5N0F image
Entry Detail
PDB ID:
5N0F
Keywords:
HYDROLASE
Title:
The catalytic domain, BcGH76, of Bacillus circulans Aman6 in complex with 1,6-ManSIFG
Biological Source:
Source Organism:
Bacillus circulans
Host Organism:
Escherichia coli BL21(DE3)
PDB Version:
Deposition Date:
2017-02-02
Release Date:
2017-08-09
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
1.69 Å
R-Value Free:
0.21
R-Value Work:
0.15
R-Value Observed:
0.15
Space Group:
P 21 21 21
5N0F validation report
Macromolecular Entities
Protein Blast
Polymer Type:polypeptide(L)
Description:Alpha-1,6-mannanase
Mutations:R341Q
Chain IDs:A, B
Chain Length:362
Number of Molecules:2
Biological Source:Bacillus circulans
UniProt ID:Q9Z4P9 Pfam ID:PF03663 EC:3.2.1.101
Ligand Molecules
7K2
Primary Citation
An atypical interaction explains the high-affinity of a non-hydrolyzable S-linked 1,6-alpha-mannanase inhibitor.
Chem. Commun. (Camb.) 53 9238 9241 (2017)
PMID: 28766587 DOI: 10.1039/c7cc04977c

Abstact

The non-hydrolyzable S-linked azasugars, 1,6-α-mannosylthio- and 1,6-α-mannobiosylthioisofagomine, were synthesized and shown to bind with high affinity to a family 76 endo-1,6-α-mannanase from Bacillus circulans. X-ray crystallography showed an atypical interaction of the isofagomine nitrogen with the catalytic acid/base. Molecular dynamics simulations reveal that the atypical binding results from sulfur perturbing the most stable form away from the nucleophile interaction preferred for the O-linked congener.

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Primary Citation of related structures
5N0F