Linked Life Data

19007119

Source:http://linkedlifedata.com/resource/pubmed/id/19007119

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
50
pubmed:dateCreated
2008-12-22
pubmed:abstractText
The peroxisome proliferator-activated receptor (PPAR-gamma) is a ligand-dependent transcription factor that is important in adipocyte differentiation and glucose homeostasis. This paper presents a detailed dynamics study of PPAR-gamma and its binding to the agonist rosiglitazone using both polarized and unpolarized force fields. The numerical result revealed the critical role of protein polarization in stabilizing the activation function-2 (AF-2) in ligand binding to PPAR-gamma and a helix structure (helix-2'). Specifically when nonpolarized force field is used, a critical H-bond in PPAR-gamma binding is broken, which caused AF-2 to adopt random structures. In addition, helix-2' is partially denatured during the MD simulation, due to the breaking of a backbone hydrogen bond. In contrast, when polarized force field is employed in MD simulation, the PPAR-gamma ligand binding structure is stabilized and the local structure of helix-2' remains folded, both being in excellent agreement with experimental observations. The current result demonstrates the importance of electronic polarization of protein in stabilizing hydrogen bonding, which is critical to preserving the native structure of local helices and protein-ligand binding in PPAR-gamma.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Dec
pubmed:issn
1520-5126
pubmed:author
pubmed:issnType
Electronic
pubmed:day
17
pubmed:volume
130
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
17129-33
pubmed:meshHeading
pubmed:year
2008
pubmed:articleTitle
Protein polarization is critical to stabilizing AF-2 and helix-2' domains in ligand binding to PPAR-gamma.
pubmed:affiliation
Institute of Theoretical and Computational Chemistry, Key Laboratory of Mesoscopic Chemistry of MOE, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't