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The Role of Drosophila Heparan Sulfate 6-O-Endosulfatase in Sulfation Compensation.

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Bibliographic Details
Title:	The Role of Drosophila Heparan Sulfate 6-O-Endosulfatase in Sulfation Compensation.
Authors:	Dejima, Katsufumi¹, Kleinschmit, Adam¹, Takemura, Masahiko¹, Pui Yee Choi¹, Kinoshita-Toyoda, Akiko², Toyoda, Hidenao², Nakato, Hiroshi¹ nakat003@umn.edu
Source:	Journal of Biological Chemistry. 3/1/2013, Vol. 288 Issue 9, p6574-6582. 9p.
Subjects:	Drosophila, Heparan sulfate proteoglycans, Biosynthesis, Sulfation, Proteoglycans, Decapentaplegic protein, Hedgehog signaling proteins
Abstract:	The biosynthesis of heparan sulfate proteoglycans is tightly regulated by multiple feedback mechanisms, which support robust developmental systems. One of the regulatory network systems controlling heparan sulfate (HS) biosynthesis is sulfation compensation. A previous study using Drosophila HS 2-O- and 6-O-sulfotransferase (Hs2st and Hs6st) mutants showed that loss of sulfation at one position is compensated by increased sulfation at other positions, supporting normal FGF signaling. Here, we show that HS sulfation compensation rescues both Decapentaplegic and Wingless signaling, suggesting a universal role of this regulatory system in multiple pathways in Drosophila. Furthermore, we identified Sulf1, extracellularHS6-O-endosulfatase, as a novel component of HS sulfation compensation. Simultaneous loss of Hs2st and Sulf1 led to 6-O-oversulfation, leading to patterning defects, overgrowth, and lethality. These phenotypes are caused at least partly by abnormal up-regulation of Hedgehog signaling. Thus, sulfation compensation depends on the coordinated activities of Hs2st, Hs6st, and Sulf1. [ABSTRACT FROM AUTHOR]
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Database:	Engineering Source

Description
Abstract:	The biosynthesis of heparan sulfate proteoglycans is tightly regulated by multiple feedback mechanisms, which support robust developmental systems. One of the regulatory network systems controlling heparan sulfate (HS) biosynthesis is sulfation compensation. A previous study using Drosophila HS 2-O- and 6-O-sulfotransferase (Hs2st and Hs6st) mutants showed that loss of sulfation at one position is compensated by increased sulfation at other positions, supporting normal FGF signaling. Here, we show that HS sulfation compensation rescues both Decapentaplegic and Wingless signaling, suggesting a universal role of this regulatory system in multiple pathways in Drosophila. Furthermore, we identified Sulf1, extracellularHS6-O-endosulfatase, as a novel component of HS sulfation compensation. Simultaneous loss of Hs2st and Sulf1 led to 6-O-oversulfation, leading to patterning defects, overgrowth, and lethality. These phenotypes are caused at least partly by abnormal up-regulation of Hedgehog signaling. Thus, sulfation compensation depends on the coordinated activities of Hs2st, Hs6st, and Sulf1. [ABSTRACT FROM AUTHOR]
ISSN:	00219258
DOI:	10.1074/jbc.M112.404830