Crystal structure of the shikimate kinase + 3-dehydroquinate dehydratase + 3-dehydroshikimate dehydrogenase domains of Aro1 from Candida albicans

Experimental Data Snapshot

  • Resolution: 2.30 Å
  • R-Value Free: 0.226 
  • R-Value Work: 0.178 
  • R-Value Observed: 0.179 

wwPDB Validation   3D Report Full Report

This is version 1.2 of the entry. See complete history


Molecular analysis and essentiality of Aro1 shikimate biosynthesis multi-enzyme in Candida albicans.

Stogios, P.J.Liston, S.D.Semper, C.Quade, B.Michalska, K.Evdokimova, E.Ram, S.Otwinowski, Z.Borek, D.Cowen, L.E.Savchenko, A.

(2022) Life Sci Alliance 5

  • DOI: https://doi.org/10.26508/lsa.202101358
  • Primary Citation of Related Structures:  
    6C5C, 7TBU, 7TBV, 7U5S, 7U5T, 7U5U

  • PubMed Abstract: 

    In the human fungal pathogen Candida albicans , ARO1 encodes an essential multi-enzyme that catalyses consecutive steps in the shikimate pathway for biosynthesis of chorismate, a precursor to folate and the aromatic amino acids. We obtained the first molecular image of C. albicans Aro1 that reveals the architecture of all five enzymatic domains and their arrangement in the context of the full-length protein. Aro1 forms a flexible dimer allowing relative autonomy of enzymatic function of the individual domains. Our activity and in cellulo data suggest that only four of Aro1's enzymatic domains are functional and essential for viability of C. albicans , whereas the 3-dehydroquinate dehydratase (DHQase) domain is inactive because of active site substitutions. We further demonstrate that in C. albicans , the type II DHQase Dqd1 can compensate for the inactive DHQase domain of Aro1, suggesting an unrecognized essential role for this enzyme in shikimate biosynthesis. In contrast, in Candida glabrata and Candida parapsilosis , which do not encode a Dqd1 homolog, Aro1 DHQase domains are enzymatically active, highlighting diversity across Candida species.

  • Organizational Affiliation

    Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto, Canada.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Pentafunctional AROM polypeptide
A, B, C, D
696Candida albicans Ca6Mutation(s): 0 
Find proteins for Q5AME2 (Candida albicans (strain SC5314 / ATCC MYA-2876))
Explore Q5AME2 
Go to UniProtKB:  Q5AME2
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ5AME2
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on GOL

Download Ideal Coordinates CCD File 
G [auth A]
H [auth A]
I [auth A]
J [auth A]
L [auth B]
G [auth A],
H [auth A],
I [auth A],
J [auth A],
L [auth B],
M [auth B],
O [auth C],
P [auth C],
S [auth D],
T [auth D],
U [auth D],
V [auth D],
W [auth D]
C3 H8 O3
Query on CL

Download Ideal Coordinates CCD File 
F [auth A],
R [auth D]
Query on MG

Download Ideal Coordinates CCD File 
E [auth A],
K [auth B],
N [auth C],
Q [auth D]
Experimental Data & Validation

Experimental Data

  • Resolution: 2.30 Å
  • R-Value Free: 0.226 
  • R-Value Work: 0.178 
  • R-Value Observed: 0.179 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 77.682α = 90
b = 89.239β = 90.283
c = 270.708γ = 90
Software Package:
Software NamePurpose
HKL-3000data reduction
HKL-3000data scaling
PHENIXmodel building
Cootmodel building

Structure Validation

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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)United StatesHHSN272201700060C

Revision History  (Full details and data files)

  • Version 1.0: 2022-03-16
    Type: Initial release
  • Version 1.1: 2022-11-23
    Changes: Database references
  • Version 1.2: 2023-10-25
    Changes: Data collection, Refinement description