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1je5

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{{STRUCTURE_1je5| PDB=1je5 | SCENE= }}
{{STRUCTURE_1je5| PDB=1je5 | SCENE= }}
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'''Crystal Structure of gp2.5, a Single-Stranded DNA Binding Protein Encoded by Bacteriophage T7'''
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===Crystal Structure of gp2.5, a Single-Stranded DNA Binding Protein Encoded by Bacteriophage T7===
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==Overview==
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The gene 2.5 protein (gp2.5) of bacteriophage T7 is a single-stranded DNA (ssDNA) binding protein that has essential roles in DNA replication and recombination. In addition to binding DNA, gp2.5 physically interacts with T7 DNA polymerase and T7 primase-helicase during replication to coordinate events at the replication fork. We have determined a 1.9-A crystal structure of gp2.5 and show that it has a conserved OB-fold (oligosaccharide/oligonucleotide binding fold) that is well adapted for interactions with ssDNA. Superposition of the OB-folds of gp2.5 and other ssDNA binding proteins reveals a conserved patch of aromatic residues that stack against the bases of ssDNA in the other crystal structures, suggesting that gp2.5 binds to ssDNA in a similar manner. An acidic C-terminal extension of the gp2.5 protein, which is required for dimer formation and for interactions with the T7 DNA polymerase and the primase-helicase, appears to be flexible and may act as a switch that modulates the DNA binding affinity of gp2.5.
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(as it appears on PubMed at http://www.pubmed.gov), where 11481454 is the PubMed ID number.
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{{ABSTRACT_PUBMED_11481454}}
==About this Structure==
==About this Structure==
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[[Category: Beta barrel]]
[[Category: Beta barrel]]
[[Category: Ob-fold]]
[[Category: Ob-fold]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 21:06:49 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Jul 1 20:06:19 2008''

Revision as of 17:06, 1 July 2008

Image:1je5.png

Template:STRUCTURE 1je5

Crystal Structure of gp2.5, a Single-Stranded DNA Binding Protein Encoded by Bacteriophage T7

Template:ABSTRACT PUBMED 11481454

About this Structure

1JE5 is a Single protein structure of sequence from Enterobacteria phage t7. Full crystallographic information is available from OCA.

Reference

Structure of the gene 2.5 protein, a single-stranded DNA binding protein encoded by bacteriophage T7., Hollis T, Stattel JM, Walther DS, Richardson CC, Ellenberger T, Proc Natl Acad Sci U S A. 2001 Aug 14;98(17):9557-62. Epub 2001 Jul 31. PMID:11481454

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