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High throughput measurements of bone morphogenetic protein (BMP)/BMP receptors interactions using bio-layer interferometry

High throughput measurements of bone morphogenetic protein (BMP)/BMP receptors interactions using bio-layer interferometry

Authors :
Khodr, Valia
Machillot, Paul
Migliorini, Elisa
Reiser, Jean-Baptiste
Picart, Catherine
Source :
Biointerphases
Publication Year :
2021

Abstract

Bone morphogenetic proteins (BMP) are an important family of growth factors playing a role in a large number of physiological and pathological processes, including bone homeostasis, tissue regeneration and cancers. In vivo, BMPs bind successively to both BMP receptors (BMPR) of type I and type II, and a promiscuity has been reported. In this study, we used bio-layer interferometry to perform parallel real-time biosensing and to deduce the kinetic parameters (k(a), k(d)) and the equilibrium constant (K(D)) for a large range of BMPs/BMPR combinations in similar experimental conditions. We selected four members of the BMP family (BMP-2, 4, 7, 9) known for their physiological relevance and studied their interactions with five type-I BMP receptors (ALK1, 2, 3, 5, 6) and three type-II BMP receptors (BMPR-II, ACTR-IIA, ACTR-IIB). We reveal that BMP-2 and BMP-4 behave differently, especially regarding their kinetic interactions and affinities with the type-II BMPR. We found that BMP-7 has a higher affinity for the type-II BMPR receptor ACTR-IIA and a tenfold lower affinity with the type-I receptors. While BMP-9 has a high and similar affinity for all type-II receptors, it can interact with ALK5 and ALK2, in addition to ALK1. Interestingly, we also found that all BMPs can interact with ALK5. The interaction between BMPs and both type-I and type II receptors in a ternary complex did not reveal further cooperativity. Our work provides a synthetic view of the interactions of these BMPs with their receptors and paves the way for future studies on their cell-type and receptor specific signaling pathways.

Details

Language :
English
Database :
OpenAIRE
Journal :
Biointerphases
Accession number :
edsair.pmid..........5a86fb503a59b0975683df948a4a2a94