Linked Life Data

14729343

Source:http://linkedlifedata.com/resource/pubmed/id/14729343

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
5
pubmed:dateCreated
2004-1-19
pubmed:abstractText
Islet amyloid is found in many patients suffering from type 2 diabetes. Amyloid fibrils found deposited in the pancreatic islets are composed of a 37-residue peptide, known as islet amyloid polypeptide (IAPP) (also known as amylin) and are similar to those found in other amyloid diseases. Synthetic IAPP peptide readily forms amyloid fibrils in vitro and this has allowed fibril formation kinetics and the overall morphology of IAPP amyloid to be studied. Here, we use X-ray fibre diffraction, electron microscopy and cryo-electron microscopy to examine the molecular structure of IAPP amyloid fibrils. X-ray diffraction from aligned synthetic amyloid fibrils gave a highly oriented diffraction pattern with layer-lines spaced 4.7 A apart. Electron diffraction also revealed the characteristic 4.7 A meridional signal and the position of the reflection could be compared directly to the image of the diffracting unit. Cryo-electron microscopy revealed the strong signal at 4.7 A that has been previously visualised from a single Abeta fibre. Together, these data build up a picture of how the IAPP fibril is held together by hydrogen bonded beta-sheet structure and contribute to the understanding of the generic structure of amyloid fibrils.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jan
pubmed:issn
0022-2836
pubmed:author
pubmed:issnType
Print
pubmed:day
30
pubmed:volume
335
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1279-88
pubmed:dateRevised
2010-11-18
pubmed:meshHeading
pubmed:year
2004
pubmed:articleTitle
Structural characterisation of islet amyloid polypeptide fibrils.
pubmed:affiliation
University of Cambridge, Structural Medicine Unit, Cambridge Institute for Medical Research and Department of Haematology, Hills Rd, Cambridge CB2 2XY, UK.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't