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- *********************************
- * Ly-6 / u-PAR domain signature *
- *********************************
-
- A variety of GPI-linked cell-surface glycoprotein are composed of one or more
- copies of a conserved domain of about 100 amino acid residues [1,2]. These
- proteins are:
-
- - Urokinase plasminogen activator surface receptor u-PAR, which binds to
- u-PA and is responsible for its proteolysis-independent signal transduction
- activation effects.
- - The mouse family of Ly-6 T-cell antigens (Ly-6A, -6C, -6E, -6F and -6G).
- - CD59 (MACIF or MIRL), an inhibitor of the complement membrane attack
- complex action.
- - Herpesvirus saimiri CD59-related protein (gene 15).
- - Mouse thymocyte B cell antigen (ThB).
- - Squid glycoprotein Sgp-2.
-
- U-PAR contains three tandem copies of the domain, all the other proteins are
- made up of a single domain.
-
- As shown in the following schematic this conserved domain contains 10 cysteine
- residues involved in five disulfide bonds (in u-PAR, the first copy of the
- domain lacks the fourth disulfide bond).
-
- +------+ +------------------------+ +---+
- | | | | | |
- xCxxCxxxxxxCxxxxxCxxxxxCxxxxxxxxxxxxxxxxxxCxxxxCxxxxxxxxxxxxxxCCxxxCxxxxxxxx
- | | | |
- +---------------------+ +--------------+
-
- 'C': conserved cysteine involved in a disulfide bond.
-
- The signature pattern that detect this domain start at the extremity of the
- domain and ends at the sixth cysteine.
-
- -Consensus pattern: [EQR]-C-[LIVMFYAH]-x-C-x(5,8)-C-x(3,8)-[EDNQSTV]-C-{C}-
- x(5)-C-x(12,24)-C
- [The six C's are involved in disulfide bonds]
- -Sequences known to belong to this class detected by the pattern: ALL.
- -Other sequence(s) detected in SWISS-PROT: NONE.
- -Last update: June 1994 / First entry.
-
- [ 1] Behrendt N., Ploug M., Patthy L., Houen G., Blasi F., Dano K.
- J. Biol. Chem. 266:7842-7847(1991).
- [ 2] Ploug M., Kjalke M., Ronne E., Weidle U., Hoyer-Hansen G., Dano K.
- J. Biol. Chem. 268:17539-17546(1993).
-