4OGW

Structure of a human CD38 mutant complexed with NMN


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.05 Å
  • R-Value Free: 0.262 
  • R-Value Work: 0.198 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

A pre-steady state and steady state kinetic analysis of the N-ribosyl hydrolase activity of hCD157.

Preugschat, F.Carter, L.H.Boros, E.E.Porter, D.J.Stewart, E.L.Shewchuk, L.M.

(2014) Arch.Biochem.Biophys. 564C: 156-163

  • DOI: 10.1016/j.abb.2014.09.008

  • PubMed Abstract: 
  • hCD157 catalyzes the hydrolysis of nicotinamide riboside (NR) and nicotinic acid riboside (NAR). The release of nicotinamide or nicotinic acid from NR or NAR was confirmed by spectrophotometric, HPLC and NMR analyses. hCD157 is inactivated by a mecha ...

    hCD157 catalyzes the hydrolysis of nicotinamide riboside (NR) and nicotinic acid riboside (NAR). The release of nicotinamide or nicotinic acid from NR or NAR was confirmed by spectrophotometric, HPLC and NMR analyses. hCD157 is inactivated by a mechanism-based inhibitor, 2'-deoxy-2'-fluoro-nicotinamide arabinoside (fNR). Modification of the enzyme during the catalytic cycle by NR, NAR, or fNR increased the intrinsic protein fluorescence by approximately 50%. Pre-steady state and steady state data were used to derive a minimal kinetic scheme for the hydrolysis of NR. After initial complex formation a reversible step (360 and 30s(-1)) is followed by a slow irreversible step (0.1s(-1)) that defined the rate limiting step, or kcat. The calculated KMapp value for NR in the hydrolytic reaction is 6nM. The values of the kinetic constants suggest that one biological function of cell-surface hCD157 is to bind and slowly hydrolyze NR, possibly converting it to a ligand-activated receptor. Differences in substrate preference between hCD157 and hCD38 were rationalized through a comparison of the crystal structures of the two proteins. This comparison identified several residues in hCD157 (F108 and F173) that can potentially hinder the binding of dinucleotide substrates (NAD+).


    Organizational Affiliation

    Muscle Metabolism Discovery Performance Unit, GlaxoSmithKline, 5 Moore Drive, 3.2094, Research Triangle Park, NC 27709, United States. Electronic address: Frank.X.Preugschat@gsk.com.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ADP-ribosyl cyclase 1
A
257Homo sapiensMutation(s): 5 
Gene Names: CD38
EC: 3.2.2.6
Find proteins for P28907 (Homo sapiens)
Go to Gene View: CD38
Go to UniProtKB:  P28907
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NMN
Query on NMN

Download SDF File 
Download CCD File 
A
BETA-NICOTINAMIDE RIBOSE MONOPHOSPHATE
NICOTINAMIDE MONONUCLEOTIDE
C11 H16 N2 O8 P
DAYLJWODMCOQEW-TURQNECASA-O
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.05 Å
  • R-Value Free: 0.262 
  • R-Value Work: 0.198 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 49.341α = 90.00
b = 64.467β = 90.00
c = 73.501γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data collection
MOLREPphasing
HKL-2000data scaling
HKL-2000data reduction
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-10-08
    Type: Initial release
  • Version 1.1: 2014-12-17
    Type: Database references