1hmf
From Proteopedia
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|ACTIVITY= | |ACTIVITY= | ||
|GENE= | |GENE= | ||
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| + | |RELATEDENTRY=[[1hme|1HME]] | ||
| + | |RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1hmf FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1hmf OCA], [http://www.ebi.ac.uk/pdbsum/1hmf PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1hmf RCSB]</span> | ||
}} | }} | ||
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[[Category: dna-binding]] | [[Category: dna-binding]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Mar 30 21:07:38 2008'' |
Revision as of 18:07, 30 March 2008
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| Related: | 1HME
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| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
STRUCTURE OF THE HMG BOX MOTIF IN THE B-DOMAIN OF HMG1
Overview
The conserved, abundant chromosomal protein HMG1 consists of two highly homologous, folded, basic DNA-binding domains, each of approximately 80 amino acid residues, and an acidic C-terminal tail. Each folded domain represents an 'HMG box', a sequence motif recently recognized in certain sequence-specific DNA-binding proteins and which also occurs in abundant HMG1-like proteins that bind to DNA without sequence specificity. The HMG box is defined by a set of highly conserved residues (most distinctively aromatic and basic) and appears to define a novel DNA-binding structural motif. We have expressed the HMG box region of the B-domain of rat HMG1 (residues 88-164 of the intact protein) in Escherichia coli and we describe here the determination of its structure by 2D 1H-NMR spectroscopy. There are three alpha-helices (residues 13-29, 34-48 and 50-74), which together account for approximately 75% of the total residues and contain many of the conserved basic and aromatic residues. Strikingly, the molecule is L-shaped, the angle of approximately 80 degrees between the two arms being defined by a cluster of conserved, predominantly aromatic, residues. The distinctive shape of the HMG box motif, which is distinct from hitherto characterized DNA-binding motifs, may be significant in relation to its recognition of four-way DNA junctions.
About this Structure
1HMF is a Single protein structure of sequence from Rattus norvegicus. Full crystallographic information is available from OCA.
Reference
Structure of the HMG box motif in the B-domain of HMG1., Weir HM, Kraulis PJ, Hill CS, Raine AR, Laue ED, Thomas JO, EMBO J. 1993 Apr;12(4):1311-9. PMID:8467791
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