Crystal structure of C. albicans Thi5 H66G mutant

Experimental Data Snapshot

  • Resolution: 1.60 Å
  • R-Value Free: 0.191 
  • R-Value Work: 0.162 
  • R-Value Observed: 0.164 

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Thiamin pyrimidine biosynthesis in Candida albicans : a remarkable reaction between histidine and pyridoxal phosphate.

Lai, R.Y.Huang, S.Fenwick, M.K.Hazra, A.Zhang, Y.Rajashankar, K.Philmus, B.Kinsland, C.Sanders, J.M.Ealick, S.E.Begley, T.P.

(2012) J Am Chem Soc 134: 9157-9159

  • DOI: https://doi.org/10.1021/ja302474a
  • Primary Citation of Related Structures:  
    4ESW, 4ESX

  • PubMed Abstract: 

    In Saccharomyces cerevisiae , thiamin pyrimidine is formed from histidine and pyridoxal phosphate (PLP). The origin of all of the pyrimidine atoms has been previously determined using labeling studies and suggests that the pyrimidine is formed using remarkable chemistry that is without chemical or biochemical precedent. Here we report the overexpression of the closely related Candida albicans pyrimidine synthase (THI5p) and the reconstitution and preliminary characterization of the enzymatic activity. A structure of the C. albicans THI5p shows PLP bound at the active site via an imine with Lys62 and His66 in close proximity to the PLP. Our data suggest that His66 of the THI5 protein is the histidine source for pyrimidine formation and that the pyrimidine synthase is a single-turnover enzyme.

  • Organizational Affiliation

    Department of Chemistry, Texas A&M University, College Station, 77843, United States.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Pyrimidine biosynthesis enzyme THI13
A, B
342Candida albicans WO-1Mutation(s): 1 
Gene Names: CAWG_02199
Find proteins for C4YMW2 (Candida albicans (strain WO-1))
Explore C4YMW2 
Go to UniProtKB:  C4YMW2
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupC4YMW2
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.60 Å
  • R-Value Free: 0.191 
  • R-Value Work: 0.162 
  • R-Value Observed: 0.164 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 55.386α = 90
b = 99.474β = 90
c = 126.389γ = 90
Software Package:
Software NamePurpose
SCALEPACKdata scaling
PDB_EXTRACTdata extraction
ADSCdata collection
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-09-19
    Type: Initial release
  • Version 1.1: 2018-01-24
    Changes: Structure summary