Structure of MPT-1, a GDP-Man-dependent mannosyltransferase from Leishmania mexicana

Experimental Data Snapshot

  • Resolution: 1.55 Å
  • R-Value Free: 0.213 
  • R-Value Work: 0.149 
  • R-Value Observed: 0.153 

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

  • 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. 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.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
LmxM MPT-1
A, B
348Leishmania mexicana MHOM/GT/2001/U1103Mutation(s): 0 
Gene Names: LMXM_10_1230
Find proteins for E9AND7 (Leishmania mexicana (strain MHOM/GT/2001/U1103))
Explore E9AND7 
Go to UniProtKB:  E9AND7
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupE9AND7
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

Unit Cell:
Length ( Å )Angle ( ˚ )
a = 46.478α = 94.48
b = 48.116β = 96.92
c = 73.887γ = 110.29
Software Package:
Software NamePurpose
DIALSdata reduction
Aimlessdata scaling

Structure Validation

View Full Validation Report

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: 2021-02-17
    Changes: Database references
  • Version 1.3: 2024-01-24
    Changes: Data collection, Database references, Refinement description