Linked Life Data

9010931

Source:http://linkedlifedata.com/resource/pubmed/id/9010931

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
12
pubmed:dateCreated
1997-4-1
pubmed:abstractText
The thermolysin-like protease (TLP) produced by Bacillus stearothermophilus CU21 (TLP-ste) differs at 43 positions from the more thermally stable thermolysin (containing 316 residues in total). Of these differences, 26 were analysed by studying the effect of replacing residues in TLP-ste by the corresponding residues in thermolysin. Several stabilizing mutations were identified but, remarkably, considerable destabilizing mutational effects were also found. A Tyr-rich three residue insertion in TLP-ste (the only deletional/insertional difference between the two enzymes) appeared to make an important contribution to the stability of the enzyme. Mutations with large effects on stability were all localized in the beta-pleated N-terminal domain of TLP-ste, confirming observations that this domain has a lower intrinsic stability than the largely alpha-helical C-terminal domain. Rigidifying mutations such as Gly58-->Ala and Ala69-->Pro were among the most stabilizing ones. Apart from this observation, the analyses did not reveal general rules for stabilizing proteins. Instead, the results highlight the importance of context in evaluating the stability effects of mutations.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Dec
pubmed:issn
0269-2139
pubmed:author
pubmed:issnType
Print
pubmed:volume
9
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1181-9
pubmed:dateRevised
2009-11-19
pubmed:meshHeading
pubmed:year
1996
pubmed:articleTitle
Analysis of structural determinants of the stability of thermolysin-like proteases by molecular modelling and site-directed mutagenesis.
pubmed:affiliation
Department of Genetics, University of Groningen, Haren, The Netherlands.
pubmed:publicationType
Journal Article, Comparative Study