3W0E | pdb_00003w0e

Structure of elastase inhibitor AFUEI (crystal form II)

• PDB DOI: https://doi.org/10.2210/pdb3W0E/pdb

• Classification: HYDROLASE INHIBITOR
• Organism(s): Aspergillus fumigatus Af293
• Mutation(s): No 


• Deposited: 2012-10-29 Released: 2013-05-15 
• Deposition Author(s): Imada, K., Sakuma, M., Okumura, Y., Ogawa, K., Nikai, T., Homma, M.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Free: 
  0.256 (Depositor), 0.259 (DCC) 
• R-Value Work: 
  0.211 (Depositor), 0.210 (DCC) 
• R-Value Observed: 
  0.215 (Depositor) 

Starting Model: experimental

Literature

X-ray Structure Analysis and Characterization of AFUEI, an Elastase Inhibitor from Aspergillus fumigatus

Sakuma, M., Imada, K., Okumura, Y., Uchiya, K., Yamashita, N., Ogawa, K., Hijikata, A., Shirai, T., Homma, M., Nikai, T.

(2013) J Biological Chem 288: 17451-17459

• PubMed: 23640894 
• DOI: https://doi.org/10.1074/jbc.M112.433987
• Primary Citation Related Structures: 
  3W0D, 3W0E


• PubMed Abstract: 
  

  Elastase from Aspergillus sp. is an important factor for aspergillosis. AFUEI is an inhibitor of the elastase derived from Aspergillus fumigatus. AFUEI is a member of the I78 inhibitor family and has a high inhibitory activity against elastases of Aspergillus fumigatus and Aspergillus flavus, human neutrophil elastase and bovine chymotrypsin, but does not inhibit bovine trypsin. Here we report the crystal structure of AFUEI in two crystal forms. AFUEI is a wedge-shaped protein composed of an extended loop and a scaffold protein core. The structure of AFUEI shows remarkable similarity to serine protease inhibitors of the potato inhibitor I family, although they are classified into different inhibitor families. A structural comparison with the potato I family inhibitors suggests that the extended loop of AFUEI corresponds to the binding loop of the potato inhibitor I family, and AFUEI inhibits its cognate proteases through the same mechanism as the potato I family inhibitors.

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Organizational Affiliation: 
• Division of Biological Science, Graduate School of Science, Nagoya University, Furo-cho, Chikusa-Ku, Nagoya 464-8602, Japan.

Biological Assembly 1  

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

Biological assembly 1 generated by PISA (software)

Macromolecule Content 

• Total Structure Weight: 15.06 kDa 
• Atom Count: 1,226 
• Modeled Residue Count: 136 
• Deposited Residue Count: 136 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Elastase inhibitor AFUEI	A, B	68	Aspergillus fumigatus Af293	Mutation(s): 0
UniProt
Find proteins for Q4WZ11 (Aspergillus fumigatus (strain ATCC MYA-4609 / CBS 101355 / FGSC A1100 / Af293)) Explore Q4WZ11  Go to UniProtKB:  Q4WZ11

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Free:  0.256 (Depositor), 0.259 (DCC) 
• R-Value Work:  0.211 (Depositor), 0.210 (DCC) 
• R-Value Observed: 0.215 (Depositor) 

Space Group: H 3 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 77.499	α = 90
b = 77.499	β = 90
c = 115.224	γ = 120

Software Package:

Software Name	Purpose
SPring-8	data collection
PHENIX	model building
PHENIX	refinement
MOSFLM	data reduction
SCALA	data scaling
PHENIX	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2013-05-15 
Deposition Author(s): Imada, K., Sakuma, M., Okumura, Y., Ogawa, K., Nikai, T., Homma, M.

Revision History  

• Version 1.0: 2013-05-15
  Type: Initial release
  
• Version 1.1: 2013-07-03
  Changes: Database references
• Version 1.2: 2023-11-08
  Changes: Data collection, Database references, Refinement description
• Version 1.3: 2024-10-30
  Changes: Structure summary