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3JU4 image
Deposition Date 2009-09-14
Release Date 2010-02-02
Last Version Date 2023-11-01
Entry Detail
PDB ID:
3JU4
Keywords:
HYDROLASE
Title:
Crystal Structure Analysis of EndosialidaseNF at 0.98 A Resolution
Biological Source:
Source Organism(s):
Enterobacteria phage K1F (Taxon ID: 344021)
Expression System(s):
Escherichia coli
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
0.98 Å
R-Value Free:
0.13
R-Value Work:
0.11
R-Value Observed:
0.11
Space Group:
H 3
3JU4 validation report
Macromolecular Entities
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Endo-N-acetylneuraminidase
Chain IDs:A
Chain Length:670
Number of Molecules:1
Biological Source:Enterobacteria phage K1F
UniProt ID:Q04830 Pfam ID:PF12195, PF12219, PF12217, PF12218 EC:3.2.1.129
Ligand Molecules
CL
NA
SLB
Primary Citation
Structure analysis of endosialidase NF at 0.98 A resolution.
Acta Crystallogr.,Sect.D 66 176 180 (2010)
PMID: 20124697 DOI: 10.1107/S0907444909048720

Abstact

Endosialidase NF (endoNF) is a bacteriophage-derived endosialidase that specifically degrades alpha-2,8-linked polysialic acid. The structure of a new crystal form of endoNF in complex with sialic acid has been refined at 0.98 A resolution. The 210 kDa homotrimeric multi-domain enzyme displays outstanding stability and resistance to SDS. Even at atomic resolution, only a minor fraction of side chains possess alternative conformations. However, multiple conformations of an active-site residue imply that it has an important catalytic function in the cleavage mechanism of polysialic acid.

Legend

Protein

Chemical

Disease

Primary Citation of related structures
1V0E
1V0F
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