7ZU8

Crystal Structure of the zymogen form of the glutamic-class prolyl-endopeptidase neprosin at 2.05 A resolution in presence of the crystallophore Lu-Xo4.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.05 Å
  • R-Value Free: 0.250 
  • R-Value Work: 0.209 
  • R-Value Observed: 0.210 

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Ligand Structure Quality Assessment 


This is version 1.0 of the entry. See complete history


Literature

Molecular and in vivo studies of a glutamate-class prolyl-endopeptidase for coeliac disease therapy.

Del Amo-Maestro, L.Mendes, S.R.Rodriguez-Banqueri, A.Garzon-Flores, L.Girbal, M.Rodriguez-Lagunas, M.J.Guevara, T.Franch, A.Perez-Cano, F.J.Eckhard, U.Gomis-Ruth, F.X.

(2022) Nat Commun 13: 4446-4446

  • DOI: 10.1038/s41467-022-32215-1
  • Primary Citation of Related Structures:  
    7ZU8, 7ZVA, 7ZVB, 7ZVC

  • PubMed Abstract: 
  • The digestion of gluten generates toxic peptides, among which a highly immunogenic proline-rich 33-mer from wheat α-gliadin, that trigger coeliac disease. Neprosin from the pitcher plant is a reported prolyl endopeptidase. Here, we produce recombinant neprosin and its mutants, and find that full-length neprosin is a zymogen, which is self-activated at gastric pH by the release of an all-β pro-domain via a pH-switch mechanism featuring a lysine plug ...

    The digestion of gluten generates toxic peptides, among which a highly immunogenic proline-rich 33-mer from wheat α-gliadin, that trigger coeliac disease. Neprosin from the pitcher plant is a reported prolyl endopeptidase. Here, we produce recombinant neprosin and its mutants, and find that full-length neprosin is a zymogen, which is self-activated at gastric pH by the release of an all-β pro-domain via a pH-switch mechanism featuring a lysine plug. The catalytic domain is an atypical 7+8-stranded β-sandwich with an extended active-site cleft containing an unprecedented pair of catalytic glutamates. Neprosin efficiently degrades both gliadin and the 33-mer in vitro under gastric conditions and is reversibly inactivated at pH > 5. Moreover, co-administration of gliadin and the neprosin zymogen at the ratio 500:1 reduces the abundance of the 33-mer in the small intestine of mice by up to 90%. Neprosin therefore founds a family of eukaryotic glutamate endopeptidases that fulfils requisites for a therapeutic glutenase.


    Organizational Affiliation

    Proteolysis Laboratory; Department of Structural Biology, Molecular Biology Institute of Barcelona (CSIC), Barcelona Science Park; c/Baldiri Reixac, 15-21, 08028, Barcelona, Catalonia, Spain. xgrcri@ibmb.csic.es.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Glutamyl endopeptidase NeprosinA389Nepenthes ventricosa x Nepenthes alataMutation(s): 0 
Gene Names: NvNpr
EC: 3.4.21.19
UniProt
Find proteins for A0A1L7NZU4 (Nepenthes alata)
Explore A0A1L7NZU4 
Go to UniProtKB:  A0A1L7NZU4
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA0A1L7NZU4
Protein Feature View
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  • Reference Sequence
Oligosaccharides

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Entity ID: 2
MoleculeChainsChain Length2D DiagramGlycosylation3D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-[alpha-L-fucopyranose-(1-6)]2-acetamido-2-deoxy-beta-D-glucopyranoseB 3N-Glycosylation Oligosaccharides Interaction
Entity ID: 3
MoleculeChainsChain Length2D DiagramGlycosylation3D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranoseC 2N-Glycosylation Oligosaccharides Interaction
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
K93
Query on K93

Download Ideal Coordinates CCD File 
D [auth A],
F [auth A]
12-oxidanyl-9,11$l^{3}-dioxa-1$l^{4},19$l^{4},22,27$l^{4},28$l^{4}-pentaza-10$l^{6}-lutetaoctacyclo[17.5.2.1^{3,7}.1^{10,13}.0^{1,10}.0^{10,19}.0^{10,28}.0^{17,27}]octacosa-3,5,7(28),11,13,15,17(27)-heptaen-8-one
C20 H24 Lu N5 O4
ZJNYWMGNALTZQP-UHFFFAOYSA-M
 Ligand Interaction
ACT
Query on ACT

Download Ideal Coordinates CCD File 
E [auth A],
G [auth A]
ACETATE ION
C2 H3 O2
QTBSBXVTEAMEQO-UHFFFAOYSA-M
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.05 Å
  • R-Value Free: 0.250 
  • R-Value Work: 0.209 
  • R-Value Observed: 0.210 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 86.65α = 90
b = 93.35β = 90
c = 48.69γ = 90
Software Package:
Software NamePurpose
PDB_EXTRACTdata extraction
XDSdata reduction
XSCALEdata scaling
AutoSolphasing
BUSTERrefinement
Cootmodel building

Structure Validation

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Ligand Structure Quality Assessment 


Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Not funded--

Revision History  (Full details and data files)

  • Version 1.0: 2022-08-10
    Type: Initial release