Complex Peptide Services

Complex Peptide Expertise

SynSmart has experience across a wide range of challenging peptide designs, from structurally constrained architectures to advanced conjugated and labelled modalities.

Structural complexity

Constrained Architectures

  • Disulfide-rich peptides with single and double disulfide architectures
  • Cysteine-rich peptides and peptide toxins
  • Stapled and conformationally constrained peptides
  • Branched peptides

Macrocycle chemistry

Cyclisation Strategies

  • Cyclic peptides generated through thioether formation, click chemistry, stapling, and ring-closing metathesis (RCM)
  • Cyclic thioethers, including synthetically challenging architectures
  • Head-to-tail cyclized peptides and lactam-containing peptides

Sequence range

Linear Peptides

  • Long linear peptides (>20 amino acids)
  • Medium-length peptides (10–20 amino acids)

Functionalisation

Conjugated and Labelled Peptides

  • Lipidated and PEG-modified peptides
  • Stable-isotope and labelled peptides
  • Derivatised peptides

Advanced modalities

Peptide-Inspired Constructs

  • Peptoids and peptidomimetics

Synthetic components

Specialised Building Blocks

  • Modified amino acids, building blocks, linkers, and dipeptides

End-to-End Delivery

From modification and purification to scalable synthesis

Modification and Purification Capabilities

Functionalised products supported by advanced analytics

Beyond SPPS, SynSmart can perform solution-phase modifications at both the C- and N-terminals, enabling the preparation of highly functionalized final peptide products. Our analytical and purification infrastructure supports purification, characterisation, and quality assessment of complex peptide products.

Preparative HPLC Automated Prep HPLC UPLC-MS LC-MS SFC HPLC with PDA/ELSD GC NMR

Scale-Up Capability

Challenging chemistry translated to gram scale

SynSmart has demonstrated the ability to translate challenging peptide chemistry beyond small-scale synthesis. In one representative case, a cyclic thioether containing a stereochemically challenging side-chain-derived linkage was successfully optimised and synthesised at gram scale using a scalable routine chemistry approach.