Biological Assembly 1  

 3D View: Structure | 1D-3D View | Electron Density | Validation Report | Ligand Interaction

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: 46.34 kDa 
• Atom Count: 3505 
• Modelled Residue Count: 392 
• Deposited Residue Count: 396 
• Unique protein chains: 2

3MZG

Crystal structure of a human prolactin receptor antagonist in complex with the extracellular domain of the human prolactin receptor

• PDB DOI: 10.2210/pdb3MZG/pdb

• Classification: HORMONE/HORMONE RECEPTOR
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21
• Mutation(s): Yes 


• Deposited: 2010-05-12 Released: 2010-09-29 
• Deposition Author(s): Kulkarni, M.V., Tettamanzi, M.C., Murphy, J.W., Keeler, C., Myszka, D.G., Chayen, N.E., Lolis, E.J., Hodsdon, M.E.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.10 Å
• R-Value Free: 0.230 
• R-Value Work: 0.187 
• R-Value Observed: 0.189 

Literature

Two Independent Histidines, One in Human Prolactin and One in Its Receptor, Are Critical for pH-dependent Receptor Recognition and Activation.

Kulkarni, M.V., Tettamanzi, M.C., Murphy, J.W., Keeler, C., Myszka, D.G., Chayen, N.E., Lolis, E.J., Hodsdon, M.E.

(2010) J Biol Chem 285: 38524-38533

• PubMed: 20889499 
• DOI: 10.1074/jbc.M110.172072
• Primary Citation of Related Structures:  
  3MZG, 3N06, 3N0P, 3NCB, 3NCC, 3NCE, 3NCF


• PubMed Abstract: 
  

Human prolactin (hPRL), a member of the family of hematopoietic cytokines, functions as both an endocrine hormone and autocrine/paracrine growth factor. We have previously demonstrated that recognition of the hPRL·receptor depends strongly on solution acidity over the physiologic range from pH 6 to pH 8. The hPRL·receptor binding interface contains four histidines whose protonation is hypothesized to regulate pH-dependent receptor recognition. Here, we systematically dissect its molecular origin by characterizing the consequences of His to Ala mutations on pH-dependent receptor binding kinetics, site-specific histidine protonation, and high resolution structures of the intermolecular interface. Thermodynamic modeling of the pH dependence to receptor binding affinity reveals large changes in site-specific protonation constants for a majority of interface histidines upon complexation. Removal of individual His imidazoles reduces these perturbations in protonation constants, which is most likely explained by the introduction of solvent-filled, buried cavities in the crystallographic structures without inducing significant conformational rearrangements.

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Organizational Affiliation: 

Department of Laboratory Medicine, Yale School of Medicine, New Haven, Connecticut 06520, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Prolactin	A	186	Homo sapiens	Mutation(s): 1  Gene Names: PRL, Prolactin
UniProt & NIH Common Fund Data Resources
Find proteins for P01236 (Homo sapiens) Explore P01236  Go to UniProtKB:  P01236
PHAROS:  P01236 GTEx:  ENSG00000172179

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Prolactin receptor	B	210	Homo sapiens	Mutation(s): 0  Gene Names: PRLR, Prolactin receptor
UniProt & NIH Common Fund Data Resources
Find proteins for P16471 (Homo sapiens) Explore P16471  Go to UniProtKB:  P16471
PHAROS:  P16471 GTEx:  ENSG00000113494

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
CL	D [auth B]	CHLORIDE ION Cl VEXZGXHMUGYJMC-UHFFFAOYSA-M
NA	C [auth B], E [auth B], F [auth B]	SODIUM ION Na FKNQFGJONOIPTF-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.10 Å
• R-Value Free: 0.230 
• R-Value Work: 0.187 
• R-Value Observed: 0.189 
• Space Group: P 6₅

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 123.874	α = 90
b = 123.874	β = 90
c = 72.468	γ = 120

Software Package:

Software Name	Purpose
CBASS	data collection
PHASER	phasing
REFMAC	refinement
HKL-2000	data reduction
HKL-2000	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2010-05-12 
• Released Date: 2010-09-29 
Deposition Author(s): Kulkarni, M.V., Tettamanzi, M.C., Murphy, J.W., Keeler, C., Myszka, D.G., Chayen, N.E., Lolis, E.J., Hodsdon, M.E.

Revision History  

• Version 1.0: 2010-09-29
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance