Christofer Lendel

Latest news

New insights about the structure of spider silk fibers

In collaboration with My Hedhammar's group we have explored the structurucral properties of spider silk. Spider silk proteins, spidroins, are complex macromolecules consisting of a repetitive region flanked by non-repetitive N- and C-terminal domains (NT and CT). While the repetitive region is fundamental for the mechanical properties of the final fiber, the terminal domains are believed to control the assembly process, as a response on changes in the environment when the spidroins are pushed through the spinning duct. We exploit the ability of the CT domain to form silk-like fibers on its own, to gain new insights about its functional role. Using an integrative structural biology approach, we show for the first time that the CT domain, unlike the NT domain, undergoes an alpha-to-beta structural transition upon fiber formation. The results highlight a segment that is part of helix 4 in the soluble structure of CT as a potential driver for this process. The paper was just published in Nature Communications.

Research Interests

The assembly of protein molecules into nanoscale aggregates and amyloid fibrils are key events in many biochemical processes ranging from neurodegenerative disorders, such as Alzheimer’s disease, to the design of novel nanomaterials. In my research I investigate the structural properties and interactions of such protein aggregates. In particular, I am interested in the molecular mechanisms for how protein nanostructures interact with other (bio)molecules.

 

New materials from protein nanofibrils

Protein nanofibrils display extraordinary mechanical and functional properties and has the potential to be used as building blocks for new materials with hieracrical structures. We develop methods to produce fibrils from protein-rich and renewable sources (e.g. plant proteins) and the technology to produce new protein-based materials.

 

Pathological mechanisms of protein aggregates

Protein self-assembly and deposition are hallmarks of many serious diseases but the disease-causing mechanisms remain enigmatic.  However, any pathological mechanism must involve interactions between the protein aggregates and other biomolecules. We explore and characterize such interactions in order to better understand what makes a protein nanostructure toxic.

Inhibitors of protein aggregation

The mechanisms of action for small molecule inhibitors of protein aggregation remain poorly understood and the development of new therapeutics against amyloid diseases is slow. Interfering with protein self-assembly is complicated and essentially different from traditional drug design. By studying the binding mechanisms of small molecules to aggregation-prone proteins we believe that we will better understand what type of molecules could be explored as drug candidates for amyloid-diseases.

Group members

Rahul Sharma (Post Doc) 

Selected publications

Structural conversion of the spidroin C-terminal domain during assembly of spider silk fibers. De Oliveira et al. Nat. Commun. (2024)

Protein nanofibrils and their use as building blocks of sustainable materials (review). Lendel & Solin RSC Adv.(2021).

Extracellular protein components of amyloid plaques and their roles in Alzheimer’s disease pathology (review). Rahman & Lendel Mol. Neurodegen. (2021).

High-temperature and chemically resistant foams from sustainable nanostructured protein. Ye et al. Adv. Sustainable Syst. (2021).

Dissecting the structural organization of multiprotein amyloid aggregates using a bottom-up approach. Chaudharyet al. ACS Chem. Neurosci. (2020).

Flow-assisted assembly of nanostructured protein microfibers. Kamadaet al.Proc. Natl. Acad. Sci. USA (2017).

Binding of human proteins to amyloid-β protofibrils. Rahmanet al. ACS Chem. Biol. (2015).

A hexameric peptide barrel as building block of amyloid-β protofibrils. Lendelet al. Angew. Chem. Int. Ed (2014).

Inhibition of amyloid formation (review). Härd & Lendel J. Mol. Biol. (2012).