4FUS

The X-ray structure of Hahella chejuensis family 48 glycosyl hydrolase


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.75 Å
  • R-Value Free: 0.205 
  • R-Value Work: 0.154 
  • R-Value Observed: 0.156 

wwPDB Validation   3D Report Full Report


This is version 2.0 of the entry. See complete history


Literature

Sequence, structure, and evolution of cellulases in glycoside hydrolase family 48.

Sukharnikov, L.O.Alahuhta, M.Brunecky, R.Upadhyay, A.Himmel, M.E.Lunin, V.V.Zhulin, I.B.

(2012) J Biol Chem 287: 41068-41077

  • DOI: 10.1074/jbc.M112.405720
  • Primary Citation of Related Structures:  
    4FUS

  • PubMed Abstract: 
  • Currently, the cost of cellulase enzymes remains a key economic impediment to commercialization of biofuels. Enzymes from glycoside hydrolase family 48 (GH48) are a critical component of numerous natural lignocellulose-degrading systems. Although computational mining of large genomic data sets is a promising new approach for identifying novel cellulolytic activities, current computational methods are unable to distinguish between cellulases and enzymes with different substrate specificities that belong to the same protein family ...

    Currently, the cost of cellulase enzymes remains a key economic impediment to commercialization of biofuels. Enzymes from glycoside hydrolase family 48 (GH48) are a critical component of numerous natural lignocellulose-degrading systems. Although computational mining of large genomic data sets is a promising new approach for identifying novel cellulolytic activities, current computational methods are unable to distinguish between cellulases and enzymes with different substrate specificities that belong to the same protein family. We show that by using a robust computational approach supported by experimental studies, cellulases and non-cellulases can be effectively identified within a given protein family. Phylogenetic analysis of GH48 showed non-monophyletic distribution, an indication of horizontal gene transfer. Enzymatic function of GH48 proteins coded by horizontally transferred genes was verified experimentally, which confirmed that these proteins are cellulases. Computational and structural studies of GH48 enzymes identified structural elements that define cellulases and can be used to computationally distinguish them from non-cellulases. We propose that the structural element that can be used for in silico discrimination between cellulases and non-cellulases belonging to GH48 is an ω-loop located on the surface of the molecule and characterized by highly conserved rare amino acids. These markers were used to screen metagenomics data for "true" cellulases.


    Organizational Affiliation

    BioEnergy Science Center, University of Tennessee, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
RTX toxins and related Ca2+-binding proteinA695Hahella chejuensis KCTC 2396Mutation(s): 0 
Gene Names: HCH_02465
EC: 3.2.1.4
UniProt
Find proteins for Q2SJA2 (Hahella chejuensis (strain KCTC 2396))
Explore Q2SJA2 
Go to UniProtKB:  Q2SJA2
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ2SJA2
Protein Feature View
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  • Reference Sequence
Oligosaccharides

Help

Entity ID: 2
MoleculeChainsChain Length2D DiagramGlycosylation3D Interactions
beta-D-glucopyranose-(1-4)-beta-D-glucopyranoseB 2N/A Oligosaccharides Interaction
Glycosylation Resources
GlyTouCan:  G84824ZO
GlyCosmos:  G84824ZO
Small Molecules
Ligands 7 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PEG
Query on PEG

Download Ideal Coordinates CCD File 
C [auth A]DI(HYDROXYETHYL)ETHER
C4 H10 O3
MTHSVFCYNBDYFN-UHFFFAOYSA-N
 Ligand Interaction
PO4
Query on PO4

Download Ideal Coordinates CCD File 
I [auth A],
J [auth A]
PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
 Ligand Interaction
GOL
Query on GOL

Download Ideal Coordinates CCD File 
D [auth A],
E [auth A],
F [auth A],
G [auth A],
H [auth A]
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
EDO
Query on EDO

Download Ideal Coordinates CCD File 
O [auth A],
P [auth A],
Q [auth A],
R [auth A],
S [auth A],
O [auth A],
P [auth A],
Q [auth A],
R [auth A],
S [auth A],
T [auth A],
U [auth A],
V [auth A],
W [auth A],
X [auth A],
Y [auth A],
Z [auth A]
1,2-ETHANEDIOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
ACT
Query on ACT

Download Ideal Coordinates CCD File 
K [auth A],
L [auth A],
M [auth A],
N [auth A]
ACETATE ION
C2 H3 O2
QTBSBXVTEAMEQO-UHFFFAOYSA-M
 Ligand Interaction
CA
Query on CA

Download Ideal Coordinates CCD File 
AA [auth A]CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
NA
Query on NA

Download Ideal Coordinates CCD File 
BA [auth A],
CA [auth A]
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
OHI
Query on OHI
A L-PEPTIDE LINKINGC6 H7 N3 O3HIS
Biologically Interesting Molecules (External Reference) 1 Unique
Entity ID: 2
IDChainsNameType/Class2D Diagram3D Interactions
PRD_900005
Query on PRD_900005
Bbeta-cellobioseOligosaccharide / Metabolism Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.75 Å
  • R-Value Free: 0.205 
  • R-Value Work: 0.154 
  • R-Value Observed: 0.156 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 61.69α = 90
b = 78.389β = 98.94
c = 67.075γ = 90
Software Package:
Software NamePurpose
PROTEUM PLUSdata collection
MOLREPphasing
REFMACrefinement
PROTEUM PLUSdata reduction
PROTEUM PLUSdata scaling

Structure Validation

View Full Validation Report




Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-10-17
    Type: Initial release
  • Version 1.1: 2012-12-19
    Changes: Database references
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Advisory, Atomic model, Data collection, Database references, Derived calculations, Non-polymer description, Structure summary