7S3J

Crystal Structure of AspB P450 in complex with brevianamide F substrates


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.94 Å
  • R-Value Free: 0.292 
  • R-Value Work: 0.226 
  • R-Value Observed: 0.229 

Starting Model: experimental
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Ligand Structure Quality Assessment 


This is version 1.4 of the entry. See complete history


Literature

Molecular Dynamics Simulations Guide Chimeragenesis and Engineered Control of Chemoselectivity in Diketopiperazine Dimerases.

Shende, V.V.Harris, N.R.Sanders, J.N.Newmister, S.A.Khatri, Y.Movassaghi, M.Houk, K.N.Sherman, D.H.

(2023) Angew Chem Int Ed Engl 62: e202210254-e202210254

  • DOI: https://doi.org/10.1002/anie.202210254
  • Primary Citation of Related Structures:  
    7S3J, 7S3T

  • PubMed Abstract: 

    In the biosynthesis of the tryptophan-linked dimeric diketopiperazines (DKPs), cytochromes P450 selectively couple DKP monomers to generate a variety of intricate and isomeric frameworks. To determine the molecular basis for selectivity of these biocatalysts we obtained a high-resolution crystal structure of selective Csp 2 -N bond forming dimerase, AspB. Overlay of the AspB structure onto C-C and C-N bond forming homolog NzeB revealed no significant structural variance to explain their divergent chemoselectivities. Molecular dynamics (MD) simulations identified a region of NzeB with increased conformational flexibility relative to AspB, and interchange of this region along with a single active site mutation led to a variant that catalyzes exclusive C-N bond formation. MD simulations also suggest that intermolecular C-C or C-N bond formation results from a change in mechanism, supported experimentally through use of a substrate mimic.


  • Organizational Affiliation

    Life Sciences Institute, University of Michigan, Ann Arbor, MÌ 48109, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
AspB
A, B
401Streptomyces sp. NRRL S-1868Mutation(s): 0 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
Sequence Annotations
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  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
HEM (Subject of Investigation/LOI)
Query on HEM

Download Ideal Coordinates CCD File 
C [auth A],
G [auth B]
PROTOPORPHYRIN IX CONTAINING FE
C34 H32 Fe N4 O4
KABFMIBPWCXCRK-RGGAHWMASA-L
QRP (Subject of Investigation/LOI)
Query on QRP

Download Ideal Coordinates CCD File 
D [auth A],
E [auth A],
H [auth B],
I [auth B]
(3S,8aS)-3-(1H-indol-3-ylmethyl)hexahydropyrrolo[1,2-a]pyrazine-1,4-dione
C16 H17 N3 O2
RYFZBPVMVYTEKZ-KBPBESRZSA-N
GOL
Query on GOL

Download Ideal Coordinates CCD File 
F [auth A],
J [auth B]
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.94 Å
  • R-Value Free: 0.292 
  • R-Value Work: 0.226 
  • R-Value Observed: 0.229 
  • Space Group: I 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 68.359α = 90
b = 100.619β = 92.76
c = 107.716γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
PDB_EXTRACTdata extraction
Cootmodel building
Aimlessdata scaling
PHASERphasing

Structure Validation

View Full Validation Report



Ligand Structure Quality Assessment 


Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Science Foundation (NSF, United States)United StatesCHE-1700982
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesR35 GM118101

Revision History  (Full details and data files)

  • Version 1.0: 2022-11-09
    Type: Initial release
  • Version 1.1: 2023-02-01
    Changes: Database references
  • Version 1.2: 2023-03-01
    Changes: Database references
  • Version 1.3: 2023-05-17
    Changes: Database references
  • Version 1.4: 2023-10-25
    Changes: Data collection, Refinement description