Biological Assembly 1  

 3D View: Structure | Electron Density

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

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

Macromolecule Content

• Total Structure Weight: 24617.35 
• Atom Count: 1462 
• Residue Count: 212 
• 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
• Expression System: Escherichia coli cell-free system


• 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: 2.6 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


• 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

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
Receptor activity-modifying protein 2	A	91	Homo sapiens	Mutation(s): 0  Gene Names: RAMP2
Find proteins for O60895 (Homo sapiens) Go to Gene View: RAMP2 Go to UniProtKB:  O60895

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details
Calcitonin gene-related peptide type 1 receptor	B	121	Homo sapiens	Mutation(s): 0  Gene Names: CALCRL (CGRPR)
Find proteins for Q16602 (Homo sapiens) Go to Gene View: CALCRL Go to UniProtKB:  Q16602

Small Molecules

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

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.6 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 = 90.00
b = 55.424	β = 90.00
c = 119.391	γ = 90.00

Software Package:

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

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
  Type: Database references