Linked Life Data

3202970

Source:http://linkedlifedata.com/resource/pubmed/id/3202970

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:dateCreated
1989-2-7
pubmed:abstractText
Cathepsin D was affinity-purified on pepstatin-Sepharose from control rat liver, from Yoshida ascites hepatoma (AH-130) cells, and from the liver of AH-130 tumour-bearing rats. Apparent molecular mass and immunological reactivity, as determined by SDS-PAGE and immunoblotting, were identical for the three enzyme preparations. The active enzyme concentrations were determined by active-site titration. Catalytic parameters were measured for the three enzymes using two synthetic chromogenic peptides as substrates, and inhibition constants were determined for the proteinases with a number of naturally-occurring as well as synthetic inhibitors. All three enzymes were clearly distinguished from cathepsin E, since none of them was affected by the protein inhibitor from Ascaris lumbricoides. The cathepsin D isolated from AH-130 cells was indistinguishable in its kinetic properties from rat liver cathepsin D, except in its susceptibility to inhibition by isovaleryl-pepstatin. On isoelectrofocusing, the isoenzyme pattern of the tumour enzyme was shifted somewhat towards more basic pI values by comparison with rat liver cathepsin D. These findings are considered with respect to the possibility of an alteration in the S4 subsite of the enzyme active site cleft.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
May
pubmed:issn
0177-3593
pubmed:author
pubmed:issnType
Print
pubmed:volume
369 Suppl
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
323-7
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1988
pubmed:articleTitle
Purification and properties of cathepsin D from rat Yoshida ascites hepatoma AH-130.
pubmed:affiliation
Dipartimento di Medicina e Oncologia Sperimentale, Università di Torino, Italy.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't