5MQS

Sialidase BT_1020

• PDB DOI: https://doi.org/10.2210/pdb5MQS/pdb

• Classification: HYDROLASE
• Organism(s): Bacteroides thetaiotaomicron
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2016-12-20 Released: 2017-03-22 
• Deposition Author(s): Basle, A., Ndeh, D., Rogowski, A., Cartmell, A., Luis, A.S., Venditto, I., Labourel, A., Gilbert, H.J.
• Funding Organization(s): iotechnology and Biological Research Council, Wellcome Trust, European Research Council

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 3.00 Å
• R-Value Free: 0.262 
• R-Value Work: 0.207 
• R-Value Observed: 0.210 

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 127.75 kDa 
• Atom Count: 8,806 
• Modelled Residue Count: 1,082 
• Deposited Residue Count: 1,108 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Beta-L-arabinobiosidase	A	1,108	Bacteroides thetaiotaomicron	Mutation(s): 0  Gene Names: hypBA2, Btheta7330_02635 EC: 3.2.1.187
UniProt
Find proteins for Q8A8Z7 (Bacteroides thetaiotaomicron (strain ATCC 29148 / DSM 2079 / JCM 5827 / CCUG 10774 / NCTC 10582 / VPI-5482 / E50)) Explore Q8A8Z7  Go to UniProtKB:  Q8A8Z7

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
AHR	B [auth A]	alpha-L-arabinofuranose C5 H10 O5 HMFHBZSHGGEWLO-QMKXCQHVSA-N
CA	D [auth A]	CALCIUM ION Ca BHPQYMZQTOCNFJ-UHFFFAOYSA-N
NA	C [auth A]	SODIUM ION Na FKNQFGJONOIPTF-UHFFFAOYSA-N

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
PTR	A	L-PEPTIDE LINKING	C9 H12 N O6 P		TYR

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 3.00 Å
• R-Value Free: 0.262 
• R-Value Work: 0.207 
• R-Value Observed: 0.210 
• Space Group: C 2 2 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 126.433	α = 90
b = 318.194	β = 90
c = 90.579	γ = 90

Software Package:

Software Name	Purpose
XDS	data reduction
Aimless	data scaling
MOLREP	phasing
Coot	model building
REFMAC	refinement

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2017-03-22 
Deposition Author(s): Basle, A., Ndeh, D., Rogowski, A., Cartmell, A., Luis, A.S., Venditto, I., Labourel, A., Gilbert, H.J.

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Funding Organization	Location	Grant Number
iotechnology and Biological Research Council	United Kingdom	BB/K020358/1
iotechnology and Biological Research Council	United Kingdom	BB/K001949/1
Wellcome Trust	United Kingdom	WT097907MA
European Research Council	United Kingdom	322820

Revision History  

• Version 1.0: 2017-03-22
  Type: Initial release
  
• Version 1.1: 2017-04-05
  Changes: Database references
• Version 1.2: 2017-04-12
  Changes: Database references
• Version 1.3: 2017-08-23
  Changes: Author supporting evidence
• Version 2.0: 2020-07-29
  Type: Remediation
  Reason: Carbohydrate remediation
  Changes: Atomic model, Data collection, Derived calculations, Structure summary