2QZX

Secreted aspartic proteinase (Sap) 5 from Candida albicans


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.224 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

X-ray structures of Sap1 and Sap5: Structural comparison of the secreted aspartic proteinases from Candida albicans.

Borelli, C.Ruge, E.Lee, J.H.Schaller, M.Vogelsang, A.Monod, M.Korting, H.C.Huber, R.Maskos, K.

(2008) Proteins 72: 1308-1319

  • DOI: 10.1002/prot.22021
  • Primary Citation of Related Structures:  
    2QZX, 2QZW

  • PubMed Abstract: 
  • Proteolytic activity is an important virulence factor for Candida albicans (C. albicans). It is attributed to the family of the secreted aspartic proteinases (Saps) from C. albicans with a minimum of 10 members. Saps show controlled expression and regulation for the individual stages of the infection process ...

    Proteolytic activity is an important virulence factor for Candida albicans (C. albicans). It is attributed to the family of the secreted aspartic proteinases (Saps) from C. albicans with a minimum of 10 members. Saps show controlled expression and regulation for the individual stages of the infection process. Distinct isoenzymes can be responsible for adherence and tissue damage of local infections, while others cause systemic diseases. Earlier, only the structures of Sap2 and Sap3 were known. In our research, we have now succeeded in solving the X-ray crystal structures of the apoenzyme of Sap1 and Sap5 in complex with pepstatin A at 2.05 and 2.5 A resolution, respectively. With the structure of Sap1, we have completed the set of structures of isoenzyme subgroup Sap1-3. Of subgroup Sap4-6, the structure of the enzyme Sap5 is the first structure that has been described up to now. This facilitates comparison of structural details as well as inhibitor binding modes among the different subgroup members. Structural analysis reveals a highly conserved overall secondary structure of Sap1-3 and Sap5. However, Sap5 clearly differs from Sap1-3 by its electrostatic overall charge as well as through structural conformation of its entrance to the active site cleft. Design of inhibitors specific for Sap5 should concentrate on the S4 and S3 pockets, which significantly differ from Sap1-3 in size and electrostatic charge. Both Sap1 and Sap5 seem to play a major part in superficial Candida infections. Determination of the isoenzymes' structures can contribute to the development of new Sap-specific inhibitors for the treatment of superficial infections with a structure-based drug design program.


    Organizational Affiliation

    Department of Dermatology and Allergy, Ludwig Maximilian University, 80337 Munich, Germany. claudia.borelli@med.uni-muenchen.de



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Candidapepsin-5A, B342Candida albicansMutation(s): 0 
EC: 3.4.23.24
Find proteins for P43094 (Candida albicans (strain SC5314 / ATCC MYA-2876))
Explore P43094 
Go to UniProtKB:  P43094
Protein Feature View
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  • Reference Sequence
  • Find similar proteins by:  Sequence   |   Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
PepstatinC, D6Streptomyces argenteolus subsp. toyonakensisMutation(s): 0 
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
IHNIC50 :  6   nM  PDBBind
Biologically Interesting Molecules (External Reference) 1 Unique
Entity ID: 2
IDChainsNameType/Class2D Diagram3D Interactions
PRD_000557
Query on PRD_000557
C, DPepstatinOligopeptide /  Enzyme inhibitor

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Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.224 
  • Space Group: P 41 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 92.196α = 90
b = 92.196β = 90
c = 182.005γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
CNSrefinement
PDB_EXTRACTdata extraction
PHASERphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2008-07-08
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Atomic model, Database references, Derived calculations, Non-polymer description, Structure summary, Version format compliance
  • Version 1.2: 2013-02-27
    Changes: Other
  • Version 1.3: 2017-10-25
    Changes: Advisory, Refinement description