5WGR

Crystal Structure of Wild-type MalA', premalbrancheamide complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.362 Å
  • R-Value Free: 0.205 
  • R-Value Work: 0.151 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Function and Structure of MalA/MalA', Iterative Halogenases for Late-Stage C-H Functionalization of Indole Alkaloids.

Fraley, A.E.Garcia-Borras, M.Tripathi, A.Khare, D.Mercado-Marin, E.V.Tran, H.Dan, Q.Webb, G.P.Watts, K.R.Crews, P.Sarpong, R.Williams, R.M.Smith, J.L.Houk, K.N.Sherman, D.H.

(2017) J. Am. Chem. Soc. 139: 12060-12068

  • DOI: 10.1021/jacs.7b06773
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Malbrancheamide is a dichlorinated fungal indole alkaloid isolated from both Malbranchea aurantiaca and Malbranchea graminicola that belongs to a family of natural products containing a characteristic bicyclo[2.2.2]diazaoctane core. The introduction ...

    Malbrancheamide is a dichlorinated fungal indole alkaloid isolated from both Malbranchea aurantiaca and Malbranchea graminicola that belongs to a family of natural products containing a characteristic bicyclo[2.2.2]diazaoctane core. The introduction of chlorine atoms on the indole ring of malbrancheamide differentiates it from other members of this family and contributes significantly to its biological activity. In this study, we characterized the two flavin-dependent halogenases involved in the late-stage halogenation of malbrancheamide in two different fungal strains. MalA and MalA' catalyze the iterative dichlorination and monobromination of the free substrate premalbrancheamide as the final steps in the malbrancheamide biosynthetic pathway. Two unnatural bromo-chloro-malbrancheamide analogues were generated through MalA-mediated chemoenzymatic synthesis. Structural analysis and computational studies of MalA' in complex with three substrates revealed that the enzyme represents a new class of zinc-binding flavin-dependent halogenases and provides new insights into a potentially unique reaction mechanism.


    Organizational Affiliation

    Department of Chemistry and Biochemistry, University of California , Los Angeles, California 90095, United States.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Flavin-dependent halogenase
A
667Malbranchea aurantiacaMutation(s): 2 
Gene Names: malA
Find proteins for L0E155 (Malbranchea aurantiaca)
Go to UniProtKB:  L0E155
Small Molecules
Ligands 6 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

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A
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
SO4
Query on SO4

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A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
CL
Query on CL

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A
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
FAD
Query on FAD

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Download CCD File 
A
FLAVIN-ADENINE DINUCLEOTIDE
C27 H33 N9 O15 P2
VWWQXMAJTJZDQX-UYBVJOGSSA-N
 Ligand Interaction
PM7
Query on PM7

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Download CCD File 
A
(5aS,12aS,13aS)-12,12-dimethyl-2,3,11,12,12a,13-hexahydro-1H,5H,6H-5a,13a-(epiminomethano)indolizino[7,6-b]carbazol-14-one
premalbrancheamide E
C21 H25 N3 O
LBTZXCFDJFHPMI-DQLDELGASA-N
 Ligand Interaction
CD
Query on CD

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Download CCD File 
A
CADMIUM ION
Cd
WLZRMCYVCSSEQC-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.362 Å
  • R-Value Free: 0.205 
  • R-Value Work: 0.151 
  • Space Group: I 2 2 2
Unit Cell:
Length (Å)Angle (°)
a = 79.284α = 90.00
b = 120.619β = 90.00
c = 170.388γ = 90.00
Software Package:
Software NamePurpose
XDSdata scaling
PHENIXrefinement
AutoSolphasing
Aimlessdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Cancer InstituteUnited StatesR01 CA70375
National Institutes of Health/National Cancer InstituteUnited StatesR01 CA047135
National Institutes of Health/National Institute of General Medical SciencesUnited StatesR01 086374
National Science Foundation (United States)United StatesCHE-1205646

Revision History 

  • Version 1.0: 2017-08-16
    Type: Initial release
  • Version 1.1: 2017-09-06
    Type: Database references
  • Version 1.2: 2017-09-20
    Type: Author supporting evidence, Refinement description