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- * Poly(ADP-ribose) polymerase zinc finger domain *
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-
- Poly(ADP-ribose) polymerase (EC 2.4.2.30) (PARP) [1,2] is a eukaryotic enzyme
- that catalyzes the covalent attachment of ADP-ribose units from NAD(+) to
- various nuclear acceptor proteins. This post-translational modification of
- nuclear proteins is dependent on DNA. It appears to be involved in the
- regulation of various important cellular processes such as differentiation,
- proliferation and tumor transformation as well as in the regulation of the
- molecular events involved in the recovery of the cell from DNA damage.
-
- Structurally, PARP, about 1000 amino-acids residues long, consists of three
- distinct domains: an N-terminal zinc-dependent DNA-binding domain, a central
- automodification domain and a C-terminal NAD-binding domain.
-
- The DNA-binding region contains a pair of zinc finger domains which have been
- shown to bind DNA in a zinc-dependent manner. The zinc finger domains of PARP
- seem to bind specifically to single-stranded DNA.
-
- -Consensus pattern: C-[KR]-x-C-x(3)-I-x-K-x(3)-[RG]-x(16,18)-W-[FYH]-H-x(2)-C
- [The three C's and the H are zinc ligands]
- -Sequences known to belong to this class detected by the pattern: ALL.
- -Other sequence(s) detected in SWISS-PROT: NONE.
- -Last update: June 1994 / Text revised.
-
- [ 1] Althaus F.R., Richter C.R.
- Mol. Biol. Biochem. Biophys. 37:1-126(1987).
- [ 2] de Murcia G., Menissier de Murcia J.
- Trends Biochem. Sci. 19:172-176(1994).
-