2QZX

Secreted aspartic proteinase (Sap) 5 from Candida albicans


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 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:  

  • 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 re ...

    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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Candidapepsin-5
A, B
342Candida albicans (strain SC5314 / ATCC MYA-2876)Mutation(s): 0 
Gene Names: SAP5
EC: 3.4.23.24
Find proteins for P43094 (Candida albicans (strain SC5314 / ATCC MYA-2876))
Go to UniProtKB:  P43094
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Pepstatin
C, D
6N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Small Molecules
Biologically Interesting Molecules 1 Unique
IDChainsNameType/Class2D Diagram3D Interactions
PRD_000557
Query on PRD_000557
C,DPepstatinOligopeptide / Enzyme inhibitor

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External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
IHNIC50: 6 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 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 = 90.00
b = 92.196β = 90.00
c = 182.005γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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