Rights statement: ACS Author Choice CC-BY
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Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Probing enzymes late in the trypanosomal glycosylphosphatidylinositol biosynthetic pathway with synthetic glycosylphosphatidylinositol analogues
AU - Urbaniak, Michael D.
AU - Yashunsky, Dmitry V.
AU - Crossman, Arthur
AU - Nikolaev, Andrei V.
AU - Ferguson, Michael A. J.
N1 - ACS Author Choice CC-BY
PY - 2008/10/17
Y1 - 2008/10/17
N2 - Glycosylphosphatidylinositol (GPI)-anchored proteins are abundant in the protozoan parasite Trypanosoma brucei, the causative agent of African sleeping sickness in humans and the related disease Nagana in cattle, and disruption of GPI biosynthesis is genetically and chemically validated as a drug target. Here, we examine the ability of enzymes of the trypanosomal GPI biosynthetic pathway to recognize and process a series of synthetic dimannosyl-glucosaminylphosphatidylinositol analogues containing systematic modifications on the mannose residues. The data reveal which portions of the natural substrate are important for recognition, explain why mannosylation occurs prior to inositol acylation in the trypanosomal pathway, and identify the first inhibitor of the third alpha-mannosyltransferase of the GPI biosynthetic pathway.
AB - Glycosylphosphatidylinositol (GPI)-anchored proteins are abundant in the protozoan parasite Trypanosoma brucei, the causative agent of African sleeping sickness in humans and the related disease Nagana in cattle, and disruption of GPI biosynthesis is genetically and chemically validated as a drug target. Here, we examine the ability of enzymes of the trypanosomal GPI biosynthetic pathway to recognize and process a series of synthetic dimannosyl-glucosaminylphosphatidylinositol analogues containing systematic modifications on the mannose residues. The data reveal which portions of the natural substrate are important for recognition, explain why mannosylation occurs prior to inositol acylation in the trypanosomal pathway, and identify the first inhibitor of the third alpha-mannosyltransferase of the GPI biosynthetic pathway.
KW - Animals
KW - Enzyme Inhibitors
KW - Glycosylphosphatidylinositols
KW - Humans
KW - Mannosyltransferases
KW - Trypanocidal Agents
KW - Trypanosoma brucei brucei
KW - Trypanosomiasis, African
U2 - 10.1021/cb800143w
DO - 10.1021/cb800143w
M3 - Journal article
C2 - 18928250
VL - 3
SP - 625
EP - 634
JO - ACS Chemical Biology
JF - ACS Chemical Biology
SN - 1554-8929
IS - 10
ER -