Linked Life Data

18222422

Source:http://linkedlifedata.com/resource/pubmed/id/18222422

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
2008-2-4
pubmed:abstractText
Removal of the R peptide (residues 617-632) from the Moloney murine leukemia virus (MoMuLV) envelope protein (Env) cytoplasmic tail potentiates fusion. We examined the role of the membrane-proximal cytoplasmic domain (598-616) of the MoMuLV Env in the Env-mediated membrane fusion and incorporation. The Env truncated at 616 exhibits maximum fusogenicity in cell-to-cell fusion assay. By comparison, full tail Env (632) and the Env truncated to residue 601 mediated fusion at 40%. The Envs truncated to residues 598 or 595 are not fusogenic. Progressive cytoplasmic tail truncation correlated with decreased Env incorporation into virions. Substitution of the domain 598-616 with an amphiphilic alpha-helix from melittin results in maximally fusogenic Envs that efficiently incorporated into transduction competent virions. However, substitution of the domain 598-616 with random or hydrophilic sequences caused loss of the Env fusogenicity and titer while retaining incorporation. Further, a secondary structure prediction analysis of 27 unrelated Env cytoplasmic tails indicates a common (23/27) propensity for an amphiphilic alpha-helical domain at immediate proximity to the viral membrane. These results support the suggestion that viral fusion is enhanced by a membrane-proximal cytoplasmic amphiphilic alpha-helix in Env tail. The model of its action is proposed.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Feb
pubmed:issn
0014-4800
pubmed:author
pubmed:issnType
Print
pubmed:volume
84
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
18-30
pubmed:meshHeading
pubmed:year
2008
pubmed:articleTitle
Membrane-proximal cytoplasmic domain of Moloney murine leukemia virus envelope tail facilitates fusion.
pubmed:affiliation
San Diego Cancer Research Institute, 1200 Garden View, Suite 200, Encinitas, CA 92024, USA. YaninaAdler@cox.net
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't, Research Support, N.I.H., Extramural