2EHQ

Crystal analysis of 1-pyrroline-5-carboxylate dehydrogenase from thermus with bound NADP


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.55 Å
  • R-Value Free: 0.180 
  • R-Value Work: 0.158 
  • R-Value Observed: 0.159 

Starting Model: experimental
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This is version 1.3 of the entry. See complete history


Literature

New insights into the binding mode of coenzymes: structure of Thermus thermophilus Delta1-pyrroline-5-carboxylate dehydrogenase complexed with NADP+.

Inagaki, E.Ohshima, N.Sakamoto, K.Babayeva, N.D.Kato, H.Yokoyama, S.Tahirov, T.H.

(2007) Acta Crystallogr Sect F Struct Biol Cryst Commun 63: 462-465

  • DOI: https://doi.org/10.1107/S1744309107021422
  • Primary Citation of Related Structures:  
    2EHQ

  • PubMed Abstract: 

    Delta(1)-Pyrroline-5-carboxylate dehydrogenase (P5CDh) is known to preferentially use NAD(+) as a coenzyme. The k(cat) value of Thermus thermophilus P5CDh (TtP5CDh) is four times lower for NADP(+) than for NAD(+). The crystal structure of NADP(+)-bound TtP5CDh was solved in order to study the structure-activity relationships for the coenzymes. The binding mode of NADP(+) is essentially identical to that in the previously solved NAD(+)-bound form, except for the regions around the additional 2'-phosphate group of NADP(+). The coenzyme-binding site can only accommodate this group by the rotation of a glutamate residue and subtle shifts in the main chain. The 2'-phosphate of NADP(+) increases the number of hydrogen bonds between TtP5CDh and NADP(+) compared with that between TtP5CDh and NAD(+). Furthermore, the phosphate of the bound NADP(+) would restrict the ;bending' of the coenzyme because of steric hindrance. Such bending is important for dissociation of the coenzymes. These results provide a plausible explanation of the lower turnover rate of NADP(+) compared with NAD(+).


  • Organizational Affiliation

    RIKEN SPring-8 Center, Harima Institute, Japan.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
1-pyrroline-5-carboxylate dehydrogenase
A, B
516Thermus thermophilus HB8Mutation(s): 0 
EC: 1.5.1.12 (PDB Primary Data), 1.2.1.88 (UniProt)
UniProt
Find proteins for Q5SI02 (Thermus thermophilus (strain ATCC 27634 / DSM 579 / HB8))
Explore Q5SI02 
Go to UniProtKB:  Q5SI02
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ5SI02
Sequence Annotations
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  • Reference Sequence
Small Molecules
Ligands 4 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
NAP
Query on NAP

Download Ideal Coordinates CCD File 
F [auth A],
M [auth B]
NADP NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE
C21 H28 N7 O17 P3
XJLXINKUBYWONI-NNYOXOHSSA-N
MPD
Query on MPD

Download Ideal Coordinates CCD File 
G [auth A]
H [auth A]
I [auth A]
N [auth B]
O [auth B]
G [auth A],
H [auth A],
I [auth A],
N [auth B],
O [auth B],
P [auth B],
Q [auth B]
(4S)-2-METHYL-2,4-PENTANEDIOL
C6 H14 O2
SVTBMSDMJJWYQN-YFKPBYRVSA-N
ACT
Query on ACT

Download Ideal Coordinates CCD File 
C [auth A],
D [auth A],
J [auth B],
K [auth B]
ACETATE ION
C2 H3 O2
QTBSBXVTEAMEQO-UHFFFAOYSA-M
NA
Query on NA

Download Ideal Coordinates CCD File 
E [auth A],
L [auth B]
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.55 Å
  • R-Value Free: 0.180 
  • R-Value Work: 0.158 
  • R-Value Observed: 0.159 
  • Space Group: H 3
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 102.426α = 90
b = 102.426β = 90
c = 278.837γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
BSSdata collection
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2007-05-01
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Source and taxonomy, Version format compliance
  • Version 1.3: 2023-10-25
    Changes: Data collection, Database references, Derived calculations, Refinement description