7R1L

Clostridium thermocellum CtCBM50 structure in complex with beta-1,4-GlcNAc trisaccharide

• PDB DOI: https://doi.org/10.2210/pdb7R1L/pdb

• Classification: SUGAR BINDING PROTEIN
• Organism(s): Acetivibrio thermocellus
• Expression System: Escherichia coli BL21
• Mutation(s): No 


• Deposited: 2022-02-03 Released: 2023-02-15 
• Deposition Author(s): Ribeiro, D.O., Costa, R., Palma, A.S., Carvalho, A.L.
• Funding Organization(s): Fundacao para a Ciencia e a Tecnologia

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.45 Å
• R-Value Free: 0.201 
• R-Value Work: 0.176 
• R-Value Observed: 0.177 

Starting Model: experimental

Literature

Unravelling Clostridium thermocellum LysM domains: a molecular view on the cooperative recognition of chitin and peptidoglycan

Ribeiro, D.O., Palma, A.S.

To be published.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Homo 3-mer - A3 Local Symmetry: Cyclic - C2  (Explore in 3D)
Local Stoichiometry: Homo 2-mer - A2 

Local Symmetry: Cyclic - C2  (Explore in 3D)
Local Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: isothermal titration calorimetry

Macromolecule Content

• Total Structure Weight: 20.11 kDa 
• Atom Count: 1,285 
• Modelled Residue Count: 139 
• Deposited Residue Count: 168 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Spore coat assembly protein SafA	A, B, C	56	Acetivibrio thermocellus	Mutation(s): 0  Gene Names: Cthe_0300
UniProt
Find proteins for A3DC59 (Acetivibrio thermocellus (strain ATCC 27405 / DSM 1237 / JCM 9322 / NBRC 103400 / NCIMB 10682 / NRRL B-4536 / VPI 7372)) Explore A3DC59  Go to UniProtKB:  A3DC59

Oligosaccharides

Help

Entity ID: 2
Molecule	Chains	Length	2D Diagram	Glycosylation	3D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose	D	3		N/A
Glycosylation Resources
GlyTouCan:  G47362BJ GlyCosmos:  G47362BJ GlyGen:  G47362BJ

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
ACT	E [auth C]	ACETATE ION C2 H3 O2 QTBSBXVTEAMEQO-UHFFFAOYSA-M

Biologically Interesting Molecules (External Reference) 1 Unique

Entity ID: 2
ID	Chains	Name	Type/Class	2D Diagram	3D Interactions
PRD_900017	D	triacetyl-beta-chitotriose	Oligosaccharide / Inhibitor

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.45 Å
• R-Value Free: 0.201 
• R-Value Work: 0.176 
• R-Value Observed: 0.177 
• Space Group: C 1 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 99.39	α = 90
b = 41.77	β = 96.9
c = 42.87	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
PDB_EXTRACT	data extraction
MOSFLM	data reduction
SCALA	data scaling
PHASER	phasing

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2023-02-15 
Deposition Author(s): Ribeiro, D.O., Costa, R., Palma, A.S., Carvalho, A.L.

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Funding Organization	Location	Grant Number
Fundacao para a Ciencia e a Tecnologia	Portugal	--

Revision History  

• Version 1.0: 2023-02-15
  Type: Initial release
  
• Version 1.1: 2024-02-07
  Changes: Data collection, Refinement description