Linked Life Data

9535782

Source:http://linkedlifedata.com/resource/pubmed/id/9535782

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
1998-5-14
pubmed:abstractText
The CTD (carboxy-terminal repeat domain) of the largest subunit of RNA Polymerase II in most eukaryotes consists of from 26 to 52 seven amino acid repeats, the consensus sequence of which is YSPTSPS. Even though this consensus repeat does not contain residues that are normally protonated under the conditions used for positive ion electrospray mass spectrometry, we find that the CTD acquires about one proton per repeat when analyzed by this procedure. We have termed this phenomenon superprotonation. Superprotonation is apparently a property of the consensus sequence as the repeat peptide, (YSPTSPS)4, is superprotonated whereas other proteins and the repeat peptides (YSPTSPK)4, (YSPTSPR)4 and (YSPTAPR)4 are not. The highly conserved nature of the contiguous consensus repeats in organisms ranging from yeast to mammals implies that the functionally significant behavior of the domain is easily perturbed. We propose that CTD superprotonation is a manifestation of a unique biophysical property that will influence and could be the basis for consensus repeat function in vivo.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Apr
pubmed:issn
0006-291X
pubmed:author
pubmed:copyrightInfo
Copyright 1998 Academic Press.
pubmed:issnType
Print
pubmed:day
7
pubmed:volume
245
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
53-8
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1998
pubmed:articleTitle
Protonation of the neutral repeats of the RNA polymerase II CTD.
pubmed:affiliation
Department of Biochemistry, Duke University Medical Center, Durham, North Carolina, 27710, USA.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S.