6LF5 | pdb_00006lf5

The solution structure of ShSPI

• PDB DOI: https://doi.org/10.2210/pdb6LF5/pdb

• Classification: TOXIN
• Organism(s): Scolopendra hainanum
• Mutation(s): No 


• Deposited: 2019-11-29 Released: 2020-12-02 
• Deposition Author(s): Luan, N., Rong, M.Q., Liu, J.X., Lai, R.
• Funding Organization(s): National Science Foundation (China)

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 200 
• Conformers Submitted: 16 
• Selection Criteria: structures with the lowest energy 

Literature

Identification and Characterization of ShSPI, a Kazal-Type Elastase Inhibitor from the Venom of Scolopendra Hainanum .

Luan, N., Zhao, Q., Duan, Z., Ji, M., Xing, M., Zhu, T., Mwangi, J., Rong, M., Liu, J., Lai, R.

(2019) Toxins (Basel) 11

• PubMed: 31817486 
• DOI: https://doi.org/10.3390/toxins11120708
• Primary Citation Related Structures: 
  6LF5


• PubMed Abstract: 
  

  Elastase is a globular glycoprotein and belongs to the chymotrypsin family. It is involved in several inflammatory cascades on the basis of cleaving the important connective tissue protein elastin, and is strictly regulated to a balance by several endogenous inhibitors. When elastase and its inhibitors are out of balance, severe diseases will develop, especially those involved in the cardiopulmonary system. Much attention has been attracted in seeking innovative elastase inhibitors and various advancements have been taken on clinical trials of these inhibitors. Natural functional peptides from venomous animals have been shown to have anti-protease properties. Here, we identified a kazal-type serine protease inhibitor named ShSPI from the cDNA library of the venom glands of Scolopendra hainanum . ShSPI showed significant inhibitory effects on porcine pancreatic elastase and human neutrophils elastase with Ki values of 225.83 ± 20 nM and 12.61 ± 2 nM, respectively. Together, our results suggest that ShSPI may be an excellent candidate to develop a drug for cardiopulmonary diseases.

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Organizational Affiliation: 
• Department of Zoology, College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China.
Key Laboratory of Animal Models and Human Disease Mechanisms of Chinese Academy of Sciences/Key Laboratory of Bioactive Peptides of Yunnan Province, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming 650223, China.
The National & Local Joint Engineering Laboratory of Animal Peptide Drug Development, College of Life Sciences, Hunan Normal University, Changsha 410081, China.
State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China.
Sino-African Joint Research Center, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming 650223, China.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: mass spectrometry

Macromolecule Content 

• Total Structure Weight: 3.96 kDa 
• Atom Count: 273 
• Modeled Residue Count: 34 
• Deposited Residue Count: 34 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
ShSPI	A	34	Scolopendra hainanum	Mutation(s): 0

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 200 
• Conformers Submitted: 16 
• Selection Criteria: structures with the lowest energy 

Structure Validation

Entry History 

& Funding Information

Deposition Data

• Released Date: 2020-12-02 
Deposition Author(s): Luan, N., Rong, M.Q., Liu, J.X., Lai, R.

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Funding Organization	Location	Grant Number
National Science Foundation (China)	China	21778059

Revision History  

• Version 1.0: 2020-12-02
  Type: Initial release
  
• Version 1.1: 2021-04-21
  Changes: Database references
• Version 1.2: 2023-06-14
  Changes: Database references, Other
• Version 1.3: 2024-10-23
  Changes: Data collection, Database references, Structure summary