Linked Life Data

12482865

Source:http://linkedlifedata.com/resource/pubmed/id/12482865

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
8
pubmed:dateCreated
2003-2-17
pubmed:abstractText
We studied the role of the N-terminal region of the transmembrane domain of the human erythrocyte anion exchanger (band 3; residues 361-408) in the insertion, folding, and assembly of the first transmembrane span (TM1) to give rise to a transport-active molecule. We focused on the sequence around the 9-amino acid region deleted in Southeast Asian ovalocytosis (Ala-400 to Ala-408), which gives rise to nonfunctional band 3, and also on the portion of the protein N-terminal to the transmembrane domain (amino acids 361-396). We examined the effects of mutations in these regions on endoplasmic reticulum insertion (using cell-free translation), chloride transport, and cell-surface movement in Xenopus oocytes. We found that the hydrophobic length of TM1 was critical for membrane insertion and that formation of a transport-active structure also depended on the presence of specific amino acid sequences in TM1. Deletions of 2 or 3 amino acids including Pro-403 retained transport activity provided that a polar residue was located 2 or 3 amino acids on the C-terminal side of Asp-399. Finally, deletion of the cytoplasmic surface sequence G(381)LVRD abolished chloride transport, but not surface expression, indicating that this sequence makes an essential structural contribution to the anion transport site of band 3.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Feb
pubmed:issn
0021-9258
pubmed:author
pubmed:issnType
Print
pubmed:day
21
pubmed:volume
278
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
5564-73
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
2003
pubmed:articleTitle
The N-terminal region of the transmembrane domain of human erythrocyte band 3. Residues critical for membrane insertion and transport activity.
pubmed:affiliation
Department of Clinical Chemistry and Laboratory Medicine, Graduate School of Medical Sciences, Kyushu University, Fukuoka 812-8582, Japan.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't