Solution structure of the 49 aa presequence of 5-ALAS

Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 30 
  • Conformers Submitted: 30 
  • Selection Criteria: LOW TARGET FUNCTION 

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The Solution Structure and Heme Binding of the Presequence of Murine 5-Aminolevulinate Synthase

Goodfellow, B.J.Dias, J.S.Ferreira, G.C.Henklein, P.Wray, V.Macedo, A.L.

(2001) FEBS Lett 505: 325

  • DOI: https://doi.org/10.1016/s0014-5793(01)02818-6
  • Primary Citation of Related Structures:  
    1H7D, 1H7J

  • PubMed Abstract: 

    The mitochondrial import of 5-aminolevulinate synthase (ALAS), the first enzyme of the mammalian heme biosynthetic pathway, requires the N-terminal presequence. The 49 amino acid presequence transit peptide (psALAS) for murine erythroid ALAS was chemically synthesized, and circular dichroism and (1)H nuclear magnetic resonance (NMR) spectroscopies used to determine structural elements in trifluoroethanol/H(2)O solutions and micellar environments. A well defined amphipathic alpha-helix, spanning L22 to F33, was present in psALAS in 50% trifluoroethanol. Further, a short alpha-helix, defined by A5-L8, was also apparent in the 26 amino acid N-terminus peptide, when its structure was determined in sodium dodecyl sulfate. Heme inhibition of ALAS mitochondrial import has been reported to be mediated through cysteine residues in presequence heme regulatory motifs (HRMs). A UV/visible and (1)H NMR study of hemin and psALAS indicated that a heme-peptide interaction occurs and demonstrates, for the first time, that heme interacts with the HRMs of psALAS.

  • Organizational Affiliation

    Departamento de Quimica, Universidade de Aveiro, 3810-193 Aviero, Portugal.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Find proteins for P08680 (Mus musculus)
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Go to UniProtKB:  P08680
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UniProt GroupP08680
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 30 
  • Conformers Submitted: 30 
  • Selection Criteria: LOW TARGET FUNCTION 

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2001-10-18
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2024-05-15
    Changes: Data collection, Database references, Other