ISDA

Deposition Date 2000-01-28

Release Date 2000-02-18

Last Version Date 2024-10-16

Entry Detail

PDB ID:

1EDQ

Keywords:

HYDROLASE

Title:

CRYSTAL STRUCTURE OF CHITINASE A FROM S. MARCESCENS AT 1.55 ANGSTROMS

Biological Source:

Source Organism:

Serratia marcescens (Taxon ID: 615)

Host Organism:

Escherichia coli

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

1.55 Å

R-Value Free:

0.21

R-Value Work:

0.18

R-Value Observed:

0.18

Space Group:

C 2 2 21

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Molecule:CHITINASE A
Gene (Uniprot):chiA
Chain IDs:A
Chain Length:540
Number of Molecules:1
Biological Source:Serratia marcescens

UniProt ID:O83008 Pfam ID:PF08329, PF00704 EC:3.2.1.201

Primary Citation

De novo purification scheme and crystallization conditions yield high-resolution structures of chitinase A and its complex with the inhibitor allosamidin.

Papanikolau, Y, Tavlas, G, Vorgias, C.E, Petratos, K, Perrakis, A, Tews, I, Dauter, Z, Oppenheim, A.B, Chet, I, Wilson, K.S, Vorgias, C.E, PAPANIKOLAU, Y, PRAG, G, TAVLAS, G, VORGIAS, C.E, OPPENHEIM, A.B, PETRATOS, K.Show

Acta Crystallogr.,Sect.D 59 400 403 (2003)

PMID: 12554965 DOI: 10.1107/S0907444902021923

Abstact

The purification scheme of chitinase A (ChiA) from S. marcescens has been extensively revised. The pure enzyme crystallizes readily under new crystallization conditions. The ChiA crystal structure has been refined to 1.55 A resolution and the crystal structure of ChiA co-crystallized with the inhibitor allosamidin has been refined to 1.9 A resolution. Allosamidin is located in the deep active-site tunnel of ChiA and interacts with three important residues: Glu315, the proton donor of the catalysis, Asp313, which adopts two conformations in the native structure but is oriented towards Glu315 in the inhibitor complex, and Tyr390, which lies opposite Glu315 in the active-site tunnel.

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Primary Citation of related structures