Identification of potential novel interacting partners for coagulation factor xiii b (fxiii-b) subunit, a protein associated with a rare bleeding disorder

  • Coagulation factor XIII (FXIII) is a plasma-circulating heterotetrameric pro-transglutaminase complex that is composed of two catalytic FXIII-A and two protective/regulatory FXIII-B subunits. FXIII acts by forming covalent cross-links within a preformed fibrin clots to prevent its premature fibrinolysis. The FXIII-A subunit is known to have pleiotropic roles outside coagulation, but the FXIII-B subunit is a relatively unexplored entity, both structurally as well as functionally. Its discovered roles so far are limited to that of the carrier/regulatory protein of its partner FXIII-A subunit. In the present study, we have explored the co-presence of protein excipients in commercial FXIII plasma concentrate FibrogamminP by combination of protein purification and mass spectrometry-based verification. Complement factor H was one of the co-excipients observed in this analysis. This was followed by performing pull down assays from plasma in order to detect the putative novel interacting partners for the FXIII-B subunit. Complement system proteins, like complement C3 and complement C1q, were amongst the proteins that were pulled down. The only protein that was observed in both experimental set ups was alpha-2-macroglobulin, which might therefore be a putative interacting partner of the FXIII/FXIII-B subunit. Future functional investigations will be needed to understand the physiological significance of this association.

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Author:Sneha Singh, Mohammad Suhail Akhter, Johannes Dodt, Peter Volkers, Andreas Reuter, Christoph Reinhart, Christoph Krettler, Johannes OldenburgORCiDGND, Arijit BiswasORCiD
Pubmed Id:
Parent Title (English):International journal of molecular sciences
Publisher:Molecular Diversity Preservation International
Place of publication:Basel
Document Type:Article
Year of Completion:2019
Date of first Publication:2019/05/31
Publishing Institution:Universit├Ątsbibliothek Johann Christian Senckenberg
Release Date:2020/05/20
Tag:FXIII deficiency; Factor XIII; complement system; excipients; mass spectrometry; pleiotropy
Issue:11, Art. 2682
Page Number:12
First Page:1
Last Page:12
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited
Institutes:Biowissenschaften / Biowissenschaften
Angeschlossene und kooperierende Institutionen / MPI f├╝r Biophysik
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 57 Biowissenschaften; Biologie / 570 Biowissenschaften; Biologie
Licence (German):License LogoCreative Commons - Namensnennung 4.0