1t2t
From Proteopedia
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|PDB= 1t2t |SIZE=350|CAPTION= <scene name='initialview01'>1t2t</scene>, resolution 2.50Å | |PDB= 1t2t |SIZE=350|CAPTION= <scene name='initialview01'>1t2t</scene>, resolution 2.50Å | ||
|SITE= | |SITE= | ||
| - | |LIGAND= <scene name='pdbligand=ZN:ZINC ION'>ZN</scene> | + | |LIGAND= <scene name='pdbligand=DA:2'-DEOXYADENOSINE-5'-MONOPHOSPHATE'>DA</scene>, <scene name='pdbligand=DC:2'-DEOXYCYTIDINE-5'-MONOPHOSPHATE'>DC</scene>, <scene name='pdbligand=DG:2'-DEOXYGUANOSINE-5'-MONOPHOSPHATE'>DG</scene>, <scene name='pdbligand=DT:THYMIDINE-5'-MONOPHOSPHATE'>DT</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene> |
|ACTIVITY= | |ACTIVITY= | ||
| - | |GENE= ITEVIR ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id= | + | |GENE= ITEVIR ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=10665 Enterobacteria phage T4]) |
| + | |DOMAIN= | ||
| + | |RELATEDENTRY=[[1i3j|1I3J]] | ||
| + | |RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1t2t FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1t2t OCA], [http://www.ebi.ac.uk/pdbsum/1t2t PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1t2t RCSB]</span> | ||
}} | }} | ||
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==About this Structure== | ==About this Structure== | ||
| - | 1T2T is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/ | + | 1T2T is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Enterobacteria_phage_t4 Enterobacteria phage t4]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1T2T OCA]. |
==Reference== | ==Reference== | ||
Intron-encoded homing endonuclease I-TevI also functions as a transcriptional autorepressor., Edgell DR, Derbyshire V, Van Roey P, LaBonne S, Stanger MJ, Li Z, Boyd TM, Shub DA, Belfort M, Nat Struct Mol Biol. 2004 Oct;11(10):936-44. Epub 2004 Sep 7. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/15361856 15361856] | Intron-encoded homing endonuclease I-TevI also functions as a transcriptional autorepressor., Edgell DR, Derbyshire V, Van Roey P, LaBonne S, Stanger MJ, Li Z, Boyd TM, Shub DA, Belfort M, Nat Struct Mol Biol. 2004 Oct;11(10):936-44. Epub 2004 Sep 7. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/15361856 15361856] | ||
| - | [[Category: | + | [[Category: Enterobacteria phage t4]] |
[[Category: Single protein]] | [[Category: Single protein]] | ||
[[Category: Belfort, M.]] | [[Category: Belfort, M.]] | ||
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[[Category: Shub, D A.]] | [[Category: Shub, D A.]] | ||
[[Category: Stanger, M J.]] | [[Category: Stanger, M J.]] | ||
| - | [[Category: ZN]] | ||
[[Category: protein-dna complex]] | [[Category: protein-dna complex]] | ||
| - | ''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 23:50:29 2008'' |
Revision as of 20:50, 30 March 2008
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| , resolution 2.50Å | |||||||
|---|---|---|---|---|---|---|---|
| Ligands: | , , , , | ||||||
| Gene: | ITEVIR (Enterobacteria phage T4) | ||||||
| Related: | 1I3J
| ||||||
| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
Crystal structure of the DNA-binding domain of intron endonuclease I-TevI with operator site
Overview
Customary binding sites of intron-encoded homing endonucleases lie within cognate intronless alleles, at the so-called homing sites. Here, we describe a novel, high-affinity binding site for I-TevI endonuclease, encoded within the group I td intron of phage T4. This site is an operator that overlaps the T4 late promoter, which drives I-TevI expression from within the td intron. I-TevI binds the operator and homing sites with equal affinity, and functions as a transcriptional autorepressor. Distinct sequence and spacing requirements of the catalytic domain result in reduced cleavage activity on operator DNA. Crystallographic studies showed that the overall interactions of the DNA-binding domain with the operator and homing sites are similar, but have some different hydrogen-bonding contacts. We present a model in which the flexibility in protein-DNA interactions allows I-TevI to bind variant intronless alleles to promote intron mobility while facilitating its function in autorepression, and thereby persistence in its host.
About this Structure
1T2T is a Single protein structure of sequence from Enterobacteria phage t4. Full crystallographic information is available from OCA.
Reference
Intron-encoded homing endonuclease I-TevI also functions as a transcriptional autorepressor., Edgell DR, Derbyshire V, Van Roey P, LaBonne S, Stanger MJ, Li Z, Boyd TM, Shub DA, Belfort M, Nat Struct Mol Biol. 2004 Oct;11(10):936-44. Epub 2004 Sep 7. PMID:15361856
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