1FM2

THE 2 ANGSTROM CRYSTAL STRUCTURE OF CEPHALOSPORIN ACYLASE

• PDB DOI: https://doi.org/10.2210/pdb1FM2/pdb

• Classification: HYDROLASE
• Organism(s): Brevundimonas diminuta
• Expression System: Escherichia coli
• Mutation(s): Yes 


• Deposited: 2000-08-15 Released: 2001-08-15 
• Deposition Author(s): Kim, Y., Yoon, K.H., Khang, Y., Turley, S., Hol, W.G.J.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Free: 0.230 
• R-Value Work: 0.208 
• R-Value Observed: 0.210 

Literature

The 2.0 A crystal structure of cephalosporin acylase.

Kim, Y., Yoon, K., Khang, Y., Turley, S., Hol, W.G.

(2000) Structure 8: 1059-1068

• PubMed: 11080627 
• DOI: https://doi.org/10.1016/s0969-2126(00)00505-0
• Primary Citation of Related Structures:  
  1FM2


• PubMed Abstract: 
  

  Semisynthetic cephalosporins are primarily synthesized from 7-aminocephalosporanic acid (7-ACA), which is usually obtained by chemical deacylation of cephalosporin C (CPC). The chemical production of 7-ACA includes, however, several expensive steps and requires thorough treatment of chemical wastes. Therefore, an enzymatic conversion of CPC to 7-ACA by cephalosporin acylase is of great interest. The biggest obstacle preventing this in industrial production is that cephalosporin acylase uses glutaryl-7ACA as a primary substrate and has low substrate specificity for CPC.

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Organizational Affiliation: 

School of Chemical Engineering Yeungnam University, Kyungsan 712-749, Dae-Dong, South Korea. [e-mail]

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B1 

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

Macromolecule Content

• Total Structure Weight: 77.25 kDa 
• Atom Count: 5,720 
• Modelled Residue Count: 672 
• Deposited Residue Count: 689 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
GLUTARYL 7-AMINOCEPHALOSPORANIC ACID ACYLASE	A	169	Brevundimonas diminuta	Mutation(s): 1
UniProt
Find proteins for Q9L5D6 (Brevundimonas diminuta) Explore Q9L5D6  Go to UniProtKB:  Q9L5D6

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
GLUTARYL 7-AMINOCEPHALOSPORANIC ACID ACYLASE	B	520	Brevundimonas diminuta	Mutation(s): 12
UniProt
Find proteins for Q9L5D6 (Brevundimonas diminuta) Explore Q9L5D6  Go to UniProtKB:  Q9L5D6

Small Molecules

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
MSE	A	L-PEPTIDE LINKING	C5 H11 N O2 Se		MET

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Free: 0.230 
• R-Value Work: 0.208 
• R-Value Observed: 0.210 
• Space Group: P 4₁ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 73.6	α = 90
b = 73.6	β = 90
c = 380.9	γ = 90

Software Package:

Software Name	Purpose
SHARP	phasing
CNS	refinement
DENZO	data reduction
SCALEPACK	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 2001-08-15 
Deposition Author(s): Kim, Y., Yoon, K.H., Khang, Y., Turley, S., Hol, W.G.J.

Revision History  

• Version 1.0: 2001-08-15
  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: 2018-01-31
  Changes: Experimental preparation