9EQQ | pdb_00009eqq

Uhgb_MS mannoside synthase from an unknown human gut bacterium in complex with Mannose

• PDB DOI: https://doi.org/10.2210/pdb9EQQ/pdb

• Classification: CARBOHYDRATE
• Organism(s): metagenome
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2024-03-22 Released: 2025-10-08 
• Deposition Author(s): Cioci, G., Ladeveze, S., Potocki-Veronese, G.
• Funding Organization(s): Not funded

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.55 Å
• R-Value Free: 
  0.207 (Depositor), 0.208 (DCC) 
• R-Value Work: 
  0.179 (Depositor), 0.187 (DCC) 

Starting Model: in silico

Literature

Structure-function studies of novel bacterial mannoside synthase

Cioci, G., Ladeveze, S.

To be published.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: gel filtration

Macromolecule Content 

• Total Structure Weight: 39.42 kDa 
• Atom Count: 2,909 
• Modeled Residue Count: 347 
• Deposited Residue Count: 350 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Uhgb_MS mannoside synthase from an unknown human gut bacterium	A	350	metagenome	Mutation(s): 0
UniProt
Find proteins for F0QZL2 (Phocaeicola salanitronis (strain DSM 18170 / JCM 13657 / CCUG 60908 / BL78)) Explore F0QZL2  Go to UniProtKB:  F0QZL2

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
MAN (Subject of Investigation/LOI)	B [auth A]	alpha-D-mannopyranose C6 H12 O6 WQZGKKKJIJFFOK-PQMKYFCFSA-N
EDO	C [auth A]	1,2-ETHANEDIOL C2 H6 O2 LYCAIKOWRPUZTN-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.55 Å
• R-Value Free:  0.207 (Depositor), 0.208 (DCC) 
• R-Value Work:  0.179 (Depositor), 0.187 (DCC) 

Space Group: P 6₁ 2 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 176.629	α = 90
b = 176.629	β = 90
c = 83.539	γ = 120

Software Package:

Software Name	Purpose
REFMAC	refinement
XDS	data reduction
XDS	data scaling
MOLREP	phasing

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2025-10-08 
Deposition Author(s): Cioci, G., Ladeveze, S., Potocki-Veronese, G.

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Funding Organization	Location	Grant Number
Not funded		--

Revision History  

• Version 1.0: 2025-10-08
  Type: Initial release