5E3X

Crystal structure of thermostable Carboxypeptidase (FisCP) from Fervidobacterium Islandicum AW-1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.197 Å
  • R-Value Free: 0.240 
  • R-Value Work: 0.177 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Biochemical and structural characterization of a keratin-degrading M32 carboxypeptidase from Fervidobacterium islandicum AW-1

Lee, Y.-J.Dhanasingh, I.Ahn, J.-S.Jin, H.-S.Choi, J.M.Lee, S.H.Lee, D.-W.

(2015) Biochem.Biophys.Res.Commun. 468: 927-933

  • DOI: 10.1016/j.bbrc.2015.11.058

  • PubMed Abstract: 
  • Comparative genomics of the keratin-degrading extremophilic eubacterium Fervidobacterium islandicum AW-1 and the closely related Fervidobacterium nodosum with no keratinolytic activity suggested that the FIAW1_1600 gene encoding a carboxypeptidase (C ...

    Comparative genomics of the keratin-degrading extremophilic eubacterium Fervidobacterium islandicum AW-1 and the closely related Fervidobacterium nodosum with no keratinolytic activity suggested that the FIAW1_1600 gene encoding a carboxypeptidase (CP) plays an important role in keratin degradation. The presumptive 489 amino acid sequence of the gene showed a conserved HEXXH motif with low levels of sequence identity (<38%) to reported thermostable M32 CPs. To identify its functional role, the FIAW1_1600 gene was overexpressed in Escherichia coli, and the recombinant enzyme was purified and characterized in detail. F. islandicum AW-1 CP (FisCP) formed a homodimer with a molecular mass of 107 kDa, and its apoenzyme exhibited maximal activity at 80 °C and pH 7.0 in the presence of Co(2+). This metalloenzyme mainly cleaved the C-termini of peptides with a basic amino acid sequence. The crystal structure of FisCP at 2.2 Å resolution showed high levels of structural similarities (root-mean-square deviations of <1.7 Å) to those of other M32 CP homologs. Remarkably, the enzyme significantly enhanced the degradation of native chicken feathers. This study suggests that FisCP, a keratinolytic member of the thermostable M32 CP family, plays an important role in keratin degradation for cellular metabolism in F. islandicum AW-1.


    Organizational Affiliation

    School of Applied Biosciences, Kyungpook National University, Daegu 702-701, South Korea.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Thermostable carboxypeptidase 1
A
489Fervidobacterium islandicumMutation(s): 0 
EC: 3.4.17.19
Find proteins for A0A140UHP3 (Fervidobacterium islandicum)
Go to UniProtKB:  A0A140UHP3
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CO
Query on CO

Download SDF File 
Download CCD File 
A
COBALT (II) ION
Co
XLJKHNWPARRRJB-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.197 Å
  • R-Value Free: 0.240 
  • R-Value Work: 0.177 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 107.105α = 90.00
b = 56.757β = 90.00
c = 89.183γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data scaling
Cootmodel building
HKL-2000data processing
MOLREPphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2016-02-10
    Type: Initial release