4G1C image
Entry Detail
PDB ID:
4G1C
Keywords:
Title:
Human SIRT5 bound to Succ-IDH2 and Carba-NAD
Biological Source:
Source Organism:
Host Organism:
PDB Version:
Deposition Date:
2012-07-10
Release Date:
2012-08-15
Method Details:
Experimental Method:
Resolution:
1.94 Å
R-Value Free:
0.24
R-Value Work:
0.19
R-Value Observed:
0.19
Space Group:
P 21 21 21
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:NAD-dependent protein deacylase sirtuin-5, mitochondrial
Chain IDs:A, B
Chain Length:267
Number of Molecules:2
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Description:Succinylated IDH2 peptide
Chain IDs:C (auth: D), D (auth: E)
Chain Length:7
Number of Molecules:2
Biological Source:
Modified Residue
Compound ID Chain ID Parent Comp ID Details 2D Image
SLL C LYS ?
Primary Citation
Synthesis of Carba-NAD and the Structures of Its Ternary Complexes with SIRT3 and SIRT5.
J.Org.Chem. 77 7319 7329 (2012)
PMID: 22849721 DOI: 10.1021/jo301067e

Abstact

Carba-NAD is a synthetic compound identical to NAD except for one substitution, where an oxygen atom adjacent to the anomeric linkage bearing nicotinamide is replaced with a methylene group. Because it is inert in nicotinamide displacement reactions, carba-NAD is an unreactive substrate analogue for NAD-consuming enzymes. SIRT3 and SIRT5 are NAD-consuming enzymes that are potential therapeutic targets for the treatment of metabolic diseases and cancers. We report an improved carba-NAD synthesis, including a pyrophosphate coupling method that proceeds in approximately 60% yield. We also disclose the X-ray crystal structures of the ternary complexes of SIRT3 and SIRT5 bound to a peptide substrate and carba-NAD. These X-ray crystal structures provide critical snapshots of the mechanism by which human sirtuins function as protein deacylation catalysts.

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Primary Citation of related structures