ISDA

Entry Detail

PDB ID:

1A26

Keywords:

TRANSFERASE

Title:

THE CATALYTIC FRAGMENT OF POLY(ADP-RIBOSE) POLYMERASE COMPLEXED WITH CARBA-NAD

Biological Source:

Source Organism:

Gallus gallus

Host Organism:

Spodoptera frugiperda

PDB Version:

Deposition Date:

1998-01-16

Release Date:

1998-05-27

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.25 Å

R-Value Free:

0.23

R-Value Work:

0.16

R-Value Observed:

0.16

Space Group:

P 21 21 21

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Description:POLY (ADP-RIBOSE) POLYMERASE
Chain IDs:A
Chain Length:361
Number of Molecules:1
Biological Source:Gallus gallus

UniProt ID:P26446 Pfam ID:PF02877, PF00644

Ligand Molecules

CNA

Primary Citation

The mechanism of the elongation and branching reaction of poly(ADP-ribose) polymerase as derived from crystal structures and mutagenesis.

Ruf, A, Rolli, V, de Murcia, G, Schulz, G.E, Ruf, A, Mennissier De Murcia, J, De Murcia, G.M, Schulz, G.E, Jung, S, Miranda, E.A, De Murcia, J.M, Niedergang, C, Delarue, M, Schulz, G.E, De Murcia, G.M.Show

J.Mol.Biol. 278 57 65 (1998)

PMID: 9571033 DOI: 10.1006/jmbi.1998.1673

Abstact

The binding site for the acceptor substrate poly(ADP-ribose) in the elongation reaction of the ADP-ribosyl transferase poly(ADP-ribose) polymerase (PARP) was detected by cocrystallizing the enzyme with an NAD+ analogue. The site was confirmed by mutagenesis studies. In conjunction with the binding site of the donor NAD+, the bound acceptor reveals the geometry of the elongation reaction. It shows in particular that the strictly conserved glutamate residue of all ADP-ribosylating enzymes (Glu988 of PARP) facilitates the reaction by polarizing both, donor and acceptor. Moreover, the binding properties of the acceptor site suggest a mechanism for the branching reaction, that also explains the dual specificity of this transferase for elongation and branching, which is unique among polymer-forming enzymes.

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Primary Citation of related structures