home *** CD-ROM | disk | FTP | other *** search
- **********************************************
- * Serine proteases, omptin family signatures *
- **********************************************
-
- Escherichia coli protease VII (EC 3.4.21.87) (omptin) (gene ompT) [1] is an
- outer-membrane associated protease with a specificity for paired basic
- residues. It seems to be a serine protease inhibited by zinc ions. Omptin is
- highly similar to the following proteins:
-
- - Salmonella typhimurium outer membrane protease E (gene pgtE) [2], also
- specific for paired basic residues.
- - Yersinia pestis coagulase/fibrinolysin (plasminogen activator) (gene pla)
- [3]. This enzyme is encoded on a plasmid required for the pathogenic
- potential of the bacteria. It cleaves and activates plasminogen at the foci
- of infection; this allows plasmin to degrade fibrin barriers thus promoting
- the invasiveness of the plague bacteria.
- - Escherichia coli outer membrane protease ompP [4].
-
- The mature forms of these enzymes are proteins of about 280 to 300 amino-acid
- residues. As signature patterns, we selected two well conserved regions in the
- central part of these proteins.
-
- -Consensus pattern: W-T-D-x-S-x-H-P-x-T
- -Sequences known to belong to this class detected by the pattern: ALL.
- -Other sequence(s) detected in SWISS-PROT: NONE.
-
- -Consensus pattern: A-G-Y-Q-E-[ST]-R-[FYW]-S-[FYW]-[TN]-A-x-G-G-[ST]-Y
- -Sequences known to belong to this class detected by the pattern: ALL.
- -Other sequence(s) detected in SWISS-PROT: NONE.
-
- -Last update: June 1994 / Patterns and text revised.
-
- [ 1] Sugimura K., Nishihara T.
- J. Bacteriol. 170:5625-5632(1988).
- [ 2] Grodberg J., Dunn J.J.
- J. Bacteriol. 171:2903-2905(1989).
- [ 3] Sodeinde O.A., Goguen J.D.
- Infect. Immun. 57:1517-1523(1989).
- [ 4] Kaufmann A., Stierhof Y.-D., Henning U.
- J. Bacteriol. 176:359-367(1994).
-