3SIL

SIALIDASE FROM SALMONELLA TYPHIMURIUM

• PDB DOI: https://doi.org/10.2210/pdb3SIL/pdb

• Classification: GLYCOSIDASE
• Organism(s): Salmonella enterica subsp. enterica serovar Typhimurium str. LT2
• Expression System: Escherichia coli
• Mutation(s): Yes 


• Deposited: 1998-07-07 Released: 1998-11-11 
• Deposition Author(s): Garman, E.F., Sheldrick, G.M.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.05 Å
• R-Value Free: 0.147 
• R-Value Observed: 0.116 

Literature

An Enzyme at Atomic Resolution: The 1.05 A Structure of Salmonella Typhimurium Neuraminidase (Sialidase)

Garman, E.F., Wouters, J., Schneider, T.R., Vimr, E.R., Laver, W.G., Sheldrick, G.M.

To be published.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 42.48 kDa 
• Atom Count: 3,703 
• Modelled Residue Count: 379 
• Deposited Residue Count: 379 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
SIALIDASE	A	379	Salmonella enterica subsp. enterica serovar Typhimurium str. LT2	Mutation(s): 1  Gene Names: NANH EC: 3.2.1.18
UniProt
Find proteins for P29768 (Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720)) Explore P29768  Go to UniProtKB:  P29768

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
PO4	C [auth A]	PHOSPHATE ION O4 P NBIIXXVUZAFLBC-UHFFFAOYSA-K
GOL	D [auth A], E [auth A], F [auth A], G [auth A], H [auth A], I [auth A]	GLYCEROL C3 H8 O3 PEDCQBHIVMGVHV-UHFFFAOYSA-N
K	B [auth A]	POTASSIUM ION K NPYPAHLBTDXSSS-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.05 Å
• R-Value Free: 0.147 
• R-Value Observed: 0.116 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 47.1	α = 90
b = 81.73	β = 90
c = 91.5	γ = 90

Software Package:

Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
SHELXL-97	refinement

Structure Validation

Entry History 

Deposition Data

• Released Date: 1998-11-11 
Deposition Author(s): Garman, E.F., Sheldrick, G.M.

Revision History  

• Version 1.0: 1998-11-11
  Type: Initial release
  
• Version 1.1: 2008-03-25
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Source and taxonomy, Version format compliance
• Version 1.3: 2021-11-03
  Changes: Data collection, Database references, Derived calculations
• Version 1.4: 2023-08-09
  Changes: Refinement description