9ERH | pdb_00009erh

Uhgb_MS mannoside synthase from an unknown human gut bacterium in complex with 1,2-beta-mannobiose

• PDB DOI: https://doi.org/10.2210/pdb9ERH/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: 2.65 Å
• R-Value Free: 
  0.182 (Depositor), 0.191 (DCC) 
• R-Value Work: 
  0.169 (Depositor), 0.181 (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: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: gel filtration

Macromolecule Content 

• Total Structure Weight: 81.38 kDa 
• Atom Count: 5,533 
• Modeled Residue Count: 694 
• Deposited Residue Count: 716 
• 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 in complex with 1,2-beta-mannobiose	A, B	358	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

Oligosaccharides

Help

Entity ID: 2
Molecule	Chains	Length	2D Diagram	Glycosylation	3D Interactions
beta-D-mannopyranose-(1-2)-alpha-D-mannopyranose	C [auth F], D	2		N/A
Glycosylation Resources
GlyTouCan:  G08254PX GlyCosmos:  G08254PX GlyGen:  G08254PX

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
SO4 (Subject of Investigation/LOI)	E [auth A], F [auth B]	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.65 Å
• R-Value Free:  0.182 (Depositor), 0.191 (DCC) 
• R-Value Work:  0.169 (Depositor), 0.181 (DCC) 

Space Group: P 6₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 178.183	α = 90
b = 178.183	β = 90
c = 83.675	γ = 120

Software Package:

Software Name	Purpose
REFMAC	refinement
XDS	data reduction
XDS	data scaling
PHASER	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