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Related Experiment Video

Updated: Jun 21, 2026

Investigating von Willebrand Factor Pathophysiology Using a Flow Chamber Model of von Willebrand Factor-platelet String Formation

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Published on: August 14, 2017

von Willebrand factor assembly and secretion.

¹Department of Medicine, Washington University School of Medicine, St Louis, MO 63110, USA. esadler@wustl.edu

Journal of Thrombosis and Haemostasis : JTH

|July 28, 2009

Summary

This summary is machine-generated.

Von Willebrand factor (VWF) undergoes pH-dependent conformational changes for proper multimer assembly and storage. These adaptations are crucial for VWF uncoiling and function in hemostasis upon secretion.

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Area of Science:

Biochemistry
Molecular Biology
Cell Biology

Background:

Von Willebrand factor (VWF) undergoes significant conformational changes throughout its lifecycle.
These changes are influenced by varying pH environments, including the endoplasmic reticulum (ER), Golgi apparatus, and extracellular space.

Purpose of the Study:

To investigate the biochemical and structural properties governing VWF self-organization.
To understand how VWF adapts to different pH conditions for proper multimerization, storage, and function.

Main Methods:

Analysis of VWF conformational changes in response to pH.
Investigation of VWF multimer assembly and storage mechanisms.
Biochemical and structural characterization of VWF domains.

Main Results:

VWF utilizes N-terminal domains as an oxidoreductase in the acidic Golgi environment to facilitate disulfide-linked multimer assembly.
VWF multimers condense into tubular arrays within Weibel-Palade bodies, a process dependent on low pH and Ca2+.
Extracellular secretion allows VWF to uncoil without tangling at neutral pH, essential for hemostasis.

Conclusions:

VWF exhibits remarkable self-organizing behaviors driven by pH-sensitive conformational changes.
These adaptations are critical for VWF's role in maintaining hemostasis.