1HTL | pdb_00001htl

MUTATION OF A BURIED RESIDUE CAUSES LACK OF ACTIVITY BUT NO CONFORMATIONAL CHANGE: CRYSTAL STRUCTURE OF E. COLI HEAT-LABILE ENTEROTOXIN MUTANT VAL 97--> LYS

• PDB DOI: https://doi.org/10.2210/pdb1HTL/pdb

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


• Deposited: 1995-02-15 Released: 1995-04-20 
• Deposition Author(s): Merritt, E.A., Hol, W.G.J.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.50 Å
• R-Value Work: 
  0.205 (Depositor), 0.194 (DCC) 
• R-Value Observed: 
  0.205 (Depositor) 

Literature

Mutation of a buried residue causes loss of activity but no conformational change in the heat-labile enterotoxin of Escherichia coli.

Merritt, E.A., Sarfaty, S., Pizza, M., Domenighini, M., Rappuoli, R., Hol, W.G.

(1995) Nat Struct Biol 2: 269-272

• PubMed: 7796260 
• DOI: https://doi.org/10.1038/nsb0495-269
• Primary Citation Related Structures: 
  1HTL

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 7-mer - A5B1C1 Local Symmetry: Cyclic - C5  (Explore in 3D)
Local Stoichiometry: Homo 5-mer - A5 

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

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

Macromolecule Content 

• Total Structure Weight: 86.94 kDa 
• Atom Count: 6,102 
• Modeled Residue Count: 741 
• Deposited Residue Count: 755 
• Unique protein chains: 3

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
HEAT-LABILE ENTEROTOXIN, SUBUNIT B	A [auth D], B [auth E], C [auth F], D [auth G], E [auth H]	103	Escherichia coli	Mutation(s): 0
UniProt
Find proteins for P32890 (Escherichia coli) Explore P32890  Go to UniProtKB:  P32890

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
HEAT-LABILE ENTEROTOXIN, SUBUNIT A	F [auth A]	191	Escherichia coli	Mutation(s): 0
UniProt
Find proteins for P06717 (Escherichia coli) Explore P06717  Go to UniProtKB:  P06717

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
HEAT-LABILE ENTEROTOXIN, SUBUNIT A	G [auth C]	49	Escherichia coli	Mutation(s): 0
UniProt
Find proteins for P06717 (Escherichia coli) Explore P06717  Go to UniProtKB:  P06717

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.50 Å
• R-Value Work:  0.205 (Depositor), 0.194 (DCC) 
• R-Value Observed: 0.205 (Depositor) 

Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 118.8	α = 90
b = 98	β = 90
c = 64.8	γ = 90

Software Package:

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

Structure Validation

Entry History 

Deposition Data

• Released Date: 1995-04-20 
Deposition Author(s): Merritt, E.A., Hol, W.G.J.

Revision History  

• Version 1.0: 1995-04-20
  Type: Initial release
  
• Version 1.1: 2008-03-21
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2024-06-05
  Changes: Data collection, Database references, Other
• Version 1.4: 2024-10-23
  Changes: Structure summary