Androgen-sensitive human prostate cancer cells, LNCaP, produce both N-terminally mature and truncated prostate-specific antigen isoforms
Författare
Summary, in English
To characterize prostate-specific antigen (PSA) produced by cancer cells, different isoforms of PSA secreted by the human prostate cancer cells, LNCaP, were purified. LNCaP-PSA production was induced by synthetic androgen, R1881. LNCaP-PSA was separated into four pools. The molecular mass of LNCaP-PSA isoforms in these pools was 34 kDa under reducing conditions and 29 kDa under nonreducing conditions on SDS/PAGE. pI of LNCaP-PSA isoforms varied from 6.8 to 8.2. Pool A had the highest specific activity, 37 nmol/(minxmg). All the pools formed stable complexes with alpha 1-antichymotrypsin and alpha 2-macroglobulin. The Fools contained 10-60% of N-terminally correctly processed LNCaP-PSA isoforms. According to the molecular modelling, the addition or deletion of two or four N-terminal amino acids could affect the three-dimensional structure and thereby remarkably reduce the enzyme activity of LNCaP-PSA.
Publiceringsår
1998
Språk
Engelska
Sidor
329-335
Publikation/Tidskrift/Serie
European Journal of Biochemistry
Volym
255
Issue
2
Länkar
Dokumenttyp
Artikel i tidskrift
Förlag
Wiley-Blackwell
Ämne
- Medical Genetics
Nyckelord
- prostate cancer
- N-terminal sequencing
- molecular modeling
- standardization
- enzyme activity
Status
Published
ISBN/ISSN/Övrigt
- ISSN: 0014-2956