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- *************************
- * Fibrillarin signature *
- *************************
-
- Fibrillarin [1] is a component of a nucleolar small nuclear ribonucleoprotein
- (SnRNP) particle thought to participate in the first step of the processing
- of pre-rRNA. In mammals, fibrillarin is associated with the U3, U8 and U13
- small nuclear RNAs [2].
-
- Fibrillarin is an extremely well conserved protein of about 320 amino acid
- residues. Structurally it consists of three different domains:
-
- - An N-terminal domain of about 80 amino acids which is very rich in glycine
- and contains a number of dimethylated arginine residues (DMA).
- - A central domain of about 90 residues which resembles that of RNA-binding
- proteins and contains an octameric sequence similar to the RNP-2 consensus
- found in such proteins.
- - A C-terminal alpha-helical domain.
-
- A protein evolutionary related to fibrillarin has been found [3] in
- archaebacteria such as Methanococcus vannielii or voltae. This protein (gene
- rrpA) is involved in pre-rRNA processing. It lacks the Gly/Arg-rich N-terminal
- domain.
-
- As a signature pattern, we selected the RNP-2 like octapeptide sequence.
-
- -Consensus pattern: [GST]-[LIVMP]-V-Y-A-V-E-F
- -Sequences known to belong to this class detected by the pattern: ALL.
- -Other sequence(s) detected in SWISS-PROT: NONE.
- -Last update: June 1994 / Pattern and text revised.
-
- [ 1] Aris J.P., Blobel G.
- Proc. Natl. Acad. Sci. U.S.A. 88:931-935(1991).
- [ 2] Bandziulis R.J., Swanson M.S., Dreyfuss G.
- Genes Dev. 3:431-437(1989).
- [ 3] Agha Amiri K.
- EMBL/GenBank: X73987.
-