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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Trans-Golgi network syntaxin 10 functions distinctly from syntaxins 6 and 16.

Syntaxin 10 is a soluble N-ethylmaleimide sensitive factor attachment protein receptor (SNARE) protein localized to the trans-Golgi network (TGN), where two other members of the syntaxin family, syntaxins 6 and 16, also reside. The role of syntaxin 10 in regulating TGN protein traffic is not yet defined. Syntaxin 10 co-localizes well with syntaxins 6 and 16 at the TGN in interphase cells, and appears to interact with both syntaxin 6 and 16 as evidenced by co-immunoprecipitation analyses. However, unlike syntaxin 6 and 16, neither syntaxin 10 antibodies nor its cytosolic domain inhibits endosome-TGN transport of shiga toxin. Syntaxin 16 knockdown with small interfering RNA (siRNA) affects the TGN localization of syntaxin 6 but not syntaxin 10, and clearly inhibits endosome-TGN transport. On the other hand, knockdown of syntaxin 10 expressions had no significant effect on the TGN localization of syntaxin 6 and 16, and did not inhibit endosome-TGN transport. Unlike syntaxin 16, syntaxin 10 does not interact specifically with Vps45, the Sec1/Munc18 (SM) family member at the TGN. On the other hand, syntaxin 10 reciprocally co-immunoprecipitated endosomal syntaxin 12/13, and knockdown of syntaxin 10 expressions affects the surface expression of transferrin receptor ( TfR) and seems to induce the formation of an immobile TfR pool. Therefore, in spite of its co-localization and possible interaction with syntaxin 16, syntaxin 10 is not part of the syntaxin 16-based SNARE complex involved in endosome-TGN transport, and may have a hitherto unrecognized function in the TGN-endosome boundary.[1]


  1. Trans-Golgi network syntaxin 10 functions distinctly from syntaxins 6 and 16. Wang, Y., Tai, G., Lu, L., Johannes, L., Hong, W., Luen Tang, B. Mol. Membr. Biol. (2005) [Pubmed]
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