1PMI

Candida Albicans Phosphomannose Isomerase

• PDB DOI: https://doi.org/10.2210/pdb1PMI/pdb

• Classification: ISOMERASE
• Organism(s): Candida albicans
• Mutation(s): No 


• Deposited: 1996-04-03 Released: 1997-03-01 
• Deposition Author(s): Cleasby, A., Skarzynski, T., Wonacott, A., Davies, G.J., Hubbard, R.E., Proudfoot, A.E.I., Wells, T.N.C., Payton, M.A., Bernard, A.R.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.70 Å
• R-Value Work: 0.184 

Literature

The x-ray crystal structure of phosphomannose isomerase from Candida albicans at 1.7 angstrom resolution.

Cleasby, A., Wonacott, A., Skarzynski, T., Hubbard, R.E., Davies, G.J., Proudfoot, A.E., Bernard, A.R., Payton, M.A., Wells, T.N.

(1996) Nat Struct Biol 3: 470-479

• PubMed: 8612079 
• DOI: https://doi.org/10.1038/nsb0596-470
• Primary Citation of Related Structures:  
  1PMI


• PubMed Abstract: 
  

  Phosphomannose isomerase (PMI) catalyses the reversible isomerization of fructose-6-phosphate (F6P) and mannose-6-phosphate (M6P). Absence of PMI activity in yeasts causes cell lysis and thus the enzyme is a potential target for inhibition and may be a route to antifungal drugs. The 1.7 A crystal structure of PMI from Candida albicans shows that the enzyme has three distinct domains. The active site lies in the central domain, contains a single essential zinc atom, and forms a deep, open cavity of suitable dimensions to contain M6P or F6P The central domain is flanked by a helical domain on one side and a jelly-roll like domain on the other.

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Organizational Affiliation: 

Glaxo Wellcome Research and Development, Department of Biomolecular Structure, Stevenage, UK.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 48.86 kDa 
• Atom Count: 3,754 
• Modelled Residue Count: 440 
• Deposited Residue Count: 440 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
PHOSPHOMANNOSE ISOMERASE	A	440	Candida albicans	Mutation(s): 0  EC: 5.3.1.8
UniProt
Find proteins for P34948 (Candida albicans (strain SC5314 / ATCC MYA-2876)) Explore P34948  Go to UniProtKB:  P34948

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
ZN	B [auth A]	ZINC ION Zn PTFCDOFLOPIGGS-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.70 Å
• R-Value Work: 0.184 
• Space Group: C 1 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 124.83	α = 90
b = 52.92	β = 127.54
c = 85.73	γ = 90

Software Package:

Software Name	Purpose
PROLSQ	refinement
MOSFLM	data reduction

Structure Validation

Entry History 

Deposition Data

• Released Date: 1997-03-01 
Deposition Author(s): Cleasby, A., Skarzynski, T., Wonacott, A., Davies, G.J., Hubbard, R.E., Proudfoot, A.E.I., Wells, T.N.C., Payton, M.A., Bernard, A.R.

Revision History  

• Version 1.0: 1997-03-01
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2024-02-14
  Changes: Data collection, Database references, Derived calculations, Other