4FLC

Structural and Biochemical Characterization of Human Adenylosuccinate Lyase (ADSL) and the R303C ADSL Deficiency Associated Mutation


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.298 
  • R-Value Work: 0.230 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural and Biochemical Characterization of Human Adenylosuccinate Lyase (ADSL) and the R303C ADSL Deficiency-Associated Mutation.

Ray, S.P.Deaton, M.K.Capodagli, G.C.Calkins, L.A.Sawle, L.Ghosh, K.Patterson, D.Pegan, S.D.

(2012) Biochemistry 51: 6701-6713

  • DOI: 10.1021/bi300796y
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Adenylosuccinate lyase (ADSL) deficiency is a rare autosomal recessive disorder, which causes a defect in purine metabolism resulting in neurological and physiological symptoms. ADSL executes two nonsequential steps in the de novo synthesis of AMP: t ...

    Adenylosuccinate lyase (ADSL) deficiency is a rare autosomal recessive disorder, which causes a defect in purine metabolism resulting in neurological and physiological symptoms. ADSL executes two nonsequential steps in the de novo synthesis of AMP: the conversion of phosphoribosylsuccinyl-aminoimidazole carboxamide (SAICAR) to phosphoribosylaminoimidazole carboxamide, which occurs in the de novo synthesis of IMP, and the conversion of adenylosuccinate to AMP, which occurs in the de novo synthesis of AMP and also in the purine nucleotide cycle, using the same active site. Mutation of ADSL's arginine 303 to a cysteine is known to lead to ADSL deficiency. Interestingly, unlike other mutations leading to ADSL deficiency, the R303C mutation has been suggested to more significantly affect the enzyme's ability to catalyze the conversion of succinyladenosine monophosphate than that of SAICAR to their respective products. To better understand the causation of disease due to the R303C mutation, as well as to gain insights into why the R303C mutation potentially has a disproportional decrease in activity toward its substrates, the wild type (WT) and the R303C mutant of ADSL were investigated enzymatically and thermodynamically. Additionally, the X-ray structures of ADSL in its apo form as well as with the R303C mutation were elucidated, providing insight into ADSL's cooperativity. By utilizing this information, a model for the interaction between ADSL and SAICAR is proposed.


    Organizational Affiliation

    Department of Physics and Astronomy, University of Denver, Denver, CO 80208-0183, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Adenylosuccinate lyase
A, B, C, D
487Homo sapiensMutation(s): 1 
Gene Names: ADSL (AMPS)
EC: 4.3.2.2
Find proteins for P30566 (Homo sapiens)
Go to Gene View: ADSL
Go to UniProtKB:  P30566
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.298 
  • R-Value Work: 0.230 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 85.799α = 90.00
b = 105.562β = 90.00
c = 217.221γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data collection
HKL-2000data reduction
REFMACrefinement
PHASERphasing
PDB_EXTRACTdata extraction
HKL-2000data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-08-01
    Type: Initial release
  • Version 1.1: 2012-09-12
    Type: Database references