ISDA: 4J0L

Deposition Date 2013-01-31

Release Date 2013-10-16

Last Version Date 2024-10-30

Entry Detail

PDB ID:

4J0L

Keywords:

HYDROLASE

Title:

Crystal Structure of a Family GH19 Chitinase (W72A/E67Q mutant) from rye seeds in complex with two (GlcNAc)4 molecules

Biological Source:

Source Organism(s):

Secale cereale (Taxon ID: 4550)

Expression System(s):

Escherichia coli

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

1.90 Å

R-Value Free:

0.20

R-Value Work:

0.18

R-Value Observed:

0.18

Space Group:

P 43 21 2

Download Validation Report

Macromolecular Entities

Structures with similar UniProt ID

Protein Blast

Polymer Type:polypeptide(L)
Molecule:Basic endochitinase C
Gene (Uniprot):rscc
Mutagens:W72A/E67Q
Chain IDs:A
Chain Length:244
Number of Molecules:1
Biological Source:Secale cereale

UniProt ID:Q9FRV0 Pfam ID:PF00182

Ligand Molecules

EDO

SO4

Primary Citation

Complete subsite mapping of a "loopful" GH19 chitinase from rye seeds based on its crystal structure

Ohnuma, T, Umemoto, N, Kondo, K, Numata, T, Fukamizo, T.Show

Febs Lett. 587 2691 2697 (2013)

PMID: 23871710 DOI: 10.1016/j.febslet.2013.07.008

Abstact

Crystallographic analysis of a mutated form of "loopful" GH19 chitinase from rye seeds a double mutant RSC-c, in which Glu67 and Trp72 are mutated to glutamine and alanine, respectively, (RSC-c-E67Q/W72A) in complex with chitin tetrasaccharide (GlcNAc)₄ revealed that the entire substrate-binding cleft was completely occupied with the sugar residues of two (GlcNAc)₄ molecules. One (GlcNAc)₄ molecule bound to subsites -4 to -1, while the other bound to subsites +1 to +4. Comparisons of the main chain conformation between liganded RSC-c-E67Q/W72A and unliganded wild type RSC-c suggested domain motion essential for catalysis. This is the first report on the complete subsite mapping of GH19 chitinase.

Legend

Protein

Chemical

Disease

Primary Citation of related structures

Abstact

Feedback Form