Biological Assembly 1  

 3D View: Structure

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 14.73 kDa 
• Atom Count: 1031 
• Modelled Residue Count: 133 
• Deposited Residue Count: 133 
• Unique protein chains: 2

2M0V

Complex structure of C-terminal CFTR peptide and extended PDZ2 domain from NHERF1

• DOI: 10.2210/pdb2M0V/pdb
• BMRB: 18826

• Classification: PROTEIN BINDING/PROTEIN BINDING
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2012-11-06 Released: 2013-04-24 
• Deposition Author(s): Bhattacharya, S., Ju, J.H., Cowburn, D., Bu, Z.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 1000 
• Conformers Submitted: 20 
• Selection Criteria: structures with the lowest energy 

Literature

Ligand-Induced Dynamic Changes in Extended PDZ Domains from NHERF1.

Bhattacharya, S., Ju, J.H., Orlova, N., Khajeh, J.A., Cowburn, D., Bu, Z.

(2013) J Mol Biol 425: 2509-2528

• PubMed: 23583913 
• DOI: 10.1016/j.jmb.2013.04.001
• Primary Citation of Related Structures:  
  2M0T, 2M0V, 2M0U


• PubMed Abstract: 
  

The multi-domain scaffolding protein NHERF1 modulates the assembly and intracellular trafficking of various transmembrane receptors and ion-transport proteins. The two PDZ (postsynaptic density 95/disk large/zonula occluden 1) domains of NHERF1 possess very different ligand-binding capabilities: PDZ1 recognizes a variety of membrane proteins with high affinity, while PDZ2 only binds limited number of target proteins. Here using NMR, we have determined the structural and dynamic mechanisms that differentiate the binding affinities of the two PDZ domains, for the type 1 PDZ-binding motif (QDTRL) in the carboxyl terminus of cystic fibrosis transmembrane regulator. Similar to PDZ2, we have identified a helix-loop-helix subdomain coupled to the canonical PDZ1 domain. The extended PDZ1 domain is highly flexible with correlated backbone motions on fast and slow timescales, while the extended PDZ2 domain is relatively rigid. The malleability of the extended PDZ1 structure facilitates the transmission of conformational changes at the ligand-binding site to the remote helix-loop-helix extension. By contrast, ligand binding has only modest effects on the conformation and dynamics of the extended PDZ2 domain. The study shows that ligand-induced structural and dynamic changes coupled with sequence variation at the putative PDZ binding site dictate ligand selectivity and binding affinity of the two PDZ domains of NHERF1.

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Organizational Affiliation: 

New York Structural Biology Center, 89 Convent Avenue, New York, NY 10027, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Na(+)/H(+) exchange regulatory cofactor NHE-RF1	A	128	Homo sapiens	Mutation(s): 0  Gene Names: SLC9A3R1, NHERF, NHERF1
UniProt & NIH Common Fund Data Resources
Find proteins for O14745 (Homo sapiens) Explore O14745  Go to UniProtKB:  O14745
PHAROS:  O14745 GTEx:  ENSG00000109062

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
C-terminal CFTR peptide	B	5	N/A	Mutation(s): 0

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 1000 
• Conformers Submitted: 20 
• Selection Criteria: structures with the lowest energy 
• OLDERADO: 2M0V Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2012-11-06 
• Released Date: 2013-04-24 
Deposition Author(s): Bhattacharya, S., Ju, J.H., Cowburn, D., Bu, Z.

Revision History  

• Version 1.0: 2013-04-24
  Type: Initial release
  
• Version 1.1: 2013-05-01
  Changes: Database references
• Version 1.2: 2013-06-26
  Changes: Database references
• Version 1.3: 2013-07-17
  Changes: Database references