1QCB | pdb_00001qcb

ESCHERICHIA COLI HEAT LABILE ENTEROTOXIN TYPE IIB B-PENTAMER

• PDB DOI: https://doi.org/10.2210/pdb1QCB/pdb

• Classification: ENTEROTOXIN
• Organism(s): Escherichia coli
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 1999-04-30 Released: 2003-06-10 
• Deposition Author(s): Merritt, E.A., Hol, W.G.J.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.20 Å
• R-Value Free: 
  0.259 (Depositor), 0.243 (DCC) 
• R-Value Work: 
  0.193 (Depositor), 0.189 (DCC) 

Literature

Crystal Structures of the B-Pentamer from E. coli Enterotoxin LT-IIb

Merritt, E.A., van den Akker, F., Connell, T.D., Holmes, R.K., Hol, W.G.J.

To be published.

Biological Assembly 1  

Global Symmetry: Cyclic - C5  (Explore in 3D)
Global Stoichiometry: Homo 5-mer - A5 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content 

• Total Structure Weight: 53.89 kDa 
• Atom Count: 3,901 
• Modeled Residue Count: 495 
• Deposited Residue Count: 495 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
PROTEIN (HEAT LABILE ENTEROTOXIN TYPE IIB B-PENTAMER)	A [auth D], B [auth E], C [auth F], D [auth G], E [auth H]	99	Escherichia coli	Mutation(s): 0
UniProt
Find proteins for P43529 (Escherichia coli) Explore P43529  Go to UniProtKB:  P43529

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.20 Å
• R-Value Free:  0.259 (Depositor), 0.243 (DCC) 
• R-Value Work:  0.193 (Depositor), 0.189 (DCC) 

Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 48.7	α = 90
b = 69	β = 90
c = 155	γ = 90

Software Package:

Software Name	Purpose
X-GEN	data scaling
MACRO	data reduction
AMoRE	phasing
X-PLOR	refinement
X-GEN	data reduction
MACRO	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 2003-06-10 
Deposition Author(s): Merritt, E.A., Hol, W.G.J.

Revision History  

• Version 1.0: 2003-06-10
  Type: Initial release
  
• Version 1.1: 2008-04-27
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2017-10-04
  Changes: Refinement description
• Version 1.4: 2018-04-04
  Changes: Data collection
• Version 1.5: 2021-07-28
  Changes: Refinement description
• Version 1.6: 2024-10-30
  Changes: Data collection, Database references, Structure summary