2CTC

THE HIGH RESOLUTION CRYSTAL STRUCTURE OF THE COMPLEX BETWEEN CARBOXYPEPTIDASE A AND L-PHENYL LACTATE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.40 Å
  • R-Value Observed: 0.160 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

High-resolution structure of the complex between carboxypeptidase A and L-phenyl lactate.

Teplyakov, A.Wilson, K.S.Orioli, P.Mangani, S.

(1993) Acta Crystallogr D Biol Crystallogr 49: 534-540

  • DOI: 10.1107/S0907444993007267
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • The X-ray structures of native carboxypeptidase A and of the enzyme-inhibitor complex with L-phenyl lactate have been refined at 1.54 and 1.45 A resolution to R factors of 0.151 and 0.161, respectively. Crystals of the complex were isomorphous with t ...

    The X-ray structures of native carboxypeptidase A and of the enzyme-inhibitor complex with L-phenyl lactate have been refined at 1.54 and 1.45 A resolution to R factors of 0.151 and 0.161, respectively. Crystals of the complex were isomorphous with the native crystals (space group P2(1), a = 51.60, b = 60.27, c = 47.25 A, beta = 97.27 degrees ). The high-resolution electron density allowed correction of many side-chain positions in the classical carboxypeptidase A model. This reflects the advantages of the high-quality complete synchrotron data collected with an imaging plate detector. The conformational changes in the active centre of the enzyme upon binding of the inhibitor are restricted to only two residues, Tyr248 and Arg145. L-Phenyl lactate is bound in the S1' pocket and forms hydrogen bonds to Arg145, Glu270 and to the zinc-bound water molecule. The present structure provides an explanation for the higher stability of the complexes with the products of esterolysis in comparison with those of amidolysis. This is consistent with the finding that product release is rate limiting for esters but not for peptides.


    Organizational Affiliation

    EMBL, c/o DESY, Hamburg, Germany.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
CARBOXYPEPTIDASE A
A
307Bos taurusMutation(s): 0 
Gene Names: CPA1CPA
EC: 3.4.17.1
Find proteins for P00730 (Bos taurus)
Go to UniProtKB:  P00730
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
HFA
Query on HFA

Download CCD File 
A
ALPHA-HYDROXY-BETA-PHENYL-PROPIONIC ACID
C9 H10 O3
VOXXWSYKYCBWHO-QMMMGPOBSA-N
 Ligand Interaction
ZN
Query on ZN

Download CCD File 
A
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
HFAKi:  129999.9921875   nM  Binding MOAD
LOFKi :  129999.9921875   nM  PDBBind
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.40 Å
  • R-Value Observed: 0.160 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 51.6α = 90
b = 60.27β = 97.27
c = 47.25γ = 90
Software Package:
Software NamePurpose
PROLSQrefinement

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1994-01-31
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2017-11-29
    Changes: Derived calculations, Other