6OQP | pdb_00006oqp

U-AITx-Ate1

• PDB DOI: https://doi.org/10.2210/pdb6OQP/pdb
• BMRB: 30607

• Classification: ANTITUMOR PROTEIN
• Organism(s): Actinia tenebrosa
• Mutation(s): No 


• Deposited: 2019-04-28 Released: 2019-07-31 
• Deposition Author(s): Elnahriry, K.A., Wai, D.C.C., Norton, R.S.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 20 
• Selection Criteria: structures with the lowest energy 

Literature

Structural and functional characterisation of a novel peptide from the Australian sea anemone Actinia tenebrosa.

Elnahriry, K.A., Wai, D.C.C., Krishnarjuna, B., Badawy, N.N., Chittoor, B., MacRaild, C.A., Williams-Noonan, B.J., Surm, J.M., Chalmers, D.K., Zhang, A.H., Peigneur, S., Mobli, M., Tytgat, J., Prentis, P., Norton, R.S.

(2019) Toxicon 168: 104-112

• PubMed: 31302115 
• DOI: https://doi.org/10.1016/j.toxicon.2019.07.002
• Primary Citation Related Structures: 
  6OQP


• PubMed Abstract: 
  

  Sea anemone venoms have long been recognised as a rich source of peptides with interesting pharmacological and structural properties. Our recent transcriptomic studies of the Australian sea anemone Actinia tenebrosa have identified a novel 13-residue peptide, U-AITx-Ate1. U-AITx-Ate1 contains a single disulfide bridge and bears no significant homology to previously reported amino acid sequences of peptides from sea anemones or other species. We have produced U-AITx-Ate1 using solid-phase peptide synthesis, followed by oxidative folding and purification of the folded peptide using reversed-phase high-performance liquid chromatography. The solution structure of U-AITx-Ate1 was determined based on two-dimensional nuclear magnetic resonance spectroscopic data. Diffusion-ordered NMR spectroscopy revealed that U-AITx-Ate1 was monomeric in solution. Perturbations in the 1D ¹ H NMR spectrum of U-AITx-Ate1 in the presence of dodecylphosphocholine micelles together with molecular dynamics simulations indicated an interaction of U-AITx-Ate1 with lipid membranes, although no binding was detected to 100% POPC and 80% POPC: 20% POPG lipid nanodiscs by isothermal titration calorimetry. Functional assays were performed to explore the biological activity profile of U-AITx-Ate1. U-AITx-Ate1 showed no activity in voltage-clamp electrophysiology assays and no change in behaviour and mortality rates in crustacea. Moderate cytotoxic activity was observed against two breast cancer cell lines.

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Organizational Affiliation: 
• Medicinal Chemistry, Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, Parkville, VIC, 3052, Australia.
School of Biomedical Sciences, Faculty of Health, Queensland University of Technology, Brisbane, Australia; Institute of Health and Biomedical Innovation, Queensland University of Technology, Kelvin Grove, Australia.
Centre for Advanced Imaging, The University of Queensland, St. Lucia, 4072, Brisbane, Australia.
Toxicology and Pharmacology, University of Leuven, O&N 2, 3000, Leuven, Belgium.
School of Earth, Environmental and Biological Sciences, Science and Engineering Faculty, Queensland University of Technology, Brisbane, Australia; Institute for Future Environments, Queensland University of Technology, Brisbane, Australia.
Medicinal Chemistry, Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, Parkville, VIC, 3052, Australia; ARC Centre for Fragment-Based Design, Monash University, Parkville, VIC, 3052, Australia. Electronic address: [e-mail].

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content 

• Total Structure Weight: 1.48 kDa 
• Atom Count: 101 
• Modeled Residue Count: 13 
• Deposited Residue Count: 13 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
SER-LYS-TRP-ILE-CYS-ALA-ASN-ARG-SER-VAL-CYS-PRO-ILE	A	13	Actinia tenebrosa	Mutation(s): 0
UniProt
Find proteins for P0DQJ2 (Actinia tenebrosa) Explore P0DQJ2  Go to UniProtKB:  P0DQJ2

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 20 
• Selection Criteria: structures with the lowest energy 

Structure Validation

Entry History 

Deposition Data

• Released Date: 2019-07-31 
Deposition Author(s): Elnahriry, K.A., Wai, D.C.C., Norton, R.S.

Revision History  

• Version 1.0: 2019-07-31
  Type: Initial release
  
• Version 1.1: 2023-06-14
  Changes: Database references, Other
• Version 1.2: 2024-11-06
  Changes: Data collection, Database references, Structure summary