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- *************************************************
- * HMG-I and HMG-Y DNA-binding domain (A+T-hook) *
- *************************************************
-
- High mobility group (HMG) proteins are a family of relatively low molecular
- weight non-histone components in chromatin. HMG-I and HMG-Y are proteins of
- about 100 amino acid residues which are produced by the alternative splicing
- of a single gene (HMG-Y differs from HMG-I by the internal deletion of 11
- amino acids). HMG-I/Y bind preferentially to the minor groove of A+T-rich
- regions in double-stranded DNA. It is suggested that these proteins could
- function in nucleosome phasing and in the 3' end processing of mRNA
- transcripts. They are also involved in the transcription regulation of genes
- containing, or in close proximity to, A+T-rich regions.
-
- DNA-binding of these proteins is effected by a 11 residues domain, called the
- A+T-hook [1], this domain is repeated three times in the sequence of HMG-I/Y.
-
- -Consensus pattern: [AT]-x(1,2)-[RK](2)-[GP]-R-G-R-P-[RK]-x
- -Sequences known to belong to this class detected by the pattern: ALL.
- -Other sequence(s) detected in SWISS-PROT: human zinc finger protein HRX and
- herpesvirus Saimiri EDRF1.
- -Last update: October 1993 / Pattern and text revised.
-
- [ 1] Reeves R., Nissen M.S.
- J. Biol. Chem. 265:8573-8582(1990).
-