6Q4Y

Structure of MPT-2, a GDP-Man-dependent mannosyltransferase from Leishmania mexicana, in complex with mannose


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.213 
  • R-Value Work: 0.174 
  • R-Value Observed: 0.176 

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This is version 1.3 of the entry. See complete history


Literature

A Family of Dual-Activity Glycosyltransferase-Phosphorylases Mediates Mannogen Turnover and Virulence in Leishmania Parasites.

Sernee, M.F.Ralton, J.E.Nero, T.L.Sobala, L.F.Kloehn, J.Vieira-Lara, M.A.Cobbold, S.A.Stanton, L.Pires, D.E.V.Hanssen, E.Males, A.Ward, T.Bastidas, L.M.van der Peet, P.L.Parker, M.W.Ascher, D.B.Williams, S.J.Davies, G.J.McConville, M.J.

(2019) Cell Host Microbe 26: 385-399.e9

  • DOI: 10.1016/j.chom.2019.08.009
  • Primary Citation of Related Structures:  
    6Q4X, 6Q4W, 6Q50, 6Q4Z, 6Q4Y

  • PubMed Abstract: 
  • Parasitic protists belonging to the genus Leishmania synthesize the non-canonical carbohydrate reserve, mannogen, which is composed of β-1,2-mannan oligosaccharides. Here, we identify a class of dual-activity mannosyltransferase/phosphorylases (MTPs) that catalyze both the sugar nucleotide-dependent biosynthesis and phosphorolytic turnover of mannogen ...

    Parasitic protists belonging to the genus Leishmania synthesize the non-canonical carbohydrate reserve, mannogen, which is composed of β-1,2-mannan oligosaccharides. Here, we identify a class of dual-activity mannosyltransferase/phosphorylases (MTPs) that catalyze both the sugar nucleotide-dependent biosynthesis and phosphorolytic turnover of mannogen. Structural and phylogenic analysis shows that while the MTPs are structurally related to bacterial mannan phosphorylases, they constitute a distinct family of glycosyltransferases (GT108) that have likely been acquired by horizontal gene transfer from gram-positive bacteria. The seven MTPs catalyze the constitutive synthesis and turnover of mannogen. This metabolic rheostat protects obligate intracellular parasite stages from nutrient excess, and is essential for thermotolerance and parasite infectivity in the mammalian host. Our results suggest that the acquisition and expansion of the MTP family in Leishmania increased the metabolic flexibility of these protists and contributed to their capacity to colonize new host niches.


    Organizational Affiliation

    Department of Biochemistry and Molecular Biology, Bio21 Molecular Science and Biotechnology Institute, University of Melbourne, Parkville, VIC 3010, Australia. Electronic address: malcolmm@unimelb.edu.au.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
LmxM MPT-2A, B341Leishmania mexicana MHOM/GT/2001/U1103Mutation(s): 0 
Gene Names: LMXM_10_1240
UniProt
Find proteins for E9AND8 (Leishmania mexicana (strain MHOM/GT/2001/U1103))
Explore E9AND8 
Go to UniProtKB:  E9AND8
Protein Feature View
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  • Reference Sequence
Small Molecules
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.213 
  • R-Value Work: 0.174 
  • R-Value Observed: 0.176 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 55.237α = 90
b = 97.138β = 90
c = 105.55γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
DIALSdata reduction
Aimlessdata scaling
REFMACphasing

Structure Validation

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Ligand Structure Quality Assessment  



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Australian Research CouncilAustraliaDP160100597
Australian Research CouncilAustraliaDP180101957
Biotechnology and Biological Sciences Research CouncilUnited KingdomBB/M011151
European Research CouncilUnited KingdomERC-2012-AdG-322942

Revision History  (Full details and data files)

  • Version 1.0: 2019-09-18
    Type: Initial release
  • Version 1.1: 2019-09-25
    Changes: Data collection, Database references
  • Version 1.2: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Data collection, Derived calculations, Structure summary
  • Version 1.3: 2021-02-17
    Changes: Database references, Structure summary