Macromolecule Content

• Total Structure Weight: 7.31 kDa 
• Atom Count: 509 
• Modelled Residue Count: 68 
• Deposited Residue Count: 68 
• Unique protein chains: 1

1PPQ

NMR structure of 16th module of Immune Adherence Receptor, Cr1 (Cd35)

• DOI: 10.2210/pdb1PPQ/pdb
• BMRB: 5900

• Classification: IMMUNE SYSTEM
• Organism(s): Homo sapiens
• Expression System: Komagataella pastoris
• Mutation(s): Yes 


• Deposited: 2003-06-17 Released: 2004-05-04 
• Deposition Author(s): O'Leary, J.M., Bromek, K., Black, G.M., Uhrinova, S., Schmitz, C., Krych, M., Atkinson, J.P., Uhrin, D., Barlow, P.N.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 60 
• Conformers Submitted: 20 
• Selection Criteria: structures with the lowest energy 

Literature

Backbone dynamics of complement control protein (CCP) modules reveals mobility in binding surfaces.

O'Leary, J.M., Bromek, K., Black, G.M., Uhrinova, S., Schmitz, C., Wang, X., Krych, M., Atkinson, J.P., Uhrin, D., Barlow, P.N.

(2004) Protein Sci 13: 1238-1250

• PubMed: 15096630 
• DOI: 10.1110/ps.03582704
• Primary Citation of Related Structures:  
  1PPQ


• PubMed Abstract: 
  

The regulators of complement activation (RCA) are critical to health and disease because their role is to ensure that a complement-mediated immune response to infection is proportionate and targeted. Each protein contains an uninterrupted array of from four to 30 examples of the very widely occurring complement control protein (CCP, or sushi) module. The CCP modules mediate specific protein-protein and protein-carbohydrate interactions that are key to the biological function of the RCA and, paradoxically, provide binding sites for numerous pathogens. Although structural and mutagenesis studies of CCP modules have addressed some aspects of molecular recognition, there have been no studies of the role of molecular dynamics in the interaction of CCP modules with their binding partners. NMR has now been used in the first full characterization of the backbone dynamics of CCP modules. The dynamics of two individual modules-the 16th of the 30 modules of complement receptor type 1 (CD35), and the N-terminal module of membrane cofactor protein (CD46)-as well as their solution structures, are compared. Although both examples share broadly similar three-dimensional structures, many structurally equivalent residues exhibit different amplitudes and timescales of local backbone motion. In each case, however, regions of the module-surface implicated by mutagenesis as sites of interactions with other proteins include several mobile residues. This observation suggests further experiments to explore binding mechanisms and identify new binding sites.

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Organizational Affiliation: 

Schools of Chemistry and Biology, University of Edinburgh, Edinburgh EH9 3JJ, Scotland.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Complement receptor type 1	A	68	Homo sapiens	Mutation(s): 1  Gene Names: CR1 OR C3BR, CR1, C3BR
Find proteins for P17927 (Homo sapiens) Explore P17927  Go to UniProtKB:  P17927
NIH Common Fund Data Resources
PHAROS:  P17927 GTEx:  ENSG00000203710

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 60 
• Conformers Submitted: 20 
• Selection Criteria: structures with the lowest energy 
• OLDERADO: 1PPQ Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2003-06-17 
• Released Date: 2004-05-04 
Deposition Author(s): O'Leary, J.M., Bromek, K., Black, G.M., Uhrinova, S., Schmitz, C., Krych, M., Atkinson, J.P., Uhrin, D., Barlow, P.N.

Revision History  

• Version 1.0: 2004-05-04
  Type: Initial release
  
• Version 1.1: 2008-04-29
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance