Biological Assembly 1  

 3D View: Structure

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Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 93582.45 
• Atom Count: 6468 
• Residue Count: 872 
• Unique protein chains: 1

1XYF

ENDO-1,4-BETA-XYLANASE FROM STREPTOMYCES OLIVACEOVIRIDIS

• DOI: 10.2210/pdb1XYF/pdb

• Classification: HYDROLASE
• Organism(s): Streptomyces olivaceoviridis


• Deposited: 1999-05-11 Released: 2000-05-10 
• Deposition Author(s): Fujimoto, Z., Mizuno, H., Kuno, A., Kusakabe, I.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.9 Å
• R-Value Free: 0.235 
• R-Value Work: 0.197 

Literature

Crystal structure of Streptomyces olivaceoviridis E-86 beta-xylanase containing xylan-binding domain.

Fujimoto, Z., Kuno, A., Kaneko, S., Yoshida, S., Kobayashi, H., Kusakabe, I., Mizuno, H.

(2000) J.Mol.Biol. 300: 575-585

• PubMed: 10884353 
• DOI: 10.1006/jmbi.2000.3877
• Also Cited By: 2D24, 2D23, 2D22, 2D20, 2D1Z


• PubMed Abstract: 
  

Xylanases hydrolyse the beta-1,4-glycosidic bonds within the xylan backbone and belong to either family 10 or 11 of the glycoside hydrolases, on the basis of the amino acid sequence similarities of their catalytic domains. Generally, xylanases have a core catalytic domain, an N and/or C-terminal substrate-binding domain and a linker region. Until now, X-ray structural analyses of family 10 xylanases have been reported only for their catalytic domains and do not contain substrate-binding domains. We have determined the crystal structure of a family 10 xylanase containing the xylan-binding domain (XBD) from Streptomyces olivaceoviridis E-86 at 1.9 A resolution. The catalytic domain comprises a (beta/alpha)(8)-barrel topologically identical to other family 10 xylanases. XBD has three similar subdomains, as suggested from a triple-repeat sequence, which are assembled against one another around a pseudo-3-fold axis, forming a galactose-binding lectin fold similar to ricin B-chain. The Gly/Pro-rich linker region connecting the catalytic domain and XBD is not visible in the electron density map, probably because of its flexibility. The interface of the two domains in the crystal is hydrophilic, where five direct hydrogen bonds and water-mediated hydrogen bonds exist. The sugar-binding residues seen in ricin/lactose complex are spatially conserved among the three subdomains in XBD, suggesting that all of the subdomains in XBD have the capacity to bind sugars. The flexible linker region enables the two domains to move independently and may provide a triple chance of substrate capturing and catalysis. The structure reported here represents an example where the metabolic enzyme uses a ricin-type lectin motif for capturing the insoluble substrate and promoting catalysis.

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Related Citations: 

• Crystallization and Preliminary X-Ray Crystallographic Study of Streptomyces olivaceoviridis E-86 Xylanase
  Fujimoto, Z.,Mizuno, H.,Kuno, A.,Yoshida, S.,Kobayashi, H.,Kusakabe, I.
  (1997) J.Biochem.(Tokyo) 121: 826




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Organizational Affiliation: 

Department of Biotechnology, National Institute of Agrobiological Resources, Tsukuba, IIbaraki, 305-8602, Japan. [e-mail]

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
ENDO-1,4-BETA-XYLANASE	A, B	436	Streptomyces olivaceoviridis	Mutation(s): 0  EC: 3.2.1.8
Find proteins for Q7SI98 (Streptomyces olivaceoviridis) Go to UniProtKB:  Q7SI98

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.9 Å
• R-Value Free: 0.235 
• R-Value Work: 0.197 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length (Å)	Angle (°)
a = 79.770	α = 90.00
b = 95.010	β = 90.00
c = 141.060	γ = 90.00

Software Package:

Software Name	Purpose
AMoRE	phasing
X-PLOR	refinement
DENZO	data reduction
SCALEPACK	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1999-05-11 
• Released Date: 2000-05-10 
• Deposition Author(s): Fujimoto, Z., Mizuno, H., Kuno, A., Kusakabe, I.

Revision History 

• Version 1.0: 2000-05-10
  Type: Initial release
• Version 1.1: 2007-10-16
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Version format compliance