Linked Life Data

1327881

Source:http://linkedlifedata.com/resource/pubmed/id/1327881

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
1992-11-25
pubmed:abstractText
The heme propionate substituents in Pseudomonas cytochrome c-551 are partially buried by folds of polypeptide in the structure of the protein, and are involved in several hydrogen bonds. The ionization behavior of these groups has been of interest because the oxidation potential of the heme changes with pH in a manner that may parallel ionization of a propionate. The ionization pKa's of these groups have been determined by following the NMR chemical shifts of nearby protons acting as probes of the ionization state of the propionates. In Pseudomonas aeruginosa c-551 the 13-propionate (IUB-IUPAC porphyrin nomenclature) has been assigned a pKa of 3.1, and the 17-propionate a pKa of 7.2. In the homologous Pseudomonas stutzeri c-551, the respective propionates both have pKa values of 3.0.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Oct
pubmed:issn
0014-5793
pubmed:author
pubmed:issnType
Print
pubmed:day
26
pubmed:volume
311
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
213-6
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1992
pubmed:articleTitle
Ionization of the heme propionate substituents in pseudomonad cytochromes c-551.
pubmed:affiliation
Department of Chemistry, University of Alabama, Tuscaloosa 35487-0336.
pubmed:publicationType
Journal Article, Comparative Study, Research Support, U.S. Gov't, P.H.S.