2vhc: Difference between revisions
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|PDB= 2vhc |SIZE=350|CAPTION= <scene name='initialview01'>2vhc</scene>, resolution 2.35Å | |PDB= 2vhc |SIZE=350|CAPTION= <scene name='initialview01'>2vhc</scene>, resolution 2.35Å | ||
|SITE= <scene name='pdbsite=AC1:Apc+Binding+Site+For+Chain+A'>AC1</scene>, <scene name='pdbsite=AC2:Mn+Binding+Site+For+Chain+A'>AC2</scene>, <scene name='pdbsite=AC3:Apc+Binding+Site+For+Chain+B'>AC3</scene>, <scene name='pdbsite=AC4:Mn+Binding+Site+For+Chain+B'>AC4</scene>, <scene name='pdbsite=AC5:Apc+Binding+Site+For+Chain+C'>AC5</scene> and <scene name='pdbsite=AC6:Mn+Binding+Site+For+Chain+C'>AC6</scene> | |SITE= <scene name='pdbsite=AC1:Apc+Binding+Site+For+Chain+A'>AC1</scene>, <scene name='pdbsite=AC2:Mn+Binding+Site+For+Chain+A'>AC2</scene>, <scene name='pdbsite=AC3:Apc+Binding+Site+For+Chain+B'>AC3</scene>, <scene name='pdbsite=AC4:Mn+Binding+Site+For+Chain+B'>AC4</scene>, <scene name='pdbsite=AC5:Apc+Binding+Site+For+Chain+C'>AC5</scene> and <scene name='pdbsite=AC6:Mn+Binding+Site+For+Chain+C'>AC6</scene> | ||
|LIGAND= <scene name='pdbligand= | |LIGAND= <scene name='pdbligand=APC:DIPHOSPHOMETHYLPHOSPHONIC+ACID+ADENOSYL+ESTER'>APC</scene>, <scene name='pdbligand=MN:MANGANESE+(II)+ION'>MN</scene> | ||
|ACTIVITY= | |ACTIVITY= | ||
|GENE= | |GENE= | ||
|DOMAIN= | |||
|RELATEDENTRY=[[1w46|1W46]], [[1w47|1W47]], [[1w4a|1W4A]], [[1w44|1W44]], [[1w48|1W48]], [[1w49|1W49]], [[1w4b|1W4B]], [[1w4c|1W4C]] | |||
|RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2vhc FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2vhc OCA], [http://www.ebi.ac.uk/pdbsum/2vhc PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=2vhc RCSB]</span> | |||
}} | }} | ||
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==About this Structure== | ==About this Structure== | ||
2VHC is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/ | 2VHC is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Pseudomonas_phage_phi12 Pseudomonas phage phi12]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2VHC OCA]. | ||
==Reference== | ==Reference== | ||
Structural Basis of Mechanochemical Coupling in a Hexameric Molecular Motor., Kainov DE, Mancini EJ, Telenius J, Lisal J, Grimes JM, Bamford DH, Stuart DI, Tuma R, J Biol Chem. 2008 Feb 8;283(6):3607-3617. Epub 2007 Dec 5. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/18057007 18057007] | Structural Basis of Mechanochemical Coupling in a Hexameric Molecular Motor., Kainov DE, Mancini EJ, Telenius J, Lisal J, Grimes JM, Bamford DH, Stuart DI, Tuma R, J Biol Chem. 2008 Feb 8;283(6):3607-3617. Epub 2007 Dec 5. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/18057007 18057007] | ||
[[Category: Pseudomonas phage | [[Category: Pseudomonas phage phi12]] | ||
[[Category: Single protein]] | [[Category: Single protein]] | ||
[[Category: Bamford, D H.]] | [[Category: Bamford, D H.]] | ||
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[[Category: Telenius, J.]] | [[Category: Telenius, J.]] | ||
[[Category: Tuma, R.]] | [[Category: Tuma, R.]] | ||
[[Category: hexameric helicase]] | [[Category: hexameric helicase]] | ||
[[Category: hydrolase]] | [[Category: hydrolase]] | ||
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[[Category: virus dsrna]] | [[Category: virus dsrna]] | ||
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Mar 31 05:12:16 2008'' | ||
Revision as of 05:12, 31 March 2008
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| , resolution 2.35Å | |||||||
|---|---|---|---|---|---|---|---|
| Sites: | , , , , and | ||||||
| Ligands: | , | ||||||
| Related: | 1W46, 1W47, 1W4A, 1W44, 1W48, 1W49, 1W4B, 1W4C
| ||||||
| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
P4 PROTEIN FROM BACTERIOPHAGE PHI12 N234G MUTANT IN COMPLEX WITH AMPCPP AND MN
OverviewOverview
The P4 protein of bacteriophage varphi12 is a hexameric molecular motor closely related to superfamily 4 helicases. P4 converts chemical energy from ATP hydrolysis into mechanical work, to translocate single-stranded RNA into a viral capsid. The molecular basis of mechanochemical coupling, i.e. how small approximately 1 A changes in the ATP-binding site are amplified into nanometer scale motion along the nucleic acid, is not understood at the atomic level. Here we study in atomic detail the mechanochemical coupling using structural and biochemical analyses of P4 mutants. We show that a conserved region, consisting of superfamily 4 helicase motifs H3 and H4 and loop L2, constitutes the moving lever of the motor. The lever tip encompasses an RNA-binding site that moves along the mechanical reaction coordinate. The lever is flanked by gamma-phosphate sensors (Asn-234 and Ser-252) that report the nucleotide state of neighboring subunits and control the lever position. Insertion of an arginine finger (Arg-279) into the neighboring catalytic site is concomitant with lever movement and commences ATP hydrolysis. This ensures cooperative sequential hydrolysis that is tightly coupled to mechanical motion. Given the structural conservation, the mutated residues may play similar roles in other hexameric helicases and related molecular motors.
About this StructureAbout this Structure
2VHC is a Single protein structure of sequence from Pseudomonas phage phi12. Full crystallographic information is available from OCA.
ReferenceReference
Structural Basis of Mechanochemical Coupling in a Hexameric Molecular Motor., Kainov DE, Mancini EJ, Telenius J, Lisal J, Grimes JM, Bamford DH, Stuart DI, Tuma R, J Biol Chem. 2008 Feb 8;283(6):3607-3617. Epub 2007 Dec 5. PMID:18057007
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