Linked Life Data

7893810

Source:http://linkedlifedata.com/resource/pubmed/id/7893810

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
7
pubmed:dateCreated
1995-4-25
pubmed:abstractText
Rhodospirillum salexigens is a moderately halophilic purple phototrophic bacterium which grows optimally in 8% NaCl. The amino acid sequences of the two principal soluble cytochromes c have been determined. One of these is a cytochrome c2, similar in size to mitochondrial cytochrome c. While clearly of the same sequence class as mitochondrial cytochrome c and the proteins from several other Gram-negative bacteria, it does not show particular affinity to any already known sequence in terms of the percentage sequence identity. The other protein is a cytochrome c', but is also a divergent member of this widespread group. The lack of appreciable sequence identity to other species is probably due to a limit of divergence which has been reached for the majority of purple bacterial species. However, the numbers of insertions and deletions and their locations in cytochromes c2 and c' suggest that R salexigens may be related to Rhodospirillum molischianum. Like other electron transport proteins from halophiles, both of these cytochromes are notable for their high content of arginine as compared with lysine and both are acidic. However, they do not show any particular sequence homology to electron transport proteins that have been characterized from the extremely halophilic phototrophes of the genus Ectothiorhodospira. Thus, it appears that adaptation to halophilic habitats has independently occurred more than once in purple bacteria.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:issn
0300-9084
pubmed:author
pubmed:issnType
Print
pubmed:volume
76
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
583-91
pubmed:dateRevised
2009-9-29
pubmed:meshHeading
pubmed:year
1994
pubmed:articleTitle
Amino acid sequences of cytochromes c2 and c' from the moderately halophilic purple phototrophic bacterium Rhodospirillum salexigens.
pubmed:affiliation
Institute of Cell and Molecular Biology, University of Edinburgh, UK.
pubmed:publicationType
Journal Article, Comparative Study, Research Support, U.S. Gov't, P.H.S., Research Support, Non-U.S. Gov't