ACE-031, also known as Ramatercept, is a fusion protein studied in the context of muscle biology research. This overview covers its structure, supply form, and research context.
What is ACE-031?
ACE-031, known commercially in research as Ramatercept, is a recombinant fusion protein combining the extracellular domain of the activin receptor type IIB (ActRIIB) with the Fc portion of human immunoglobulin G1 (IgG1). It is not a traditional synthesised peptide in the same way as BPC-157 or TB-500; rather, it is a larger biological molecule engineered to act as a ligand trap, binding to activin and other members of the TGF-β superfamily.
Research context
ACE-031 has been studied primarily in the context of muscle biology. The ActRIIB receptor is involved in signalling pathways that regulate muscle protein synthesis and catabolism. By occupying the receptor with a decoy form, ACE-031 is theorised to alter the balance of these pathways in cell culture and animal model research.
Studies investigating ACE-031 have appeared in the literature concerning muscular dystrophy models and general muscle biology research. It is important to note that ACE-031's development for human therapeutic use was discontinued following safety findings in clinical trials — a fact that should be clearly understood by any researcher considering its use in their experimental models.
Supply form and handling
Unlike small peptides, ACE-031 as a recombinant fusion protein is significantly larger and more structurally complex. Storage and handling requirements are more stringent:
- Store lyophilised material at −80°C for long-term preservation
- Reconstitute in sterile PBS or as specified by the certificate of analysis
- Handle with particular care to avoid aggregation (gentle mixing only — never vortex)
- Aliquot immediately after reconstitution; avoid multiple freeze-thaw cycles
Research use context
ACE-031 is exclusively a research compound for in vitro or ex vivo laboratory use. Given its size and structural complexity, cell-based assays and ligand-binding studies are the primary research applications. Any use must comply with your institution's ethical guidelines and applicable regulations for biological research materials.
Important: ACE-031 is a research-only compound. Human clinical development was discontinued due to adverse findings. This material is not for human or veterinary use under any circumstances.