Biological Assembly 1  

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

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

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

Macromolecule Content

• Total Structure Weight: 52.73 kDa 
• Atom Count: 4360 
• Modelled Residue Count: 473 
• Deposited Residue Count: 482 
• Unique protein chains: 1

5JXG

Structure of the unliganded form of the proprotein convertase furin.

• PDB DOI: 10.2210/pdb5JXG/pdb

• Classification: HYDROLASE
• Organism(s): Homo sapiens
• Expression System: Homo sapiens
• Mutation(s): No 


• Deposited: 2016-05-13 Released: 2016-10-05 
• Deposition Author(s): Dahms, S.O., Arciniega, M., Steinmetzer, T., Huber, R., Than, M.E.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Free: 0.173 
• R-Value Work: 0.154 
• R-Value Observed: 0.155 

Literature

Structure of the unliganded form of the proprotein convertase furin suggests activation by a substrate-induced mechanism.

Dahms, S.O., Arciniega, M., Steinmetzer, T., Huber, R., Than, M.E.

(2016) Proc Natl Acad Sci U S A 113: 11196-11201

• PubMed: 27647913 
• DOI: 10.1073/pnas.1613630113
• Primary Citation of Related Structures:  
  5JXG, 5JXH, 5JXI, 5JXJ


• PubMed Abstract: 
  

Proprotein convertases (PCs) are highly specific proteases required for the proteolytic modification of many secreted proteins. An unbalanced activity of these enzymes is connected to pathologies like cancer, atherosclerosis, hypercholesterolaemia, and infectious diseases. Novel protein crystallographic structures of the prototypical PC family member furin in different functional states were determined to 1.8-2.0 Å. These, together with biochemical data and modeling by molecular dynamics calculations, suggest essential elements underlying its unusually high substrate specificity. Furin shows a complex activation mechanism and exists in at least four defined states: (i) the "off state," incompatible with substrate binding as seen in the unliganded enzyme; (ii) the active "on state" seen in inhibitor-bound furin; and the respective (iii) calcium-free and (iv) calcium-bound forms. The transition from the off to the on state is triggered by ligand binding at subsites S1 to S4 and appears to underlie the preferential recognition of the four-residue sequence motif of furin. The molecular dynamics simulations of the four structural states reflect the experimental observations in general and provide approximations of the respective stabilities. Ligation by calcium at the PC-specific binding site II influences the active-site geometry and determines the rotamer state of the oxyanion hole-forming Asn295, and thus adds a second level of the activity modulation of furin. The described crystal forms and the observations of different defined functional states may foster the development of new tools and strategies for pharmacological intervention targeting furin.

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Organizational Affiliation: 

Protein Crystallography Group, Leibniz Institute on Aging-Fritz Lipmann Institute (FLI), 07745 Jena, Germany; [e-mail] [e-mail].

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Furin	A	482	Homo sapiens	Mutation(s): 0  Gene Names: FURIN, FUR, PACE, PCSK3 EC: 3.4.21.75
UniProt & NIH Common Fund Data Resources
Find proteins for P09958 (Homo sapiens) Explore P09958  Go to UniProtKB:  P09958
PHAROS:  P09958 GTEx:  ENSG00000140564

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
CA	B [auth A], C [auth A], D [auth A]	CALCIUM ION Ca BHPQYMZQTOCNFJ-UHFFFAOYSA-N
CL	M [auth A]	CHLORIDE ION Cl VEXZGXHMUGYJMC-UHFFFAOYSA-M
NA	E [auth A], F [auth A], G [auth A], H [auth A], I [auth A], J [auth A], K [auth A], L [auth A]	SODIUM ION Na FKNQFGJONOIPTF-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Free: 0.173 
• R-Value Work: 0.154 
• R-Value Observed: 0.155 
• Space Group: P 6₅ 2 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 131.957	α = 90
b = 131.957	β = 90
c = 155.634	γ = 120

Software Package:

Software Name	Purpose
PHENIX	refinement
XDS	data reduction
XDS	data scaling
PHASER	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2016-05-13 
• Released Date: 2016-10-05 
Deposition Author(s): Dahms, S.O., Arciniega, M., Steinmetzer, T., Huber, R., Than, M.E.

Revision History  

• Version 1.0: 2016-10-05
  Type: Initial release
  
• Version 1.1: 2016-10-12
  Changes: Structure summary
• Version 1.2: 2016-10-19
  Changes: Database references