ISDA

Deposition Date 2001-11-03

Release Date 2002-10-31

Last Version Date 2024-10-23

Entry Detail

PDB ID:

1GPF

Keywords:

HYDROLASE

Title:

CHITINASE B FROM SERRATIA MARCESCENS IN COMPLEX WITH INHIBITOR PSAMMAPLIN

Biological Source:

Source Organism:

SERRATIA MARCESCENS (Taxon ID: 615)

Host Organism:

ESCHERICHIA COLI

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

1.85 Å

R-Value Free:

0.24

R-Value Work:

0.20

R-Value Observed:

0.20

Space Group:

P 21 21 21

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Molecule:CHITINASE B
Gene (Uniprot):chiB
Chain IDs:A, B
Chain Length:499
Number of Molecules:2
Biological Source:SERRATIA MARCESCENS

UniProt ID:Q54276 Pfam ID:PF00704 EC:3.2.1.14

Ligand Molecules

SO4

Primary Citation

Psammaplin A, a Chitinase Inhibitor Isolated from the Fijian Marine Sponge Aplysinella Rhax

Tabudravu, J.N, Eijsink, V.G, Gooday, G.W, Jaspars, M, Komander, D, Legg, M, Synstad, B, Van Aalten, D.M.Show

Bioorg.Med.Chem. 10 1123 ? (2002)

PMID: 11836123 DOI: 10.1016/S0968-0896(01)00372-8

Abstact

Several brominated tyrosine derived compounds, psammaplins A (1), K (2) and L (3) as well as bisaprasin (4) were isolated from the Fijian marine sponge Aplysinella rhax during a bioassay guided isolation protocol. Their structures were determined using NMR and MS techniques. Psammaplin A was found to moderately inhibit chitinase B from Serratia marcescens, the mode of inhibition being non-competitive. Crystallographic studies suggest that a disordered psammaplin A molecule is bound near the active site. Interestingly, psammaplin A was found to be a potent antifungal agent.

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Primary Citation of related structures