Related Experiment Video
Updated: Mar 12, 2026

Combining X-Ray Crystallography with Small Angle X-Ray Scattering to Model Unstructured Regions of Nsa1 from S. Cerevisiae
Published on: January 10, 2018
Crystal structure of Arabidopsis thaliana SNC1 TIR domain
Kyung-Gi Hyun1, Yeon Lee2, Jungmin Yoon1
1Department of Biological Sciences, KI for the BioCentury, KAIST, 291 Daehakro, Daejeon, 34141, Republic of Korea.
Abstract:
Plant immune response is initiated by Resistance proteins (R proteins). Toll/interleukin-1 receptor (TIR) domain in R proteins, which is responsible for the dimerization but has limited conservation in their primary structures. Suppressor of npr1-1, constitutive 1 (SNC1), a TIR-containing R protein, is involved in autoimmunity of plant, but the binding partner of SNC1 via the TIR domain and its specific cognate effector protein remain elusive. Here, we present the crystal structure of the TIR domain of Arabidopsis thaliana SNC1 (AtSNC1-TIR). The structure shows that AtSNC1-TIR domain is similar to those of other plant TIR domains including AtTIR, L6 and RPS4. Structural and sequence analysis on AtSNC1-TIR revealed that almost all conserved amino acids are located in the core of the structure, while the amino acids on the surface are highly variable, implicating that each TIR domain utilizes the variable surface for interacting its binding partner. In addition, the interaction between AtSNC1-TIR proteins in the crystal suggests two possible dimerization modes of AtSNC1-TIR domain. This study provides structural platform to investigate AtSNC1-TIR mediated signaling pathway of plant immune responses.
More Related Videos
11:31Crystal Structure of the N-terminal Domain of Ryanodine Receptor from Plutella xylostella
Published on: November 30, 2018
07:54Analysis of AtHIRD11 Intrinsic Disorder and Binding Towards Metal Ions by Capillary Gel Electrophoresis and Affinity Capillary Electrophoresis
Published on: August 22, 2018
Related Concept Videos
ATP Synthase: Structure
Nucleic Acid Structure
DNA Structure
DNA...
Protein Complex Assembly
Many viruses self-assemble into a fully functional unit using the infected host cell to...
Cell Signaling in Plants
Tail-anchoring of Proteins in the ER Membrane
tRNA Activation