3FEQ

Crystal structure of uncharacterized protein eah89906

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.63 Å
  • R-Value Free: 0.281 
  • R-Value Work: 0.238 
  • R-Value Observed: 0.239 

wwPDB Validation 3D Report Full Report


This is version 1.3 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
  • Structures With Same Primary Citation

  • 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
PUTATIVE AMIDOHYDROLASE
A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P
423unidentifiedMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN
Download CCD File 
A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.63 Å
  • R-Value Free: 0.281 
  • R-Value Work: 0.238 
  • R-Value Observed: 0.239 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 113.208α = 81.75
b = 108.048β = 80.36
c = 171.132γ = 74.4
Software Package:
Software NamePurpose
MOLREPphasing
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-12-16
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2012-10-10
    Changes: Database references
  • Version 1.3: 2018-11-21
    Changes: Data collection, Database references, Structure summary