1kfd: Difference between revisions
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'''CRYSTAL STRUCTURES OF THE KLENOW FRAGMENT OF DNA POLYMERASE I COMPLEXED WITH DEOXYNUCLEOSIDE TRIPHOSPHATE AND PYROPHOSPHATE''' | {{Structure | ||
|PDB= 1kfd |SIZE=350|CAPTION= <scene name='initialview01'>1kfd</scene>, resolution 3.9Å | |||
|SITE= | |||
|LIGAND= <scene name='pdbligand=CTP:CYTIDINE-5'-TRIPHOSPHATE'>CTP</scene> | |||
|ACTIVITY= [http://en.wikipedia.org/wiki/DNA-directed_DNA_polymerase DNA-directed DNA polymerase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.7.7 2.7.7.7] | |||
|GENE= | |||
}} | |||
'''CRYSTAL STRUCTURES OF THE KLENOW FRAGMENT OF DNA POLYMERASE I COMPLEXED WITH DEOXYNUCLEOSIDE TRIPHOSPHATE AND PYROPHOSPHATE''' | |||
==Overview== | ==Overview== | ||
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==About this Structure== | ==About this Structure== | ||
1KFD is a [ | 1KFD is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1KFD OCA]. | ||
==Reference== | ==Reference== | ||
Crystal structures of the Klenow fragment of DNA polymerase I complexed with deoxynucleoside triphosphate and pyrophosphate., Beese LS, Friedman JM, Steitz TA, Biochemistry. 1993 Dec 28;32(51):14095-101. PMID:[http:// | Crystal structures of the Klenow fragment of DNA polymerase I complexed with deoxynucleoside triphosphate and pyrophosphate., Beese LS, Friedman JM, Steitz TA, Biochemistry. 1993 Dec 28;32(51):14095-101. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/8260491 8260491] | ||
[[Category: DNA-directed DNA polymerase]] | [[Category: DNA-directed DNA polymerase]] | ||
[[Category: Escherichia coli]] | [[Category: Escherichia coli]] | ||
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[[Category: nucleotidyltransferase]] | [[Category: nucleotidyltransferase]] | ||
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 12:16:45 2008'' | ||
Revision as of 13:16, 20 March 2008
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| , resolution 3.9Å | |||||||
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| Ligands: | |||||||
| Activity: | DNA-directed DNA polymerase, with EC number 2.7.7.7 | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
CRYSTAL STRUCTURES OF THE KLENOW FRAGMENT OF DNA POLYMERASE I COMPLEXED WITH DEOXYNUCLEOSIDE TRIPHOSPHATE AND PYROPHOSPHATE
OverviewOverview
Crystal structures of the Klenow fragment (KF) of DNA polymerase I from Escherichia coli complexed with deoxynucleoside triphosphate (dNTP) or with pyrophosphate (PPi) determined to 3.9-A resolution by X-ray crystallography show these molecules binding within the cleft of the polymerase domain and surrounded by residues previously implicated in dNTP binding. The dNTP binds adjacent to the O-helix [Ollis, D. L., Brick, P., Hamlin, R., Xuong, N. G., & Steitz, T. A. (1985a) Nature 313, 762-766] with its triphosphate moiety anchored by three positively charged residues, Arg 754, Arg 682, and Lys 758, plus His 734 and Gln 708. The dNTP binding site observed in the crystal is consistent with the results of chemical modification including cross-linking and is also near many of the amino acid residues whose mutation affects catalysis [Polesky, A. H., Steitz, T. A., Grindley, N. D. F., & Joyce, C. M. (1990) J. Biol. Chem. 265, 14579-14591; Polesky, A. H., Dahlberg, M. E., Benkovic, S. J., Grindley, N. D. F., & Joyce, C. M. (1992) J. Biol. Chem. 267, 8417-8428]. However, we conclude that the position of at least the dNMP moiety of dNTP in the binary complex is not likely to be the same as in its catalytically relevant complex with primer-template DNA.
About this StructureAbout this Structure
1KFD is a Single protein structure of sequence from Escherichia coli. Full crystallographic information is available from OCA.
ReferenceReference
Crystal structures of the Klenow fragment of DNA polymerase I complexed with deoxynucleoside triphosphate and pyrophosphate., Beese LS, Friedman JM, Steitz TA, Biochemistry. 1993 Dec 28;32(51):14095-101. PMID:8260491
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