Biological Assembly 1  

 3D View: Structure | Electron Density

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B1 

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

Macromolecule Content

• Total Structure Weight: 24.62 kDa 
• Atom Count: 1492 
• Residue Count: 176 
• Unique protein chains: 2

3AQF

Crystal structure of the human CRLR/RAMP2 extracellular complex

• DOI: 10.2210/pdb3AQF/pdb

• Classification: TRANSPORT PROTEIN/MEMBRANE PROTEIN
• Organism(s): Homo sapiens
• Mutation(s): No 


• Deposited: 2010-10-29 Released: 2011-11-02 
• Deposition Author(s): Kusano, S., Kukimono-Niino, M., Shirouzu, M., Shindo, T., Yokoyama, S.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.60 Å
• R-Value Free: 0.282 
• R-Value Work: 0.222 

Literature

Structural basis for extracellular interactions between calcitonin receptor-like receptor and receptor activity-modifying protein 2 for adrenomedullin-specific binding

Kusano, S., Kukimoto-Niino, M., Hino, N., Ohsawa, N., Okuda, K., Sakamoto, K., Shirouzu, M., Shindo, T., Yokoyama, S.

(2012) Protein Sci 21: 199-210

• PubMed: 22102369 
• DOI: 10.1002/pro.2003
• Primary Citation of Related Structures:  
  3AQE, 3AQF


• PubMed Abstract: 
  

The calcitonin receptor-like receptor (CRLR), a class B GPCR, forms a heterodimer with receptor activity-modifying protein 2 (RAMP2), and serves as the adrenomedullin (AM) receptor to control neovascularization, while CRLR and RAMP1 form the calcitonin gene-related peptide (CGRP) receptor. Here, we report the crystal structures of the RAMP2 extracellular domain alone and in the complex with the CRLR extracellular domain. The CRLR-RAMP2 complex exhibits several intermolecular interactions that were not observed in the previously reported CRLR-RAMP1 complex, and thus the shape of the putative ligand-binding pocket of CRLR-RAMP2 is distinct from that of CRLR-RAMP1. The CRLR-RAMP2 interactions were confirmed for the full-length proteins on the cell surface by site-specific photo-crosslinking. Mutagenesis revealed that AM binding requires RAMP2 residues that are not conserved in RAMP1. Therefore, the differences in both the shapes and the key residues of the binding pocket are essential for the ligand specificity.

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Organizational Affiliation: 

RIKEN Systems and Structural Biology Center, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, Japan.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Receptor activity-modifying protein 2	A	91	Homo sapiens	Mutation(s): 0  Gene Names: RAMP2
Find proteins for O60895 (Homo sapiens) Explore O60895  Go to UniProtKB:  O60895
NIH Common Fund Data Resources
PHAROS:  O60895 GTEx:  ENSG00000131477

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Calcitonin gene-related peptide type 1 receptor	B	121	Homo sapiens	Mutation(s): 0  Gene Names: CALCRL, CGRPR
Find proteins for Q16602 (Homo sapiens) Explore Q16602  Go to UniProtKB:  Q16602
NIH Common Fund Data Resources
PHAROS:  Q16602 GTEx:  ENSG00000064989

Small Molecules

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
MSE	A	L-PEPTIDE LINKING	C5 H11 N O2 Se		MET

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.60 Å
• R-Value Free: 0.282 
• R-Value Work: 0.222 
• Space Group: P 4₁ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 55.424	α = 90
b = 55.424	β = 90
c = 119.391	γ = 90

Software Package:

Software Name	Purpose
HKL-2000	data collection
SOLVE	phasing
CNS	refinement
DENZO	data reduction
SCALEPACK	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2010-10-29 
• Released Date: 2011-11-02 
Deposition Author(s): Kusano, S., Kukimono-Niino, M., Shirouzu, M., Shindo, T., Yokoyama, S.

Revision History 

• Version 1.0: 2011-11-02
  Type: Initial release
  
• Version 1.1: 2012-07-25
  Changes: Database references