3MTW

Crystal structure of L-Lysine, L-Arginine carboxypeptidase Cc2672 from Caulobacter Crescentus CB15 complexed with N-methyl phosphonate derivative of L-Arginine


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.7 Å
  • R-Value Free: 0.203 
  • R-Value Work: 0.180 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Functional Identification and Structure Determination of Two Novel Prolidases from cog1228 in the Amidohydrolase Superfamily

Xiang, D.F.Patskovsky, Y.Xu, C.Fedorov, A.A.Fedorov, E.V.Sisco, A.A.Sauder, J.M.Burley, S.K.Almo, S.C.Raushel, F.M.

(2010) Biochemistry 49: 6791-6803

  • DOI: 10.1021/bi100897u
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Two uncharacterized enzymes from the amidohydrolase superfamily belonging to cog1228 were cloned, expressed, and purified to homogeneity. The two proteins, Sgx9260c ( gi|44242006 ) and Sgx9260b ( gi|44479596 ), were derived from environmental DNA sam ...

    Two uncharacterized enzymes from the amidohydrolase superfamily belonging to cog1228 were cloned, expressed, and purified to homogeneity. The two proteins, Sgx9260c ( gi|44242006 ) and Sgx9260b ( gi|44479596 ), were derived from environmental DNA samples originating from the Sargasso Sea. The catalytic function and substrate profiles for Sgx9260c and Sgx9260b were determined using a comprehensive library of dipeptides and N-acyl derivative of l-amino acids. Sgx9260c catalyzes the hydrolysis of Gly-l-Pro, l-Ala-l-Pro, and N-acyl derivatives of l-Pro. The best substrate identified to date is N-acetyl-l-Pro with a value of k(cat)/K(m) of 3 x 10(5) M(-1) s(-1). Sgx9260b catalyzes the hydrolysis of l-hydrophobic l-Pro dipeptides and N-acyl derivatives of l-Pro. The best substrate identified to date is N-propionyl-l-Pro with a value of k(cat)/K(m) of 1 x 10(5) M(-1) s(-1). Three-dimensional structures of both proteins were determined by X-ray diffraction methods (PDB codes 3MKV and 3FEQ ). These proteins fold as distorted (beta/alpha)(8)-barrels with two divalent cations in the active site. The structure of Sgx9260c was also determined as a complex with the N-methylphosphonate derivative of l-Pro (PDB code 3N2C ). In this structure the phosphonate moiety bridges the binuclear metal center, and one oxygen atom interacts with His-140. The alpha-carboxylate of the inhibitor interacts with Tyr-231. The proline side chain occupies a small substrate binding cavity formed by residues contributed from the loop that follows beta-strand 7 within the (beta/alpha)(8)-barrel. A total of 38 other proteins from cog1228 are predicted to have the same substrate profile based on conservation of the substrate binding residues. The structure of an evolutionarily related protein, Cc2672 from Caulobacter crecentus, was determined as a complex with the N-methylphosphonate derivative of l-arginine (PDB code 3MTW ).


    Organizational Affiliation

    Department of Chemistry, P.O. Box 30012, Texas A&M University, College Station, Texas 77842-3012, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
L-Arginine carboxypeptidase Cc2672
A
403Caulobacter vibrioides (strain ATCC 19089 / CB15)Mutation(s): 0 
Find proteins for Q9A4Z9 (Caulobacter vibrioides (strain ATCC 19089 / CB15))
Go to UniProtKB:  Q9A4Z9
Small Molecules
Ligands 5 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

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A
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
SO4
Query on SO4

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A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
GOL
Query on GOL

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Download CCD File 
A
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
M3R
Query on M3R

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Download CCD File 
A
Methyl phosphonated L-Arginine
(2S)-5-carbamimidamido-2-[(hydroxy-methyl-phosphoryl)amino]pentanoic acid
C7 H17 N4 O4 P
BJBJPERGZRNAQZ-YFKPBYRVSA-N
 Ligand Interaction
PEG
Query on PEG

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A
DI(HYDROXYETHYL)ETHER
C4 H10 O3
MTHSVFCYNBDYFN-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
KCX
Query on KCX
A
L-PEPTIDE LINKINGC7 H14 N2 O4LYS
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
M3RKi: 92 nM BINDINGMOAD
M3RKi: 92 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.7 Å
  • R-Value Free: 0.203 
  • R-Value Work: 0.180 
  • Space Group: I 4 3 2
Unit Cell:
Length (Å)Angle (°)
a = 200.315α = 90.00
b = 200.315β = 90.00
c = 200.315γ = 90.00
Software Package:
Software NamePurpose
BALBESphasing
ADSCdata collection
PHENIXrefinement
SCALEPACKdata scaling
DENZOdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-07-28
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance