Linked Life Data

11597743

Source:http://linkedlifedata.com/resource/pubmed/id/11597743

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1-2
pubmed:dateCreated
2001-10-12
pubmed:abstractText
Human tetraspanin CD81 is a putative receptor for hepatitis C virus (HCV), because it has been shown to bind 'bona fide' HCV particles. CD81, as all tetraspanins, spans the membrane four times forming two extracellular loops: a small (SEL) and a large one (LEL). We have shown previously that a recombinant form of LEL is sufficient for binding HCV through the major envelope glycoprotein E2. The role of SEL in the CD81-HCV interaction was questioned. We found that transfectants expressing LEL alone bind the recombinant HCV-E2 protein at much lower levels than cells expressing the wild type CD81. And therefore whether SEL contributes to the CD81-HCV interaction or whether it influences the expression of LEL was examined. We have found that in the absence of SEL, LEL is expressed at significantly reduced levels on the cell surface because it is retained intracellularly, while HCV-E2 still binds LEL. Our data suggest that SEL of CD81 does not mediate interaction with HCV, but contributes to optimal cell surface expression of LEL by mediating translocation of the whole CD81 molecule to the cell surface.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Nov
pubmed:issn
0168-1702
pubmed:author
pubmed:issnType
Print
pubmed:day
28
pubmed:volume
80
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1-10
pubmed:dateRevised
2011-11-17
pubmed:meshHeading
pubmed:year
2001
pubmed:articleTitle
The small extracellular loop of CD81 is necessary for optimal surface expression of the large loop, a putative HCV receptor.
pubmed:affiliation
Immunology Department, IRIS Research Institute, Chiron S.p.A., Via Fiorentina, 1 I-53100, Siena, Italy.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't