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- **********************************************************
- * Regulator of chromosome condensation (RCC1) signatures *
- **********************************************************
-
- The regulator of chromosome condensation (RCC1) [1] is a eukaryotic protein
- which binds to chromatin and interacts with ran, a nuclear GTP-binding
- protein, to promote the loss of bound GDP and the uptake of fresh GTP, thus
- acting as a guanine-nucleotide dissociation stimulator (GDS) [2]. The
- interaction of RCC1 with ran probably plays an important role in the
- regulation of gene expression.
-
- RCC1, known as PRP20 or SRM1 in yeast, pim1 in fission yeast and BJ1 in
- Drosophila, is a protein that contains seven tandem repeats of a domain of
- about 50 to 60 amino acids. As shown in the following schematic
- representation, the repeats make up the major part of the length of the
- protein. Outside the repeat region, there is just a small N-terminal domain of
- about 40 to 50 residues and, in the Drosophila protein only, a C-terminal
- domain of about 130 residues.
-
- +----+-------+-------+-------+-------+-------+-------+-------+-------------+
- |N-t.|Rpt. 1 |Rpt. 2 |Rpt. 3 |Rpt. 4 |Rpt. 5 |Rpt. 6 |Rpt. 7 | C-terminal |
- +----+-------+-------+-------+-------+-------+-------+-------+-------------+
- In Drosophila
-
- We developed two signature patterns for RCC1. The first is found in the N-
- terminal part of the second repeat; this is the most conserved part of RCC1.
- The second is derived from conserved positions in the C-terminal part of each
- repeat and detects up to five copies of the repeated domain.
-
- -Consensus pattern: G-x-N-D-x(2)-A-L-G-R-x-T
- -Sequences known to belong to this class detected by the pattern: ALL.
- -Other sequence(s) detected in SWISS-PROT: NONE.
-
- -Consensus pattern: [LIVMFA]-[STAGC](2)-G-x(2)-H-[STAGLI]-[LIVMFA]-x-[LIVM]
- -Sequences known to belong to this class detected by the pattern: ALL.
- -Other sequence(s) detected in SWISS-PROT: 30, in which the pattern is found
- only ONCE, while it is found from two to five times in the members of this
- family.
-
- -Expert(s) to contact by email: Boguski M.S.
- boguski@ncbi.nlm.nih.gov
-
- -Last update: June 1994 / Text revised.
-
- [ 1] Dasso M.
- Trends Biochem. Sci. 18:96-101(1993).
- [ 2] Boguski M.S., McCormick F.
- Nature 366:643-654(1993).
-