1lww: Difference between revisions
From Proteopedia
Jump to navigationJump to search
No edit summary |
No edit summary |
||
| Line 4: | Line 4: | ||
|PDB= 1lww |SIZE=350|CAPTION= <scene name='initialview01'>1lww</scene>, resolution 2.1Å | |PDB= 1lww |SIZE=350|CAPTION= <scene name='initialview01'>1lww</scene>, resolution 2.1Å | ||
|SITE= | |SITE= | ||
|LIGAND= <scene name='pdbligand=CA:CALCIUM+ION'>CA</scene> | |LIGAND= <scene name='pdbligand=BRG:8-BROMOGUANINE'>BRG</scene>, <scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <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=PED:PENTANE-3,4-DIOL-5-PHOSPHATE'>PED</scene> | ||
|ACTIVITY= | |ACTIVITY= | ||
|GENE= ogg1 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 Homo sapiens]) | |GENE= ogg1 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 Homo sapiens]) | ||
|DOMAIN= | |||
|RELATEDENTRY=[[1hu0|1HU0]], [[1lwv|1LWV]], [[1lwy|1LWY]], [[1ebm|1EBM]], [[1fn7|1FN7]] | |||
|RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1lww FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1lww OCA], [http://www.ebi.ac.uk/pdbsum/1lww PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1lww RCSB]</span> | |||
}} | }} | ||
| Line 14: | Line 17: | ||
==Overview== | ==Overview== | ||
Most spontaneous damage to bases in DNA is corrected through the action of the base-excision DNA repair pathway. Base excision repair is initiated by DNA glycosylases, lesion-specific enzymes that intercept aberrant bases in DNA and catalyze their excision. How such proteins accomplish the feat of catalyzing no fewer than five sequential reaction steps using a single active site has been unknown. To help answer this, we report the structure of a trapped catalytic intermediate in DNA repair by human 8-oxoguanine DNA glycosylase. This structure and supporting biochemical results reveal that the enzyme sequesters the excised lesion base and exploits it as a cofactor to participate in catalysis. To our knowledge, the present example represents the first documented case of product-assisted catalysis in an enzyme-catalyzed reaction. | Most spontaneous damage to bases in DNA is corrected through the action of the base-excision DNA repair pathway. Base excision repair is initiated by DNA glycosylases, lesion-specific enzymes that intercept aberrant bases in DNA and catalyze their excision. How such proteins accomplish the feat of catalyzing no fewer than five sequential reaction steps using a single active site has been unknown. To help answer this, we report the structure of a trapped catalytic intermediate in DNA repair by human 8-oxoguanine DNA glycosylase. This structure and supporting biochemical results reveal that the enzyme sequesters the excised lesion base and exploits it as a cofactor to participate in catalysis. To our knowledge, the present example represents the first documented case of product-assisted catalysis in an enzyme-catalyzed reaction. | ||
==About this Structure== | ==About this Structure== | ||
| Line 30: | Line 30: | ||
[[Category: Verdine, G L.]] | [[Category: Verdine, G L.]] | ||
[[Category: Yang, W.]] | [[Category: Yang, W.]] | ||
[[Category: borohydride]] | [[Category: borohydride]] | ||
[[Category: covalent trapping]] | [[Category: covalent trapping]] | ||
| Line 40: | Line 38: | ||
[[Category: reaction intermediate]] | [[Category: reaction intermediate]] | ||
''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 22:08:29 2008'' | ||
