4DOE

The liganded structure of Cbescii CelA GH9 module


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.561 Å
  • R-Value Free: 0.175 
  • R-Value Work: 0.148 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Revealing nature's cellulase diversity: the digestion mechanism of Caldicellulosiruptor bescii CelA.

Brunecky, R.Alahuhta, M.Xu, Q.Donohoe, B.S.Crowley, M.F.Kataeva, I.A.Yang, S.J.Resch, M.G.Adams, M.W.Lunin, V.V.Himmel, M.E.Bomble, Y.J.

(2013) Science 342: 1513-1516

  • DOI: 10.1126/science.1244273
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Most fungi and bacteria degrade plant cell walls by secreting free, complementary enzymes that hydrolyze cellulose; however, some bacteria use large enzymatic assemblies called cellulosomes, which recruit complementary enzymes to protein scaffolds. T ...

    Most fungi and bacteria degrade plant cell walls by secreting free, complementary enzymes that hydrolyze cellulose; however, some bacteria use large enzymatic assemblies called cellulosomes, which recruit complementary enzymes to protein scaffolds. The thermophilic bacterium Caldicellulosiruptor bescii uses an intermediate strategy, secreting many free cellulases that contain multiple catalytic domains. One of these, CelA, comprises a glycoside hydrolase family 9 and a family 48 catalytic domain, as well as three type III cellulose-binding modules. In the saccharification of a common cellulose standard, Avicel, CelA outperforms mixtures of commercially relevant exo- and endoglucanases. From transmission electron microscopy studies of cellulose after incubation with CelA, we report morphological features that suggest that CelA not only exploits the common surface ablation mechanism driven by general cellulase processivity, but also excavates extensive cavities into the surface of the substrate. These results suggest that nature's repertoire of cellulose digestion paradigms remain only partially discovered and understood.


    Organizational Affiliation

    Biosciences Center, National Renewable Energy Laboratory, 15013 Denver West Parkway, Golden, CO 80401, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
1,4-beta-glucanase
A
475Caldicellulosiruptor besciiMutation(s): 0 
Gene Names: celA
EC: 3.2.1.4
Find proteins for P96311 (Caldicellulosiruptor bescii)
Go to UniProtKB:  P96311
Small Molecules
Ligands 7 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CBK
Query on CBK

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A
4-O-beta-D-glucopyranosyl-alpha-D-glucopyranose
C12 H22 O11
GUBGYTABKSRVRQ-MFRLZQSSSA-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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A
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
CA
Query on CA

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A
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
CT3
Query on CT3

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A
beta-D-glucopyranosyl-(1->4)-beta-D-glucopyranosyl-(1->4)-beta-D-glucopyranose
Beta-CELLOTRIOSE
C18 H32 O16
FYGDTMLNYKFZSV-CSHPIKHBSA-N
 Ligand Interaction
EDO
Query on EDO

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A
1,2-ETHANEDIOL
ETHYLENE GLYCOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
DIO
Query on DIO

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A
1,4-DIETHYLENE DIOXIDE
C4 H8 O2
RYHBNJHYFVUHQT-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.561 Å
  • R-Value Free: 0.175 
  • R-Value Work: 0.148 
  • Space Group: P 31 2 1
Unit Cell:
Length (Å)Angle (°)
a = 147.931α = 90.00
b = 147.931β = 90.00
c = 59.098γ = 120.00
Software Package:
Software NamePurpose
PROTEUM PLUSdata collection
MOLREPphasing
REFMACrefinement
PROTEUM PLUSdata reduction
PROTEUM PLUSdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-02-20
    Type: Initial release
  • Version 1.1: 2013-12-18
    Type: Database references
  • Version 1.2: 2014-01-08
    Type: Database references