ISDA

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:

Enterobacteria phage K1F (Taxon ID: 344021)

Host Organism:

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

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Macromolecular Entities

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:PF12218, PF12217, PF12195, PF12219 EC:3.2.1.129

Ligand Molecules

SLB

Primary Citation

Structure analysis of endosialidase NF at 0.98 A resolution.

Schulz, E.C, Neumann, P, Gerardy-Schahn, R, Sheldrick, G.M, Ficner, R.Show

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.

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Primary Citation of related structures