Linked Life Data

14729270

Source:http://linkedlifedata.com/resource/pubmed/id/14729270

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PredicateObject
rdf:type
lifeskim:mentions
pubmed:dateCreated
2004-1-19
pubmed:databankReference
pubmed:abstractText
We screened the recently established draft genome of the early chordate Ciona intestinalis for genes encoding cytoplasmic intermediate filament (IF) proteins. The draft of the tunicate/urochordate genome contains only the five genes (IF-A, IF-B, IF-C, IF-D and IF-F) previously established by cDNA cloning. Three of these IF proteins (IF-D, IF-C, IF-A) were shown to be orthologs of vertebrate IF subfamilies I to III while two proteins (IF-B, IF-F) seemed tunicate specific. This is now firmly established for protein IF-F since the genomic data show that it arises as a fusion protein with a C-terminal annexin domain, a feature not found before in the very large collection of metazoan IF proteins. The results also confirm the previous proposal that urochordates lack orthologs of vertebrate type IV IF proteins. We discuss the striking increase of IF complexity from 5 tunicate to 65 human genes during chordate evolution. Thus the tunicate has a single keratin pair, which is expressed in the epidermis, while the human genome has at least 25 genes each for keratins I and keratins II. Finally there are four normal Ciona annexin genes in addition to the gene encoding the IF-annexin fusion proteins (IF-F).
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Feb
pubmed:issn
0378-1119
pubmed:author
pubmed:issnType
Print
pubmed:day
4
pubmed:volume
326
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
123-9
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
2004
pubmed:articleTitle
The genome of the early chordate Ciona intestinalis encodes only five cytoplasmic intermediate filament proteins including a single type I and type II keratin and a unique IF-annexin fusion protein.
pubmed:affiliation
Department of Biochemistry, Max Planck Institute for Biophysical Chemistry, Am Fassberg 11, 37077 Goettingen, Germany.
pubmed:publicationType
Journal Article