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| | {{STRUCTURE_2ghy| PDB=2ghy | SCENE= }} | | {{STRUCTURE_2ghy| PDB=2ghy | SCENE= }} |
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| - | '''Novel Crystal Form of the ColE1 Rom Protein'''
| + | ===Novel Crystal Form of the ColE1 Rom Protein=== |
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| - | ==Overview==
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| - | The RNA I modulator protein (Rom) acts as a co-regulator of ColE1 plasmid copy number by binding to RNA kissing hairpins and stabilizing their interaction. The structure of Rom has been determined in a new crystal form from X-ray diffraction data to 2.5 A resolution. In this structure, a dimer of the 57-amino-acid protein is found in the asymmetric unit. Each subunit consists almost entirely of two antiparallel alpha-helices joined by a short hairpin bend. The dimer contains a non-crystallographic twofold axis and forms a highly regular four-alpha-helical bundle. The structural packing in this novel crystal form is different from previously known Rom structures. The asymmetric unit contains one dimer, giving a crystal volume per protein weight (V(M)) of 1.83 A(3) Da(-1) and a low solvent content of 30%. Strong packing interactions and low solvation are characteristic of the structure. The Rom protein was cocrystallized with the Tar-Tar* kissing hairpin RNA. Although the electron-density maps do not show bound RNA, altered conformations in the side chains of Rom that are known to be involved in RNA binding have been identified. These results provide additional information about Rom protein conformational flexibility and suggest that the presence of a highly charged polymer such as RNA can promote tight packing of an RNA-binding protein, even when the RNA itself is not observed in the crystal.
| + | The line below this paragraph, {{ABSTRACT_PUBMED_16699189}}, adds the Publication Abstract to the page |
| | + | (as it appears on PubMed at http://www.pubmed.gov), where 16699189 is the PubMed ID number. |
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| | + | {{ABSTRACT_PUBMED_16699189}} |
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| | ==About this Structure== | | ==About this Structure== |
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| | [[Category: Rna one modulator protein]] | | [[Category: Rna one modulator protein]] |
| | [[Category: Structural packing]] | | [[Category: Structural packing]] |
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun May 4 05:07:46 2008'' | + | |
| | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jul 28 04:22:16 2008'' |
Revision as of 01:22, 28 July 2008
Template:STRUCTURE 2ghy
Novel Crystal Form of the ColE1 Rom Protein
Template:ABSTRACT PUBMED 16699189
About this Structure
2GHY is a Single protein structure of sequence from Escherichia coli. Full crystallographic information is available from OCA.
Reference
Novel crystal form of the ColE1 Rom protein., Jang SB, Jeong MS, Carter RJ, Holbrook EL, Comolli LR, Holbrook SR, Acta Crystallogr D Biol Crystallogr. 2006 Jun;62(Pt 6):619-27. Epub 2006, May 12. PMID:16699189
Page seeded by OCA on Mon Jul 28 04:22:16 2008
