ISDA

Deposition Date 1997-11-28

Release Date 1998-02-25

Last Version Date 2024-11-20

Entry Detail

PDB ID:

1GSP

Keywords:

ENDORIBONUCLEASE

Title:

RIBONUCLEASE T1 COMPLEXED WITH 2',3'-CGPS, 1 DAY

Biological Source:

Source Organism:

Aspergillus oryzae (Taxon ID: 5062)

Host Organism:

Escherichia coli

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.20 Å

R-Value Free:

0.20

R-Value Work:

0.15

R-Value Observed:

0.15

Space Group:

P 21 21 21

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Molecule:RIBONUCLEASE T1
Gene (Uniprot):rntA
Chain IDs:A
Chain Length:104
Number of Molecules:1
Biological Source:Aspergillus oryzae

UniProt ID:P00651 Pfam ID:PF00545 EC:4.6.1.24

Ligand Molecules

SGP

Primary Citation

Hydrolysis of a slow cyclic thiophosphate substrate of RNase T1 analyzed by time-resolved crystallography.

Zegers, I, Loris, R, Dehollander, G, Fattah Haikal, A, Poortmans, F, Steyaert, J, Wyns, L.Show

Nat.Struct.Biol. 5 280 283 (1998)

PMID: 9546218 DOI: 10.1038/nsb0498-280

Abstact

Here we present a time-resolved crystallographic analysis of the hydrolysis of exo (Sp) guanosine 2',3'-cyclophosphorothioate by RNase T1. The use of a slow substrate and fast crystallization methods made it possible to perform the study with conventional data-collection techniques. The results support the idea that the hydrolysis reaction proceeds through a mechanism that is the inverse of the transesterification reaction. In addition, the structures provide an explanation for the differential behavior of RNase T1 towards exo- and endo-cyclic thiophosphates.

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Primary Citation of related structures