-PLOR	refinement
X-PLOR	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1994-03-11 
• Released Date: 1994-06-22 
Deposition Author(s): Hahn, M., Heinemann, U.

Revision History  

• Version 1.0: 1994-06-22
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2017-11-29
  Changes: Derived calculations, Other
• Version 1.4: 2019-07-17
  Changes: Data collection, Refinement description
• Version 1.5: 2019-08-14
  Changes: Data collection, Refinement description