5ZWT

Crystal structure of the S37A mutant of apo-acyl carrier protein from Leishmania major


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.272 
  • R-Value Work: 0.234 
  • R-Value Observed: 0.236 

wwPDB Validation 3D Report Full Report



Literature

A conformational switch from a closed apo- to an open holo-form equips the acyl carrier protein for acyl chain accommodation.

Arya, R.Sharma, B.Dhembla, C.Pal, R.K.Patel, A.K.Sundd, M.Ghosh, B.Makde, R.D.Kundu, S.

(2018) Biochim Biophys Acta Proteins Proteom 1867: 163-174

  • DOI: 10.1016/j.bbapap.2018.12.001
  • Primary Citation of Related Structures:  
    5ZWS, 5ZWT

  • PubMed Abstract: 
  • Acyl carrier proteins (ACPs) play crucial roles in the biosynthesis of fatty acids, non-ribosomal polypeptides and polyketides. The three-dimensional NMR structure of Leishmania major holo-LmACP, belonging to the type II pathway, has been reported pr ...

    Acyl carrier proteins (ACPs) play crucial roles in the biosynthesis of fatty acids, non-ribosomal polypeptides and polyketides. The three-dimensional NMR structure of Leishmania major holo-LmACP, belonging to the type II pathway, has been reported previously, but the structure of its apo-form and its conformational differences with the holo-form remain to be explored. Here we report the crystal structures of apo-LmACP (wild-type and S37A mutant) at 2.0 Å resolution and compare their key features with the structures of holo-LmACP (wild-type) and other type II ACPs from Escherichia coli and Plasmodium falciparum. The crystal structure of apo-LmACP, which is homologous to other type II ACPs, displays some key structural rearrangements as compared to its holo-structure. Contrary to holo-form, which exists predominantly as a monomer, the apo-form exists as a mixture of monomeric and dimeric population in solution. In contrast to the closed structure of apo-LmACP, holo-LmACP structure was observed in an open conformation as a result of reorganization of specific helices and loops. We propose that the structural changes exhibited by LmACP occur due to the attachment of the phosphopantetheine arm and may be a prerequisite for the initiation of fatty acid synthesis. The movement of helix 3 may also play a role in the dissociation of holo-LmACP from its cognate enzymes of the FAS II pathway.


    Organizational Affiliation

    Department of Biochemistry, University of Delhi South Campus, New Delhi 110021, India. Electronic address: suman.kundu@south.du.ac.in.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Acyl carrier proteinAB83Leishmania majorMutation(s): 1 
Gene Names: ACPLMJF_27_0290
Find proteins for E9AD06 (Leishmania major)
Explore E9AD06 
Go to UniProtKB:  E9AD06
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.272 
  • R-Value Work: 0.234 
  • R-Value Observed: 0.236 
  • Space Group: I 4 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 83.506α = 90
b = 83.506β = 90
c = 99.584γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
PHASERphasing
Aimlessdata scaling
XDSdata reduction
MAR345dtbdata collection

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2019-01-16
    Type: Initial release