Recombinant Hemangiopoietin promotes cell adhesion and binds heparin in its multimeric form

0Citations
Citations of this article
6Readers
Mendeley users who have this article in their library.

Abstract

Hemangiopoietin (HAPO) is a novel growth factor stimulating the proliferation of hematopoietic and endothelial progenitor cells in vitro and in vivo. The native protein is a 294-amino acid multimodular protein. The N-terminus constitutes of two somatomedin B (SMB) homology domains that contain 14 cysteines. The central region is a putative heparin-binding domain (pHBD) and the C-terminus contains mucin-like repeats. In the present study, we demonstrated that prokaryotic recombinant human HAPO (rhHAPO) self-associates into a multimeric form with a mass weight of ∼129 kDa, suggesting a homologous tetramer. rhHAPO in its multimeric form was found to be more stable and more potent in promoting HESS-5 cell adhesion. Multimeric rhHAPO had a higher affinity to heparin compared with its dimeric form, although there was no significant conformational change. C-terminal repeats-truncated rhHAPO (rhHAPOΔmucin) was also found to be assembled into a multimer, while deletion of pHBD (rhHAPOΔmucin-pHBD) caused the protein to remain in a dimeric form, demonstrating that SMB domains participate in self-aggregation of the molecule and that the pHBD region promotes the tetramerization.

Cite

CITATION STYLE

APA

Wang, L. F., Han, Z. B., Li, M., Yang, P., Xv, B., Zhang, J. P., & Han, Z. C. (2013). Recombinant Hemangiopoietin promotes cell adhesion and binds heparin in its multimeric form. Molecular Medicine Reports, 7(3), 959–964. https://doi.org/10.3892/mmr.2013.1274

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free