5L44

Structure of K-26-DCP in complex with the K-26 tripeptide


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.75 Å
  • R-Value Free: 0.213 
  • R-Value Work: 0.185 
  • R-Value Observed: 0.187 

Starting Model: experimental
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Ligand Structure Quality Assessment 


This is version 1.3 of the entry. See complete history


Literature

Crystal structure of a peptidyl-dipeptidase K-26-DCP from Actinomycete in complex with its natural inhibitor.

Masuyer, G.Cozier, G.E.Kramer, G.J.Bachmann, B.O.Acharya, K.R.

(2016) FEBS J 283: 4357-4369

  • DOI: https://doi.org/10.1111/febs.13928
  • Primary Citation of Related Structures:  
    5L43, 5L44

  • PubMed Abstract: 

    Several soil-derived Actinobacteria produce secondary metabolites that are proven specific and potent inhibitors of the human angiotensin-I-converting enzyme (ACE), a key target for the modulation of hypertension through its role in the renin-angiotensin-aldosterone system. K-26-DCP is a zinc dipeptidyl carboxypeptidase (DCP) produced by Astrosporangium hypotensionis, and an ancestral homologue of ACE. Here we report the high-resolution crystal structures of K-26-DCP and of its complex with the natural microbial tripeptide product K-26. The experimental results provide the structural basis for better understanding the specificity of K-26 for human ACE over bacterial DCPs. Structural data are available in the PDB under the accession numbers 5L43 and 5L44.


  • Organizational Affiliation

    Department of Biology and Biochemistry, University of Bath, UK.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
K-26 dipeptidyl carboxypeptidase
A, B
683Astrosporangium hypotensionis K-26Mutation(s): 0 
UniProt
Find proteins for A0A1L1QK30 (Astrosporangium hypotensionis K-26)
Explore A0A1L1QK30 
Go to UniProtKB:  A0A1L1QK30
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA0A1L1QK30
Sequence Annotations
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  • Reference Sequence
Small Molecules
Ligands 4 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
K26
Query on K26

Download Ideal Coordinates CCD File 
G [auth A],
L [auth B]
N-ACETYL-L-ILE-L-TYR-(R)-1-AMINO-2-(4-HYDROXYPHENYL)ETHYLPHOSPHONIC ACID
C25 H34 N3 O8 P
ZFRNBYWFOLDQKG-FDMHNHSTSA-N
SO4
Query on SO4

Download Ideal Coordinates CCD File 
F [auth A],
K [auth B]
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
ZN
Query on ZN

Download Ideal Coordinates CCD File 
C [auth A],
H [auth B]
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
MG
Query on MG

Download Ideal Coordinates CCD File 
D [auth A],
E [auth A],
I [auth B],
J [auth B]
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.75 Å
  • R-Value Free: 0.213 
  • R-Value Work: 0.185 
  • R-Value Observed: 0.187 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 61.58α = 97.72
b = 66.94β = 90.71
c = 102γ = 117.37
Software Package:
Software NamePurpose
REFMACrefinement
iMOSFLMdata reduction
Aimlessdata scaling
PHASERphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2016-10-26
    Type: Initial release
  • Version 1.1: 2016-11-02
    Changes: Database references
  • Version 1.2: 2016-12-14
    Changes: Database references
  • Version 1.3: 2024-01-10
    Changes: Data collection, Database references, Derived calculations, Refinement description