4OOU image
Deposition Date 2014-02-04
Release Date 2014-08-06
Last Version Date 2024-10-30
Entry Detail
PDB ID:
4OOU
Keywords:
HYDROLASE
Title:
Crystal structure of beta-1,4-D-mannanase from Cryptopygus antarcticus
Biological Source:
Source Organism:
Cryptopygus antarcticus (Taxon ID: 187623)
Host Organism:
Escherichia coli
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
2.36 Å
R-Value Free:
0.24
R-Value Work:
0.19
R-Value Observed:
0.19
Space Group:
P 21 21 21
4OOU validation report
Macromolecular Entities
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Beta-1,4-mannanase
Chain IDs:A (auth: B), B (auth: A)
Chain Length:388
Number of Molecules:2
Biological Source:Cryptopygus antarcticus
UniProt ID:B4XC07 EC:3.2.1.78
Ligand Molecules
TRS
Primary Citation
Structure-based investigation into the functional roles of the extended loop and substrate-recognition sites in an endo-beta-1,4-d-mannanase from the Antarctic springtail, Cryptopygus antarcticus.
Proteins 82 3217 3223 (2014)
PMID: 25082572 DOI: 10.1002/prot.24655

Abstact

Endo-β-1,4-D-mannanase from the Antarctic springtail, Cryptopygus antarcticus (CaMan), is a cold-adapted β-mannanase that has the lowest optimum temperature (30°C) of all known β-mannanases. Here, we report the apo- and mannopentaose (M5) complex structures of CaMan. Structural comparison of CaMan with other β-mannanases from the multicellular animals reveals that CaMan has an extended loop that alters topography of the active site. Structural and mutational analyses suggest that this extended loop is linked to the cold-adapted enzymatic activity. From the CaMan-M5 complex structure, we defined the mannose-recognition subsites and observed unreported M5 binding site on the surface of CaMan.

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Primary Citation of related structures
4OOZ