5JXG

Structure of the unliganded form of the proprotein convertase furin.


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 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


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

  • DOI: 10.1073/pnas.1613630113
  • Structures With Same Primary Citation

  • 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, a ...

    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.


    Organizational Affiliation

    Protein Crystallography Group, Leibniz Institute on Aging-Fritz Lipmann Institute (FLI), 07745 Jena, Germany; manuel.than@leibniz-fli.de huber@biochem.mpg.de.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Furin
A
482Homo sapiensMutation(s): 0 
Gene Names: FURINFURPACEPCSK3
EC: 3.4.21.75
Find proteins for P09958 (Homo sapiens)
Go to UniProtKB:  P09958
NIH Common Fund Data Resources
PHAROS  P09958
Protein Feature View
  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA

Download CCD File 
A
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
CL
Query on CL

Download CCD File 
A
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
NA
Query on NA

Download CCD File 
A
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
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 = 131.957α = 90
b = 131.957β = 90
c = 155.634γ = 120
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
XDSdata scaling
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

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