dc.citation.conferencePlace |
KO |
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dc.citation.title |
The 15th Asia Pacific Physics Conference (APPC15) |
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dc.contributor.author |
Kim, Jin Kyun |
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dc.contributor.author |
Lee, Cheol |
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dc.contributor.author |
Lim, Seon Woo |
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dc.contributor.author |
Kim, Chae Un |
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dc.date.accessioned |
2024-01-31T20:07:13Z |
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dc.date.available |
2024-01-31T20:07:13Z |
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dc.date.created |
2022-12-22 |
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dc.date.issued |
2022-08-22 |
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dc.description.abstract |
Human carbonic anhydrase II (CA II) is a zinc metalloenzyme that catalyzes the reversible interconversion of carbon dioxide (CO2) and water to bicarbonate (HCO3-) and proton (H+). To understand the catalytic mechanism of CA II, intermediate states captured during catalytic activity are essential. In this study, the crystallographic intermediate structures of native CA II (Zn2+–CA II) and four types of metallovariants (apo, Co2+, Ni2+, and Cu2+–CA II) are presented. The intermediate structures of the native CA II and metallovariants show that the metal ion coordination geometry depends on metal ion (tetrahedral for Zn2+, tetrahedral to octahedral conversion for Co2+, octahedral for Ni2+, and trigonal bipyramidal for Cu2+). Further investigation demonstrates that these characteristic metal ion coordination geometries affect substrate/product binding and directly modulate the catalytic activity (100% for Zn2+, ~50% for Co2+, ~2% for Ni2+, and 0% for Cu2+). Through a comparative study on the intermediate states, we suggest how metal substitutions on CA II influence its catalytic activity beyond their primary chemical properties. |
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dc.identifier.bibliographicCitation |
The 15th Asia Pacific Physics Conference (APPC15) |
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dc.identifier.uri |
https://scholarworks.unist.ac.kr/handle/201301/75577 |
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dc.language |
영어 |
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dc.publisher |
Association of Asia Pacific Physical Societies (AAPPS) |
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dc.title |
Structural study on intermediate states of carbonic anhydrase II and its variants |
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dc.type |
Conference Paper |
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dc.date.conferenceDate |
2022-08-21 |
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