1ASA | pdb_00001asa

THE STRUCTURAL BASIS FOR THE REDUCED ACTIVITY OF THE Y226F(Y225F) ACTIVE SITE MUTANT OF E. COLI ASPARTATE AMINOTRANSFERASE

• PDB DOI: https://doi.org/10.2210/pdb1ASA/pdb

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


• Deposited: 1993-08-27 Released: 1994-04-30 
• Deposition Author(s): Schumacher, C., Ringe, D.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.40 Å
• R-Value Work: 
  0.198 (Depositor) 
• R-Value Observed: 
  0.198 (Depositor) 

Literature

The Structural Basis for the Reduced Activity of the Y226F(Y225F) Active Site Mutant of E. Coli Aspartate Aminotransferase

Schumacher, C., Ringe, D.

To be published.

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 2-mer - A2 

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

Macromolecule Content 

• Total Structure Weight: 43.98 kDa 
• Atom Count: 3,108 
• Modeled Residue Count: 396 
• Deposited Residue Count: 396 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
ASPARTATE AMINOTRANSFERASE	A	396	Escherichia coli	Mutation(s): 0  EC: 2.6.1.1
UniProt
Find proteins for P00509 (Escherichia coli (strain K12)) Explore P00509  Go to UniProtKB:  P00509

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
PLP	B [auth A]	PYRIDOXAL-5'-PHOSPHATE C8 H10 N O6 P NGVDGCNFYWLIFO-UHFFFAOYSA-N
MAE	C [auth A]	MALEIC ACID C4 H4 O4 VZCYOOQTPOCHFL-UPHRSURJSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.40 Å
• R-Value Work:  0.198 (Depositor) 
• R-Value Observed: 0.198 (Depositor) 

Space Group: C 2 2 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 157.5	α = 90
b = 84.8	β = 90
c = 78.2	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: 1994-04-30 
Deposition Author(s): Schumacher, C., Ringe, D.

Revision History  

• Version 1.0: 1994-04-30
  Type: Initial release
  
• Version 1.1: 2008-03-03
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Derived calculations, Version format compliance
• Version 1.3: 2024-06-05
  Changes: Data collection, Database references, Derived calculations, Other