Nat Struct Mol Biol. 2004 Aug;11(8):721-9. Epub 2004 Jul 18.

Identification, function and structure of the mycobacterial sulfotransferase that initiates sulfolipid-1 biosynthesis.

Mougous JD, Petzold CJ, Senaratne RH, Lee DH, Akey DL, Lin FL, Munchel SE, Pratt MR, Riley LW, Leary JA, Berger JM, Bertozzi CR.

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Department of Molecular and Cell Biology, University of California, Berkeley, California 94720, USA.

Abstract

Sulfolipid-1 (SL-1) is an abundant sulfated glycolipid and potential virulence factor found in Mycobacterium tuberculosis. SL-1 consists of a trehalose-2-sulfate (T2S) disaccharide elaborated with four lipids. We identified and characterized a conserved mycobacterial sulfotransferase, Stf0, which generates the T2S moiety of SL-1. Biochemical studies demonstrated that the enzyme requires unmodified trehalose as substrate and is sensitive to small structural perturbations of the disaccharide. Disruption of stf0 in Mycobacterium smegmatis and M. tuberculosis resulted in the loss of T2S and SL-1 formation, respectively. The structure of Stf0 at a resolution of 2.6 A reveals the molecular basis of trehalose recognition and a unique dimer configuration that encloses the substrate into a bipartite active site. These data provide strong evidence that Stf0 carries out the first committed step in the biosynthesis of SL-1 and establish a system for probing the role of SL-1 in M. tuberculosis infection.

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Nat Struct Mol Biol. 2004 Aug;11(8):686-7.

PMID:: 15258569; [PubMed - indexed for MEDLINE]

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Structures reported by this article

Mycobacterium Smegmatis Stf0 Sulfotransferase With Trehalose

PDB: 1TEX

Source: Mycobacterium smegmatis

Method: X-Ray Diffraction

Resolution: 2.6 Å

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