Linked Life Data

2269306

Source:http://linkedlifedata.com/resource/pubmed/id/2269306

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
1991-2-20
pubmed:databankReference
pubmed:abstractText
Methyl-coenzyme M reductase (MCR) catalyzes the methane-forming step in methanogenic archaebacteria. The reductase has been characterized in detail from Methanobacterium thermoautotrophicum strain Marburg and delta H, which grow on H2 and CO2 as energy source. During purification of the enzyme we have now discovered a second methyl-coenzyme M reductase (MCR II) in the two strains, which elutes at lower salt concentration from anion-exchange columns than the enzyme (MCR I) previously characterized. MCR II is similar to MCR I in that it is also composed of three different subunits alpha, beta, and gamma but distinct from MCR I in that the gamma subunit is 5 kDa smaller, as revealed by sodium dodecyl sulfate/polyacrylamide gel electrophoresis. The N-terminal amino acid sequences of the alpha, beta, and gamma subunits of MCR II and MCR I were found to be different in several amino acid positions. The respective sequences showed, however, strong similarities indicating that MCR II was not derived from MCR I by limited proteolysis. The relative amounts of MCR I and MCR II present in the cells were affected by the growth conditions. When the cultures were supplied with sufficient H2 and and CO2 and the cells grew exponentially, essentially only MCR II was found. When growth was limited by the gas supply, MCR I predominated.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Dec
pubmed:issn
0014-2956
pubmed:author
pubmed:issnType
Print
pubmed:day
27
pubmed:volume
194
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
871-7
pubmed:dateRevised
2007-7-23
pubmed:meshHeading
pubmed:year
1990
pubmed:articleTitle
Two genetically distinct methyl-coenzyme M reductases in Methanobacterium thermoautotrophicum strain Marburg and delta H.
pubmed:affiliation
Laboratorium für Mikrobiologie, Fachbereich Biologie, Philipps-Universität Marburg, Federal Republic of Germany.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't