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- *****************************************
- * Myelin proteolipid protein signatures *
- *****************************************
-
- Myelin proteolipid protein (PLP or lipophilin) [1] is the major myelin protein
- from the central nervous system (CNS). It probably plays an important role in
- the formation or maintenance of the multilamellar structure of myelin. In man
- point mutations in PLP are the cause of Pelizaeus-Merzbacher disease (PMD),
- a neurologic disorder of myelin metabolism. In animals dismyelinating diseases
- such as mouse 'jimpy' (jp), rat md, or dog 'shaking pup' are also caused by
- mutations in PLP.
-
- PLP is a highly conserved [2] hydrophobic protein of 276 to 280 amino acids
- which seems to contain four transmembrane segments, two disulfide bonds and
- which covalently binds lipids (at least six palmitate groups in mammals) [3].
-
- PLP is highly related to M6, a neuronal membrane glycoprotein [4].
-
- As signature patterns for these proteins, we selected two conserved regions.
- The first pattern is located in the N-terminal region; at the extremity of the
- first transmembrane region. The second pattern is located in the extracellular
- loop between the last two transmembane regions and contains a cysteine
- involved in a disulfide bond.
-
- -Consensus pattern: G-V-A-L-F-C-G-C-G-H
- -Sequences known to belong to this class detected by the pattern: ALL.
- -Other sequence(s) detected in SWISS-PROT: NONE.
-
- -Consensus pattern: C-x-[ST]-x-[DE]-x(3)-[ST]-[FY]-H-L-F-I
- [C is involved in a disulfide bond]
- -Sequences known to belong to this class detected by the pattern: ALL.
- -Other sequence(s) detected in SWISS-PROT: NONE.
-
- -Expert(s) to contact by email: Hofmann K.O.
- khofmann@isrec-sun1.unil.ch
-
- -Last update: June 1994 / Patterns and text revised.
-
- [ 1] Popot J.-L., Pham-Dinh D., Dautigny A.
- J. Membr. Biol. 120:233-246(1991).
- [ 2] Schliess F., Stoffel W.
- Biol. Chem. Hoppe-Seyler 372:865-874(1991).
- [ 3] Weimbs T., Stoffel W.
- Biochemistry 31:12289-12296(1992).
- [ 4] Yan Y., Lagenaur C., Narayanan V.
- Neuron 11:423-431(1993).
-