7MKR

Crystal structure of the GH12 domain from Acidothermus cellulolyticus GuxA


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.50 Å
  • R-Value Free: 0.171 
  • R-Value Work: 0.129 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Characterization of the Biomass Degrading Enzyme GuxA from Acidothermus cellulolyticus.

Hengge, N.N.Mallinson, S.J.B.Pason, P.Lunin, V.V.Alahuhta, M.Chung, D.Himmel, M.E.Westpheling, J.Bomble, Y.J.

(2022) Int J Mol Sci 23

  • DOI: https://doi.org/10.3390/ijms23116070
  • Primary Citation of Related Structures:  
    7MKR, 7MKS

  • PubMed Abstract: 

    Microbial conversion of biomass relies on a complex combination of enzyme systems promoting synergy to overcome biomass recalcitrance. Some thermophilic bacteria have been shown to exhibit particularly high levels of cellulolytic activity, making them of particular interest for biomass conversion. These bacteria use varying combinations of CAZymes that vary in complexity from a single catalytic domain to large multi-modular and multi-functional architectures to deconstruct biomass. Since the discovery of CelA from Caldicellulosiruptor bescii which was identified as one of the most active cellulase so far identified, the search for efficient multi-modular and multi-functional CAZymes has intensified. One of these candidates, GuxA (previously Acel_0615), was recently shown to exhibit synergy with other CAZymes in C. bescii, leading to a dramatic increase in growth on biomass when expressed in this host. GuxA is a multi-modular and multi-functional enzyme from Acidothermus cellulolyticus whose catalytic domains include a xylanase/endoglucanase GH12 and an exoglucanase GH6, representing a unique combination of these two glycoside hydrolase families in a single CAZyme. These attributes make GuxA of particular interest as a potential candidate for thermophilic industrial enzyme preparations. Here, we present a more complete characterization of GuxA to understand the mechanism of its activity and substrate specificity. In addition, we demonstrate that GuxA exhibits high levels of synergism with E1, a companion endoglucanase from A. cellulolyticus. We also present a crystal structure of one of the GuxA domains and dissect the structural features that might contribute to its thermotolerance.


  • Organizational Affiliation

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


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Glycoside hydrolase, family 6A [auth AAA]244Acidothermus cellulolyticusMutation(s): 0 
Gene Names: Acel_0615
UniProt
Find proteins for A0LSH8 (Acidothermus cellulolyticus (strain ATCC 43068 / DSM 8971 / 11B))
Explore A0LSH8 
Go to UniProtKB:  A0LSH8
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA0LSH8
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 6 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
GOL
Query on GOL

Download Ideal Coordinates CCD File 
I [auth AAA]GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
ZN
Query on ZN

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C [auth AAA],
D [auth AAA],
E [auth AAA],
F [auth AAA]
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
EDO
Query on EDO

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K [auth AAA]
L [auth AAA]
M [auth AAA]
N [auth AAA]
O [auth AAA]
K [auth AAA],
L [auth AAA],
M [auth AAA],
N [auth AAA],
O [auth AAA],
P [auth AAA]
1,2-ETHANEDIOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
ACT
Query on ACT

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G [auth AAA]ACETATE ION
C2 H3 O2
QTBSBXVTEAMEQO-UHFFFAOYSA-M
CL
Query on CL

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J [auth AAA],
T [auth AAA]
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
NA
Query on NA

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B [auth AAA],
H [auth AAA],
Q [auth AAA],
R [auth AAA],
S [auth AAA]
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.50 Å
  • R-Value Free: 0.171 
  • R-Value Work: 0.129 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 66.182α = 90
b = 66.182β = 90
c = 127.893γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
PROTEUM PLUSdata reduction
PROTEUM PLUSdata scaling
MOLREPphasing

Structure Validation

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Entry History & Funding Information

Deposition Data

  • Released Date: 2022-05-04 
  • Deposition Author(s): Lunin, V.V.

Funding OrganizationLocationGrant Number
Department of Energy (DOE, United States)United StatesFunding provided by the BioEnergy Science Center (BESC) and the Center for Bioenergy Innovation (CBI), from the U.S. Department of Energy Bioenergy Research Centers supported by the Office of Biological and Environmental Research in the DOE Office of Science

Revision History  (Full details and data files)

  • Version 1.0: 2022-05-04
    Type: Initial release
  • Version 1.1: 2022-06-22
    Changes: Database references
  • Version 1.2: 2023-10-18
    Changes: Data collection, Refinement description
  • Version 1.3: 2024-10-16
    Changes: Structure summary