Macromolecule Content

• Total Structure Weight: 7.26 kDa 
• Atom Count: 506 
• Residue Count: 65 
• Unique protein chains: 1

1L3H

NMR structure of P41icf, a potent inhibitor of human cathepsin L

• DOI: 10.2210/pdb1L3H/pdb
• BMRB: 5583

• Classification: IMMUNE SYSTEM
• Mutation(s): No 


• Deposited: 2002-02-27 Released: 2003-03-04 
• Deposition Author(s): Chiva, C., Barthe, P., Codina, A., Giralt, E.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 600 
• Conformers Submitted: 30 
• Selection Criteria: structures with the lowest energy,target function 

Literature

Synthesis and NMR structure of P41ICF, a potent inhibitor of human cathepsin L

Chiva, C., Barthe, P., Codina, A., Gairi, M., Molina, F., Granier, C., Pugniere, M., Inui, T., Nishio, H., Nishiuchi, Y., Kimura, T., Sakakibara, S., Albericio, F., Giralt, E.

(2003) J Am Chem Soc 125: 1508-1517

• PubMed: 12568610 
• DOI: 10.1021/ja0207908
• Primary Citation of Related Structures:  
  1L3H


• PubMed Abstract: 
  

The total synthesis and structural characterization of the MHCII-associated p41 invariant chain fragment (P41icf) is described. P41icf plays a crucial role in the maturation of MHC class II molecules and antigen processing, acting as a highly selective cathepsin L inhibitor. P41icf synthesis was achieved using a combined solid-phase/solution approach. The entire molecule (65 residues, 7246 Da unprotected) was assembled in solution from fully protected peptides in the size range of 10 residues. After deprotection, oxidative folding in carefully adjusted experimental conditions led to the completely folded and functional P41icf with a disulfide pairing identical to that of native P41icf. CD, NMR, and surface plasmon resonance (SPR) were used for the structural and functional characterization of synthetic P41icf. CD thermal denaturation showed clear cooperative behavior. Tight cathepsin L binding was demonstrated by SPR. (1)H NMR spectroscopy at 800 MHz of unlabeled P41icf was used to solve the three-dimensional structure of the molecule. P41icf behaves as a well-folded protein domain with a topology very close to the crystallographic cathepsin L-bound form.

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Organizational Affiliation: 

Institut de Recerca Biomèdica de Barcelona, Parc Científic de Barcelona, Spain.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
MHC CLASS II-ASSOCIATED P41 INVARIANT CHAIN FRAGMENT (P41icf)	A	65	N/A	Mutation(s): 0
Find proteins for P04233 (Homo sapiens) Explore P04233  Go to UniProtKB:  P04233
NIH Common Fund Data Resources
PHAROS:  P04233 GTEx:  ENSG00000019582

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 600 
• Conformers Submitted: 30 
• Selection Criteria: structures with the lowest energy,target function 
• OLDERADO: 1L3H Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2002-02-27 
• Released Date: 2003-03-04 
Deposition Author(s): Chiva, C., Barthe, P., Codina, A., Giralt, E.

Revision History 

• Version 1.0: 2003-03-04
  Type: Initial release
  
• Version 1.1: 2008-04-28
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance