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- **********************
- * CTF/NF-I signature *
- **********************
-
- Nuclear factor I (NF-I) or CCAAT box-binding transcription factor (CTF) [1,2]
- (also known as TGGCA-binding proteins) consists of a family of vertebrate
- nuclear proteins which recognize and bind, as dimers, the palindromic DNA
- sequence 5'-TGGCANNNTGCCA-3' present in viral and cellular promoters and in
- the origin of DNA replication of Adenovirus type 2. These proteins are
- individually capable of activating transcription and DNA replication.
-
- In a given species there are a large number of different CTF/NF-I proteins.
- The multiplicity of CTF/NF-I is generated both by alternative splicing and by
- multiple genes.
-
- CTF/NF-1 proteins contains 400 to 600 amino acids. The N-terminal 200 amino
- acids, which is almost perfectly conserved in all species and genes sequenced,
- mediates site-specific DNA recognition, protein dimerization, and AD2 DNA
- replication. The C-terminal 100 amino acids contain the transcriptional
- activation domain.
-
- As a specific signature for this family of proteins we selected a perfectly
- conserved highly charged 12 residues peptide located in the N-terminal part of
- CTF/NF-I.
-
- -Consensus pattern: R-K-R-K-Y-F-K-K-H-E-K-R
- -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: Mermod N.
- nmermod@ulys.unil.ch
- Gronostajski R.
- gronosr@ccsmtp.ccf.org
-
- -Last update: December 1992 / Text revised.
-
- [ 1] Mermod N., O'Neill E.A., Kelly T.J., Tjian R.
- Cell 58:741-753(1989).
- [ 2] Rupp R.A.W., Kruse U., Multhaup G., Goebel U., Beyreuther K.,
- Sippel A.E.
- Nucleic Acids Res. 18:2607-2616(1990).
-