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STX8 Membrane Protein Introduction

Introduction of STX8

STX8 is a protein that in humans is encoded by the STX8 gene. It is expressed in mouse and human platelets and localizes to the membrane fraction of platelets. STX8 is a 27-kDa protein that appears to be necessary for the transport from early to late endosomes. STX8 contains in its C-terminal half a coiled-coil domain found highly conserved in the tSNARE (soluble NSF attachment proteins receptor) superfamily of proteins.

Basic Information of STX8
Protein Name Syntaxin-8
Gene Name STX8
Aliases CARB
Organism Homo sapiens (Human)
UniProt ID O15400
Transmembrane Times 1
Length (aa) 236
Sequence MAPDPWFSTYDSTCQIAQEIAEKIQQRNQYERKGEKAPKLTVTIRALLQNLKEKIALLKDLLLRAVSTHQITQLEGDRRQNLLDDLVTRERLLLASFKNEGAEPDLIRSSLMSEEAKRGAPNPWLFEEPEETRGLGFDEIRQQQQKIIQEQDAGLDALSSIISRQKQMGQEIGNELDEQNEIIDDLANLVENTDEKLRNETRRVNMVDRKSASCGMIMVILLLLVAIVVVAVWPTN

Function of STX8 Membrane Protein

Among the SNARE family, syntaxins (STXs) belong to a subfamily of target-SNAREs stationed at the target membrane. The SNARE domain of STXs consists of a highly conserved coiled-coil domain and mediates the trafficking and targeting of intracellular vesicles. STXs also interact with a wide range of plasma membrane proteins and regulate their intracellular trafficking, including sodium channel, voltage-gated potassium channel, and cystic fibrosis transmembrane conductance regulator. STX8 is a member of the Q-SNARE family which mediates membrane fusion through interactions with their cognate R-SNARE partners to form organelle-specific docking and fusion complexes in eukaryotic cells. A recent study suggested that STX8 regulated cystic fibrosis transmembrane conductance regulator channels trafficking and its chloride transport activity. STX8 siRNA decreased the cell surface localization of CLDN16 and permeability to Mg2+ in Madin-Darby canine kidney (MDCK) cells expressing FLAG-tagged CLDN16. Furthermore, STX8 siRNA decreased the recycling of CLDN16 to the plasma membrane without affecting endocytosis.

Structure of STX8 Fig.1 Structure of STX8.

Application of STX8 Membrane Protein in Literature

  1. Bhat S.S., et al. Syntaxin 8 is required for efficient lytic granule trafficking in cytotoxic T lymphocytes. Biochim Biophys Acta. 2016, 1863(7 Pt A): 1863-1854. PubMed ID: 27094127

    Results of this investigation concluded Stx8 participated in proper and timely sorting and trafficking of cytotoxic molecules to functional lytic granules through the endosomal pathway in human cytotoxic T lymphocytes.

  2. Lancha A., et alExpression of syntaxin 8 in visceral adipose tissue is increased in obese patients with type 2 diabetes and related to markers of insulin resistance and inflammation. Arch Med Res. 2015, 46(1): 47-53. PubMed ID: 25523146

    This research reported that increased STX8 levels in visceral adipose tissue might be associated with the occurrence of T2D in obese patients.

  3. Golebiewska E.M., et al. Syntaxin 8 regulates platelet dense granule secretion, aggregation, and thrombus stability. Am J Clin Pathol. 2015, 290(3): 604-616. PubMed ID: 25404741

    Authors found that STX8 regulated granule release from platelets, therefore mediating platelet function in thrombosis and hemostasis.

  4. Chen B., et al. Syntaxin 8 modulates the post-synthetic trafficking of the TrkA receptor and inflammatory pain transmission. J Biol Chem. 2014, 289(28): 19556-19569. PubMed ID: 24872407

    This investigation found that STX8 facilitated the TrkA transport from the Golgi to the plasma membrane and mediated the surface levels of TrkA.

  5. Ikari A., et alTight junctional localization of claudin-16 is regulated by syntaxin 8 in renal tubular epithelial cells. J Biol Chem. 2014, 289(19): 13112-13123. PubMed ID: 24659781

    Results of this study revealed that lacking STX8 function reduced the trafficking of CLDN16, suggesting STX8 plays an essential role in CLDN16 trafficking machinery in the kidney.

STX8 Preparation Options

To obtain the soluble and functional target protein, the versatile Magic™ membrane protein production platform at Creative Biolabs enables many flexible options, from which you can always find a better match for your particular project. Aided by our versatile Magic™ anti-membrane protein antibody discovery platform, we also provide customized anti-STX8 antibody development services.


Creative Biolabs' skillful scientists are glad to leverage our expertise and advanced technologies to help you with the memebrane protein research. If you are interested, please feel free to contact us for more details.


All listed services and products are For Research Use Only. Do Not use in any diagnostic or therapeutic applications.

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