Linked Life Data

21449607

Source:http://linkedlifedata.com/resource/pubmed/id/21449607

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
16
pubmed:dateCreated
2011-4-19
pubmed:abstractText
The HIV-1 accessory protein Nef is N-terminally myristoylated, and this post-translational modification is essential for Nef function in AIDS progression. Transfer of a myristate group from myristoyl coenzyme A to Nef occurs cotranslationally and is catalyzed by human N-myristoyltransferase 1 (NMT). To investigate the conformational effects of myristoylation on Nef structure as well as to probe the nature of the Nef:NMT complex, we investigated various forms of Nef with hydrogen exchange mass spectrometry. Conformational changes in Nef were not detected as a result of myristoylation, and NMT had no effect on deuterium uptake by Nef in a myrNef:NMT complex. However, myrNef binding did have an effect on NMT deuterium uptake. Major HX differences in NMT were primarily located around the active site, with more subtle differences, at the longer time points, across the structure. At the shortest time point, significant differences between the two states were observed in two regions which interact strongly with the phosphate groups of coenzyme A. On the basis of our results, we propose a model of the Nef:NMT complex in which only the myristoyl moiety holds the two proteins together in complex and speculate that perhaps NMT chaperones Nef to the membrane and thereby protects the myristic acid group from the cytosol rather than Nef operating through a myristoyl switch mechanism.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Apr
pubmed:issn
1520-4995
pubmed:author
pubmed:issnType
Electronic
pubmed:day
26
pubmed:volume
50
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
3394-403
pubmed:dateRevised
2011-8-1
pubmed:meshHeading
pubmed:year
2011
pubmed:articleTitle
Effects of HIV-1 Nef on human N-myristoyltransferase 1.
pubmed:affiliation
Department of Chemistry & Chemical Biology and The Barnett Institute of Chemical & Biological Analysis, Northeastern University, Boston, Massachusetts 02115, United States.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't, Research Support, N.I.H., Extramural