home *** CD-ROM | disk | FTP | other *** search
- *******************************
- * Fork head domain signatures *
- *******************************
-
- It has been shown [1] that some eukaryotic transcription factors contain a
- conserved domain of about 100 amino-acid residues, called the fork head
- domain, which is involved in DNA-binding [2]. Proteins known to contain this
- domain are listed below.
-
- - Drosophila fork head protein (fkh). Fkh is probably a transcription factor
- that regulates the expression of genes involved in terminal development.
- - Drosophila proteins FD1, FD2, FD3, FD4, and FD5 [3].
- - Drosophila proteins sloppy paired 1 and 2 (slp1 and slp2) involved in
- segmentation.
- - Mammalian transcriptional activators HNF-3-alpha, -beta, and -gamma. The
- HNF-3 proteins interact with the cis-acting regulatory regions of a number
- of liver genes.
- - Mammalian interleukin-enhancer binding factor (ILF). ILF binds to the
- purine-rich NFAT-like motifs in the HIV-1 LTR and the interleukin-2
- promoter. ILF may be involved in both positive and negative regulation of
- important viral and cellular promoter elements.
- - Mammalian transcription factor BF-1 which plays an important role in the
- establishment of the regional subdivision of the developing brain and in
- the development of the telencephalon.
- - Human HTLF, a protein that binds to the purine-rich region in human T-cell
- leukemia virus long terminal repeat (HTLV-I LTR).
- - Xenopus XFKH1, a protein essential for normal axis formation.
- - Caenorhabditis elegans lin-31; involved in the regulation of vulval cell
- fates.
- - Yeast HCM1, a protein of unknown function.
-
- The fork domain is highly conserved. We have developed two patterns for its
- detection. The first is a hexapeptide located at the N-terminal of the domain;
- the second is a heptapeptide located in the central section of the domain.
-
- -Consensus pattern: K-P-P-[FY]-S-[FY]
- -Sequences known to belong to this class detected by the pattern: ALL.
- -Other sequence(s) detected in SWISS-PROT: NONE.
-
- -Consensus pattern: W-[QK]-N-S-[LIV]-R-H
- -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] Weigel D., Jaeckle H.
- Cell 63:455-456(1990).
- [ 2] Clark K.L., Halay E.D., Lai E., Burley S.K.
- Nature 364:412-420(1993).
- [ 3] Haecker U., Grossnilaus U., Gehring W.J., Jaeckle H.
- Proc. Natl. Acad. Sci. U.S.A. 89:8754-8758(1992).
-